VHF CHOICES

=================================================================----

R66 R67 R68 R69 Rx and Tx Receive only

=================================================================----

0 0 0 0 144 to 146 Mhz 130 to 180 Mhz

0 0 0 1 144 to 146 Mhz

0 0 1 0 1260 to 1300 Mhz

0 0 1 1 1240 to 1300 Mhz

0 1 0 0 140 to 150 Mhz 130 to 180 Mhz

0 1 0 1 140 to 174 Mhz

0 1 1 0 303 to 343 Mhz

0 1 1 1 8AL to 242 Mhz

1 0 0 0 144 to 148 Mhz

1 0 0 1 144 to 146 Mhz

1 0 1 0 1240 to 1300 Mhz

1 0 1 1 404 to 444 Mhz

1 1 0 0 140 to 160 Mhz

1 1 0 1 1260 to 1300 Mhz

1 1 1 0 101 to 141 Mhz

1 1 1 1 1R3 to 158L Mhz

=================================================================----

(Note: the receive only ranges are enabled by powering up the

unit with the up and down arrow buttons depressed...kjm)

CONTINUED IN FT470.17

From: KA8WPC@KF8OW.#NWOH.OH.USA.NA

YAESU FT-11R AND FT-41R SQUELCH FIX

If you are having a problem with the ht's squelch not setting right,

the following is a mod to put the unit into adjustment mode from the

keypad. It will cure the problem of the squelch opening when no signal

is present.

1. HOLD DOWN (CALL)(VOL UP)(VOL DWN) AT THE SAME TIME, AND PUSH THE

POWER SWITCH. THE DISPLAY WILL READ "S FULL"

2. 043'' (MHZ UP) 3 TIMES UNTIL "SQU TI" IS DISPLAYED

3. INJECT A .4uv SIGNAL AT THE ANTENNA INPUT. (THE FREQ SHOULD BE WHAT

WAS DISPLAYED BEFORE ENTERING THE ADJUSTMENT MODE.)

4. PRESS (FM) FOR 1/2 SECOND. "AD" WILL BE BLINKING IN THE UPPER LEFT

HAND CORNER.

5. PRESS (MR) AND THE BLINKING "AD" WILL STOP.

6. PRESS (CALL) FOR 1/2 SECOND, AND IT WRITES THE INFORMATION INTO

THE EEPROM, AND RETURNS THE DISPLAY TO THE ORIGINAL OPERATING MODE.

The other functions as i have found out are:

S FULLDDDDDDS METER ADJUST. (FULL SCALE W/SIGNAL)

S S1DDDDDDDDS METER ADJUST. (MIN SCALE W/SIGNAL)

HOPE THIS HELPS WITH ANY PROBLEMS YOU MIGHT HAVE WITH THE SQUELCH.

73, -=MIKE=-

EOF DE KA8WPC@KF8OW.#NWOH.OH.USA.NA

FT41R.2

From: KA8WPC@KF8OW.#NWOH.OH.USA.NA

THE FOLLOWING IS A MOD THAT WILL ELIMINATE A PL PROBLEM

WITH THE YAESU FT41R PORTABLE.

WORKING WITH YAESU, THE MOD WHICH CORRECTS THE PROBLEM OF

PL ENCODE, WHEN IN TX MODE, IS NOT A TRUE PL. WHAT THIS MEANS,

IS THAT THE PL WAVEFORM IS SAWTOOTHING. ADDING MIC AUDIO, MAKES

THE PROBLEM WORSE. TRYING TO ACCESS A REPEATER IN DECODE, CAUSES

THE SIGNAL TO DROP OUT OF THE REPEATER WHEN MIC AUDIO IS APPLIED.

ALSO, IN COUNTING THE PL, EXAMPLE 103.5hz. GENERATES A PL FROM

103.9-104.7. ALSO THE MIC GAIN WAS SO HIGH, THAT AMBIENT NOISE

WAS BAD. SO, AFTER CALLS TO YAESU USA, AND YAESU JAPAN, THE MOD

LISTED BELOW, STABILIZES THE PL, GIVES IT A SINE WAVE OUTPUT, AND

LOWERS THE GAIN.

NOTE: IF YOU ARE NOT FAMILIAR WITH SURFACE MOUNT TECHNOLOGY,

BE EXTRA CAREFUL!

THE BOARD NEEDED TO MODIFY IS THE AUDIO BOARD.

REMOVE THE 4 BLACK SCREWS ON THE REAR OF THE RADIO.

REMOVE THE 2 SILVER SCREWS ON THE BOTTOM OF THE BATTERY CASE.

CAREFULLY SEPARATE THE FRONT/REAR HALVES.

SET THE UNIT FRONT DOWN, AND REMOVE THE 2 BRASS SCREWS HOLDING THE

AUDIO BOARD. GENTLY PRY THE AUDIO BOARD FROM THE MICROPROCESSOR BOARD.

TURN THE AUDIO BOARD OVER. THIS IS THE SIDE THE MODS ARE DONE.

ABOUT CENTER, ON THE HIGH SIDE, LOCATE Q3001. (14 PIN IC)

JUST ABOVE AND TO THE LEFT OF PIN 1, IS LOCATED CAPACITOR C3005.

IT SHOULD BE THE BIGGER OF ALL THE PARTS IN THE AREA.

IT IS IN SERIES WITH PIN 14 OF Q3001 AND R3007.

REMOVE THIS CAP. INSTALL A .047uf IN IT'S PLACE. (I USED A .039uf)

INSTALL A 180K RESISTOR IN PARALLEL WITH R3001 (ACROSS Q3001 PINS 1&2)

INSTALL A 56K RESISTOR IN PARALLEL WITH R3002 (ACROSS Q3001 PINS 13&14)

WHEN DONE SLIGHT TWEAKING MAY NEED DONE WITH THE DEVIATION CONTROL.

FOR APROX 5khz. OF MIC AUDIO WITH PL.

IT IS LOCATED ON THE FRONT BOARD NEAR THE TOP.

LOOK AT THE SCHEMATIC, AND YOU WILL SEE WHAT IS HAPPENING WITH THE MOD!

THE CAPACITOR ADDITION IS CHANGING AN R/C CIRCUIT FOR TIMING OF THE PL.

RESISTOR R3001 CONTROLS THE GAIN OF THE IDC AMP FOR TT AND MIC AUDIO.

RESISTOR R3002 CONTROLS THE GAIN OF THE MIC AUDIO ONLY.

AGAIN, DO THIS MOD ONLY IF YOU HAVE KNOWEDGE OF SURFACE MOUNT TECHNOLOGY!

ALSO, I CLAIM NO RESPONSIBILITY FOR ANYONE DOING THIS MOD.

THIS MOD WAS FOR ME FROM YAESU. I SUGGEST THAT IF YOU ARE UNEASY ABOUT

PERFORMING THIS MOD, CONTACT YOUR SERVICE TECH OR YAESU.

OTHER THAN THE ABOVE PROBLEM, I OWN BOTH THE FT11R AND THE FT41R, AND

I RECOMMEND EITHER OR BOTH TO ANYONE LOOKING FOR A SMALL SIZE POWERHOUSE

HT, LOADED WITH ALL KINDS OF FEATURES!

73, -=MIKE=-

[email protected]

PHONE: (419) 666-8849

FT41R.3

From: [email protected] (Ditto M.)

Subject: Expanded receive mod for Yaesu FT-41R

keypad mod for getting just the

expanded receive. You just hold down both the up and down arrow keys

while powering the unit on.

Now it accepts frequencies from 420-470 MHz instead of its normal limits

of 430-450. It still only transmits on 430-450. It also now requires

the 100MHz digit to be entered when a frequency is directly entered. I

don't know why this is since it doesn't seem to accept any frequencies

that don't start with "4".

=========================================================================

Note: I haven't tried or verified this, proceed at your own risk. WA2ISE



FT41R.4

From: KA8WPC@KF8OW.#NWOH.OH.USA.NA

KA8WPC/TPK 1.81 MSG #:736 DATE:12-24-93 TIME:1:35Z

HI!

I SENT OUT RECENTLY, THE MOD FOR THE YAESU FT-11R.

I JUST RECEIVED MY NEW FT-41R (UHF). IT IS JUST AS

FANTASTIC AS THE FT-11R (VHF). NO COMPLAINTS AT ALL.

SO, AFTER PLAYING WITH IT, I ENCLOSE THE FOLLOWING:

YAESU FT-41R MARS MODS! -(UHF)-

FIRST REMOVE THE SIX SCREWS HOLDING THE BACK COVER.

(4 ON THE BACK CASE, AND 2 ON THE BOTTOM OF THE BATERY COMPARTMENT.)

CAREFULLY SEPARATE THE FRONT AND BACK HALVES. (CAREFUL NOT TO DAMAGE

THE FLEX CIRCUIT CONNECTING THE 2 HALVES.)

WITH THE FRONT OF THE RADIO FACING DOWN, REMOVE THE 2 BRASS SCREWS

HOLDING THE SECOND BOARD TO THE MICROPROCESSOR BOARD. (THIS IS THE

BOARD CONNECTED TO THE FRONT CASE.)

CAREFULLY PRY THE BOARD FROM THE MICROPROCESSOR BOARD, EXPOSING THE

MICROPROCESSOR BOARD.

YOU SHOULD NOW HAVE THE FRONT COVER WITH THE MICROPROCESSOR BOARD,

AND THE OTHER 2 BOARDS SEPARATED BY THE FLEX CIRCUIT.

LOOK AT THE MICROPROCESSOR BOARDS LOWER LEFT CORNER.

THERE YOU WILL SEE SOLDER JUMPER PADS AS ILLUSTRATED BELOW WITH

THE FOLLOWING PINS JUMPERED:

uP PINS ,2,4,6, AND 7 ARE JUMPERED

REMOVE JUMPERS 2 AND 4

FOR OUT OF BAND OPERATION.

o o o6o

o2o o o

o o o7o

o4o o o

REASSEMBLE UNIT IN REVERSE ORDER, AND INSTALL SCREWS.

INSTALL BATTERY PACK.

HOLD DOWN (MR), (VFO), AND (2) AND TURN POWER ON.

TURN POWER BACK OFF

HOLD DOWN (UP ARROW), AND (DOWN ARROW) AND TURN POWER ON.

NOW KEYBOARD ENTRY IS DIRECT, AND UNIT WILL TX/RX FROM

APROX 430-470mhz.

IT WILL ALSO RX 800 AND 900 MHZ. (AT A REDUCED SENSITIVITY)

THIS MOD DOES WORK AND HAS BEEN TESTED. IT IS STILL ILLEGAL TO

TRANSMIT OUT OF BAND UNLESS YOU HAVE A VALID MARS OR CAP PERMIT.

73, -=MIKE=-

KA8WPC

EOF DE KA8WPC@KF8OW.#NWOH.OH.USA.NA

FT41R

Original from WH6OQ to MOD@ALLUSA

Extended rx mod for the Yaesu FT-41R 440 HT: just press the up/down

MHz keys while powering on, and now you'll get 420-470MHz rx. This will

erase all memories!

Does anyone know of the extended tx mod for this?

73 de WH6OQ, Manny



Original from WA2ISE to MODS@ALLUS

copied from the Internet:

From: [email protected] (Ian Jordan)

Newsgroups: rec.radio.amateur.misc

Subject: Yeasu FT416 mods

Read the FT-415 mods. Exactly the same internally.

But the extend tx mod will kill your Automatic repeater

offset (ARO), so you have to be willing to loose that.

* * Ian Jordan * *

Here's the FT415 file mentioned above:

Sb: FT415/815 mods

YAESU FT-415 expanded frequency range:

--------------------------------------

Remove the screws holding battery track and rear cover.

Locate the "CONTROL UNIT".

Close jumpers 3, 5, AND 7 if not allready closed, 6 must be open. Let other

jumpers unchanged.

Reassemble the radio.

Turn on the radio and program it as following:

"1" 135.000 PRESS VFO THIS IS LOWER RX LIMIT

"2" 185.000 PRESS VFO THIS IS UPPER RX LIMIT

"3" 135.000 PRESS VFO THIS IS LOWER TX LIMIT

"4" 185.000 PRESS VFO THIS IS UPPER TX LIMIT

Press and hold MR, VFO and 2 while TURNING ON if you need to reset or

reprogram the radio.

YAESU FT-815 expanded frequency range:

--------------------------------------

Same as above.

Close jumpers 1, 5, and 7.

Program 420 to 460 mhz as above.

NOTES:

------

Jumper 9 is for battery back-up.

Jumper 10 is for 1750 Hz repeater tone acces.

Jumper 1 is for 25 KHZ steps default value.

73's de Phil, F1LOU @ ON7RC.BT.BEL.EU

======================================================================

Note: I haven't tried or verified this, proceed at your own risk. And

DO NOT transmit outside of legal bands! WA2ISE



From: [email protected] (Ian Jordan)

Subject: Yeasu FT416 mods

Read the FT-415 mods. Exactly the same internally.

But the extend tx mod will kill your Automatic repeater

offset (ARO), so you have to be willing to loose that.

* * Ian Jordan * *

Here's the FT415 file mentioned above:

Sb: FT415/815 mods

YAESU FT-415 expanded frequency range:

--------------------------------------

Remove the screws holding battery track and rear cover.

Locate the "CONTROL UNIT".

Close jumpers 3, 5, AND 7 if not allready closed, 6 must be open. Let other

jumpers unchanged.

Reassemble the radio.

Turn on the radio and program it as following:

"1" 135.000 PRESS VFO THIS IS LOWER RX LIMIT

"2" 185.000 PRESS VFO THIS IS UPPER RX LIMIT

"3" 135.000 PRESS VFO THIS IS LOWER TX LIMIT

"4" 185.000 PRESS VFO THIS IS UPPER TX LIMIT

Press and hold MR, VFO and 2 while TURNING ON if you need to reset or

reprogram the radio.

YAESU FT-815 expanded frequency range:

--------------------------------------

Same as above.

Close jumpers 1, 5, and 7.

Program 420 to 460 mhz as above.

NOTES:

------

Jumper 9 is for battery back-up.

Jumper 10 is for 1750 Hz repeater tone acces.

Jumper 1 is for 25 KHZ steps default value.

73's de Phil, F1LOU @ ON7RC.BT.BEL.EU

======================================================================

Note: I haven't tried or verified this, proceed at your own risk. And

DO NOT transmit outside of legal bands! WA2ISE



*************************

Subject: FT-411 OUT OF BAND MODIFICATIONS

1) Open the front cover

2) Locate the C.P.U. unit (it is located on the front cover ).

3) Locate Jumpers 1,2,3 and 4 , These are the band setting Jumpers

4) Jumpers No 1,2 and 4 should be disconnected ,and Jumper No 3 should

be connected.

5) Close the radio .

6) Apply power to the radio and turn it on.

The display will initialize with memory No 1 flashing and the

frequency display will show 1.000

7) Now , adjust the display to the desired lowest receive frequency

When done ,press VFO.

The memory CH will now show 2 flashing .

8) Adjust the display to the desired highest receive frequency

When done press VFO .

The memory CH will now show 3 flashing .

9) Adjust the display to the desired lowest transmit frequency

When done ,press VFO.

The memory CH will now show 4 flashing .

10) Now , adjust the display to the desired highest transmit frequency

When done ,press VFO.

11) The rig is now set for your programed band on transmit and receive.

COMMENTS

--------

1) After the rig was programmed to the band and you want to change it

to other ranges you will have to open the rig again and disconnect

Jumper No 3 then to apply power to the radio ,turn it on again

open it again ,connect Jumper No 3 back and repeat from steps 5 .

*******************************************

Subject: FT-411 OUT OF BAND MODIFICATION

I discovered a nice trick to increase its frequency coverage.

It is so simple that you don't even have to open your hand held.

All you have to do is:

1. Make sure that the power switch is off.

2. press the UP arrow and DOWN arrow together, at the same time

(those keys are also called A, and B.

and they placed at the upper right side of the keyped)

3. Keep pressing both buttons and turn the power on.

Now you can receive 130-174Mhz, and transmit 140-150Mhz

CAUTON: When you do this modification the memories can be erased.

Ayhow I think it is not the end, and there are some more options.

If you do have some more information about this Hand held,

Please leave me a msg with it.

*********************************************

Subject: FT411 MODIFICATION VIA COMPUTER

I was unhappy with the FT-411's "3" mode because the frequency had

to be entered starting with the 100 MHz digit, and the ARS function

would not work. I now use it in the "2" (normal) mode with the

following mod.

I used the "clone" mode to dump the FT-411's ram to a computer. It's

9600 baud, 1 start bit, 1 stop bit, CMOS logic. 544 bytes are dumped

when the up arrow is pressed. Starting with byte $211 are the upper

and lower transmit and receive frequencies, stored in BCD. I changed

these to the limits I wanted. My FT-411's upper PLL limit is 195.4

MHz, so I used 195 MHz. The lower limit MUST remain set to 130 MHz

(magic number) or the keyboard entry of frequencies will start with the

1 MHz digit .VS. the 10 MHz digit. To put the data back into ram, just

press the down arrow and send the new 544 bytes to the FT-411. You

could also just clone an H.T. that has the limits you want. You can

not clone a mode "3" H.T. to a mode "2" H.T., however. The mode is

contained in the first byte, which must match.

************************************************

Subject: FT 411 TO PACKET

FOR THOSE THAT WISH TO CONNECT A FT 411 TO PACKET VIA A MFJ TNC THE

FOLLOWING MODIFICATIONS ARE NEEDED. IN THE BLACK LEAD FROM THE TX AUDIO

OUT INSERT A .01-0.1UF CAP. IN THE RED LEAD FROM THE PTT, INSERT A 2.2K RST.

THEN COMBINE THESE INTO A COMMON SINGLE LEAD CONNECTED TO THE TIP OF THE

SMALL MIKE PLUG. THE YELLOW RX AUDIO GOES TO THE TIP OF THE LARGE SPEAKER

PLUG. AND THE SHIELD GOES TO THE RING OF THE LARGE PLUG. THIS INFORMATION

CAN BE FOUND IN THE 1989 AUGUST ISSUE OF 73. PAGE 58

IT WORKES FOR ME .73'S N8KLT

**************************************************

Yaesu has sent out the following as an extended frequency coverage mod for the

FT-411. I tried it and it works as advertised. First remove all black screws

from case. Remove 4 silver screws holding the battery connector on bottom.

Remove the 3 knobs. Carefully separate the front and back. There is a

multiconductor trace between the front and back so hinge the front from the

back to keep from putting too much tension on the traces. Looking at the board

side of the front cover there are 8 little solder pads. They are half hidden

by a cover plate and the multiconductor trace. Pad 2 will have a solder

connection, the rest are open. Remove the solder fro the battery connector on

bottom.

Remove the 3 knobs. Carefully separate the front and back. There is a

multiconductor trace between the front and back so hinge the front from the

back to keep from putting too much tension on the traces. Looking at the board

side of the front cover there are 8 little solder pads. They are half hidden

by a cover plate and the multiconductor trace. Pad 2 will have a solder

connection, the rest are open. Remove the solder from pad 2 and place a solder

bridge on pad 3. All other pads will be open. Close up radio.

Now when you turn on radio it will come up with 1.000 in the display. Memory

channel should say 1. Program in the lower receive frequency.

Example 1 - 4 - 1 - 0 then push VFO key. The Memory channel should go to 2.

Now program in the upper receive frequency. i.e. 1 - 6 - 5 - 0 and push VFO

key. Memory will move to 3. Do same for lower and upper transmit frequencies.

Note. The receiver sensitivity falls off at 162.55 to about 1 uv. The step and

repeater offset will need to be re-programmed also. Follow instruction manual.



FILE OF INFORMATION ON FT301 MODIFICATIONS

DISPLAY LED'S:

THESE RUN HOT AND OFTEN BURN OUT SEGMENTS. CURE IS TO REDUCE OPERATING

VOLTAGE WHICH TYPICALLY RUNS >5V. FROM VOLTAGE REGULATOR Q2 ON THE MAIN

CHASSIS. A 1N400 DIODE IN SERIES WITH THE OUTPUT OF Q2 DROPS NEARLY A

VOLT FROM THE SUPPLY VOLTAGE. IF THE DISPLAYS STILL WORK OK, THEY WILL

RUN COOL. (PREVIOUSLY, OTHERS HAVE REMOVED RED PLASTIC LENS FOR BETTER

VENTILLATION, OR HAVE EVEN DRILLED HOLES THRU TOP OF RIG.)

SPEECH PROC:

OFTEN FT301'S HEARD ON THE AIR HAVE HAD DISTORTED AUDIO. A SINGLE I.C.

CONTAINS ALL THE MIC AMPLIFICATION AND ALSO DRIVES THE RING MODULATOR

IN THE SSB TRANSMIT PATH. THIS AMP IS DRIVEN TO HORRIBLE DISTORTION IF

THE STOCK (HANDHELD) MIC IS USED AT FULL CLOCKWISE MIC GAIN SETTING.

THIS IS THE WRONG PLACE TO HAVE CLIPPING OCCUR. ALSO RESPONSE OF AMP

IS FAR TO "GENEROUS." SUGGEST LIMITING LOW END RESPONSE WITH SERIES 2.

UF CAP (MUST BE MYLAR OR NON-POLAR) AT MICROPHONE CONNECTOR. HAVE

IGNORED THE FACT THAT THE HI END RESPONSE OF THAT AMP GOES WELL BEYOND

50 KHZ. R.F. CLIPPING IN MY FT301 WAS ACTUALLY ONLY ABOUT 6Db. DUE TO THE LACK

OF RF GAIN IN THE CLIPPER STAGES. THIS CURE FOR LOW GAIN WAS MOST

EFFECTIVE: AN EXTRA STAGE OF GAIN IS AVAILABLE FOR THE TAKING ON THE

"NB UNIT" CARD. (Q201 IS NORMALLY USED ONLY WITH THE PROCESSER OFF AS

AN ALTERNATE RF PATH) RIG Q201 IN SERIES Q202, AND KEEP BOTH STAGES

POWERED UP REGARDLESS OF POSITION OF "RF PROC" SWITCH. WITH THE EXTRA

STAGE, IT IS EASILY POSSIBLE TO KEEP THE RING MODULATOR IN THE LINEAR

REGION AND STILL DEVELOP 15 TO 20 Db. OF RF CLIPPING.

TO IMPLEMENT THIS CHANGE: JUMPER PINS 10 & 11 ON THE N.B. CARD

SUPPLIES VOLTAGE). OPEN 1 K R205 AT WIPER TO VR201, LET IT HANG.

OPEN 0.01 C204 AT TRANSFORMER, AND JUMPER TO WIPER OF R205 WITH SHORT

LEAD (UNSHIELDED SEEMS OK). RUN VR201 AT NO MORE THAN ABOUT 3/4 GAIN.

WITH HIGH LEVELS OF RF CLIPPING, IT IS IMPORTANT THAT THE AUDIO BE

RATHER LACKING IN BASS TO AVOID A MUDDY SOUND. PREEMPHASIS ACCROSS THE

FULL AUDIO BANDPASS SOUNDS PRETTY BAD, SO I WOULD UP WITH A .1 CAP IN

SERIES WITH THE WIPER ON THE MIKE GAIN CONTROL AND FINALLY SHUNTED THAT

CAP WITH ABOUT 1000 OHMS (ADJUST THAT VALUE OF RESISTANCE TO GIVE GOOD

ARTICULATION AND STILL BE SEMI-PLEASANT.

INFO VIA K2ZLU @ KD6TH-4

I haven't tried or verified this, proceed at your own risk! WA2ISE



FROM: M. P. ("JUG") JOGOLEFF, WA6MBZ

@ K6TZ BBS

RE: YAESU MICRO-PHONE NUMBER MH-15 C8.

MOD.: HOW TO PREVENT THE TOUCH-TONE PAD FROM

AUTOMATICALLY KEYING UP YOUR RIG.

RIGS INVOLVED: THIS MIC. COMES WITH THE YAESU FT 290 MK

II (2 METER RIG), THE FT 690 MK II (6 METER RIG), OR THE FT 490

MK II (UHF RIG), AND POSSIBLY OTHERS.

1) TAKE THE THREE (3) BACK SCREWS OFF.

2) TAKE THE TWO (2) SCREWS OFF THE CIRCUIT BOARD TO FREE

IT FROM THE CASE.

3) FIND THE RED WIRE GOING TO THE MICRO-SWITCH, IE, THE

PTT LINE.

4) FOLLOW THAT RED WIRE TO THE CIRCUIT BOARD. AT THAT

PLACE ON THE CIRCUIT BOARD ANOTHER RED WIRE WILL JOIN THE FIRST

ONE.

5) UN-SOLDER BOTH RED WIRES FROM THE CIRCUIT BOARD AND

CLEAN UP THE SOLDER MESS, OTHERWISE HUM WILL OCCUR.

6) SOLDER THE TWO RED WIRES TOGETHER AND COVER WITH TAPE

OR SHRINK TUBING.

7) PUT THE CIRCUIT BOARD IN PLACE AND SCREW IT DOWN.

8) PUT THE "LOCK" SLIDE SWITCH BACK IN PLACE.

9) PUT THE REST OF THE CASE ON.

10) PUT THE OUTSIDE SCREWS IN.

11) YOU ARE NOW READY TO TRY IT OUT, SO GO AHEAD AND RE-

ATTACH IT TO YOUR RIG!

12) ALL SHOULD WORK:

PTT WORKS AND RELEASES,

MIC PASSES AUDIO,

TOUCH TONES WORK WHEN PTT BUTTON HELD,

TOUCH-TONE RED "LED" STILL LIGHTS UP WHEN TOUCH-TONE

PAD KEYS ARE DEPRESSED, EVEN IF PTT BUTTON IS NOT HELD DOWN,

NO HUM NOTICED.



YAESU FT-2700

--------------------------------------------------------------------

D09 D10 D11 D12

0 0 0 0 NO WORK

0 0 0 1 AS SHIPPED

0 0 1 0 -151.600

0 0 1 1 144-154 MHZ 12/25

0 1 0 0 -151.600

0 1 0 1 144-148 MHZ 12/25

0 1 1 0 144-154 MHZ 5/10

0 1 1 1 144-146 MHZ 10/20

1 0 0 0 -151-

1 0 0 1 144-146 MHZ 12/25

1 0 1 0 144-146 MHZ 5/10

1 0 1 1 144-146 MHZ 10/20

1 1 0 0 -151.600

1 1 0 1 140.150 12/25

1 1 1 0 144-148 MHZ 5/10

1 1 1 1 144-154 MHZ 10/20

-------------------------------------------------------------------

- UHF SETTING -

-------------------------------------------------------------------

D13 D14 D15

0 0 0 NO WORK

0 0 1 430-440 MHZ 12/25

0 1 0 430-450 MHZ 12/25

0 1 1 430-440 MHZ 5/10

1 0 0 *NORMAL* AS SHIPPED

1 0 1 430-440 MHZ 12/25

1 1 0 430-440 MHZ 12/25

1 1 1 430-450 MHZ 5/10

******************* MORE MODS

FT-2700RH cross band repeater modification.

I have been asked a couple of times to send the mod I devised to use this

rig in cross-band repeater mode. I've always been a bit reluctant cuz it is

not a "cut this trace" or "remove this jumper" type of mod. It is not for

the faint at heart HI. It works quite well indeed, though. So here it goes.

Making the modification:

Use care, and take your time. This is not an easy one!

Encapsulate both modules in isolating material - I used electric tape.

Make good connections.

Before you apply power to test the mod, ensure the "dim" button is

released. Turn the radio on. Test it to see it works just as before.

Nothing should have changed except for the "dim" button.

Using the mod:

Say you want to cross-link 146.52 simplex to a UHF repeater on 442.00+.

1. Program memory channel #1: 146.52 rx, 447.00 tx, full duplex (consult

your manual if necessary on how to do that).

2. Program memory channel #2: 442.00 rx, 146.52 tx, full duplex.

3. Lock out all other memory channels so they will not scan.

4. Select either memory #1 or #2 - doesn't matter.

5. Push "dim" button in. This button has become the RPT ON/OFF switch.

Testing:

You should see the 2700 scanning between channels #1 and #2 at a rate of

about 3 cps. Open the squelch and you should see the tx coming on the

air. Close the squelch and scanning should resume. Note that the rx

volume control has no effect on audio level going out on the air.

Now the pot VR1 will need to be adjusted. There are 3 ways of doing that:

1. Use reports from other stations

2. Better than that, use the old VU METER trick.

3. Best, use a deviation monitor.

MODULE "A" ³

NOTE #3 ³ [X]

ÄÄÄÄÄÄÄÄÄÄÄÙ Q1 ³ VHF UNIT

VHF UNIT ÚÄÄCÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄ>J04 (SEE NOTE #1)

J04 <ÄÄÄÄÄÄR1ÄÄÄÄÄÄÂÄÄBÄ´ PIN #3

PIN #6 ³ À<ÄEÄ¿

R2 ³

³ ³

ÚÄijÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄ¿

K1 ³ K2

CNTL UNIT ÀÄÄÁÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÙ

JP01 <ÄÄÄÄÄÄÄÄoÄÄÄÄ ³ ÄÄÄÄÄoÄÄÄÄÄÄÄÄÄVR1ÄÄÄÄÄÄ NC

PIN #3 ÀÄÄÄ¿ ³ ÚÄÄÄÙ ³

³ ³ ³ C1

ÚÄÁÄ¿ ³ ³ ³ PLL UNIT

GND ³ ³ ÀÄÄÄÄÄÄÄÄÄÄÄ>J03

VHF UNIT ³ ³ VHF UNIT PIN #2

J02 <ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ÀÄÄÄÄÄÄÄÄÄÄ>J02

PIN #7 ³ PIN #4

- - - - - - - - - - - - - - - -³- - - - - - - - - - - - - - - - - - - - - - - -

MODULE "B" ³ ÚÄÄÄ´

NOTE #3 ³ ³ ³

ÄÄÄÄÄÄÄÄÄÄÄÙ ³ R3

³ ÃÄÄÄÄÄÄR4ÄÄÄÄÄÄ¿

³ ³ ÚÄÄÄÄÄÄÄÄÄÄ´

³ ³ ³ ³

ÚÄÄÅÄÄÄÅÄÄÄÅÄÄÄÂÄÄ¿ ³

U1 ³ 8 7 6 5 ³ ³

SEE NOTE #2 ³ 1 2 3 4 ³ ³

ÀÄÄÅÄÄÄÅÄÄÄÅÄÄÄÁÄÄÙ ³

³ ÃÄÄijÄÄÄÄÄÄÄÄÄÄÙ

[X] <ÄÄÄÄÄÄÄÄÄÄÙ ³ ³ CNTL UNIT

C2 ÀÄÄÄÄÄÄÄÄÄÄÄÄÄ´<ÃÄÄÄÄÄÄ>JP01

³ D1 PIN #5

ÚÄÁÄ¿

GND

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Note #1:

Cut orange wire coming out from plug.

Solder two wires to orange wire coming from CNTL unit, one each to points

marked [X] on the diagram above.

Solder orange wire from plug, pin 3, to ground for dim display light,

or leave unconnected for bright display light.

Note #2:

Pins #4 and #5 of U1 are No Connection

Note #3:

Both modules are built separately, and encapsulated to prevent shorts

Module "A" is located on top of PA module on VHF board

Module "B" is tucked behind CNTL panel in front of radio.

Components:

R1: 2.2K C1: 0.1 UFD K1 & K2: reed relays,

R2: 3.2K C2: 10 UFD 12V @ 1050 ohms

R3: 47K VR1: 35K pot RS #275-233

R4: 15K D1: 1N914 diode U1: NE555

Q1: 2N3638A or equivalent



From: N8FNR@WB8H.#SEMI.MI.USA.NA

If you use the Yaesu FT-2400 for packet you may want to do this VERY simple

mod to disable the display light.

If you are using the Yaesu Packet Interface Cable, just connect the unused

black and white wires together. Doing this disables the display light. Simple

eh?

If you are using your own cable connect pins 2 an 6 together to get the

same effect. Pin 2 is "RX audio" and pin 6 is "no connection".

Have fun with this GREAT radio.

73 Zack Schindler, N8FNR, 413 Vester, Ferndale MI, 48220



To : MODS@WW

Type/status : B$

Date/time : 06-Jan 11:30

BID (MID) : 19553_

Message # : 252961

Title

YAESU FT-33R

EXPANDED RF & ALIGNMENT CONTROLS

1. Remove Battery and Antenn

2. Remove control knobs, screws,top panel, battery mounting

track & body screws and open Radio

3. For display 220-550 MHz Pads 7,8 and 9 are o

p For display 50-300 MHz Pads 8 and 9 are open and 7 is brid

ge

4. Reassemble radi1)

From : F5PBG

To : MODS@WW

Type/status : B$

Date/time : 06-Jan 11:30

BID (MID) : 19552_

Message # : 252962

Title : Expanded RF : FL7000

From:

YAESU FL-7000

EXPANDED RF 24.5 Mhz & 28.0

Mhz Band

1 Remove Power cable and all other cables.

2 Remove 4 screws from the top cover.

3 Remove the top cover and the right and

left panels.

4. Remove 4 screws from the power combiner unit and remove

screen plate.

5. locate Switch SO1 on the CPU unit and set it to the off po

sition.

( A small screwdriver can be used to reach the switch.)

6 Reassemble the unit.

From : F5PBG

To : MODS@WW

Type/status : B$

Date/time : 06-Jan 11:30

BID (MID) : 19554_

Message # : 252963

Title : Expanded RF : FT23

YAESU FT-23R

EXPANDED RF & ALIGNMENT CONTROLS

1. Remove Battery and

Antenna.

2. Remove control knobs. screws,top panel, battery mounting

track & body screws and open Radio

3. Remove solder bridge from Pad

# 7

4. Reassemble radio

Range RX 140 MHz -- 163.995 MHz

TX 140 MHz -- 163.995 MHZFrom : F5PBG

To : MODS@WW

Type/status : B$

Date/time : 06-Jan 11:30

BID (MID) : 19551_

Message # : 252964

Title : Expanded RF YAESU

FT212

EXPANDED RF Auto Repeater offset is lost

1. Unplug the DC power cable from the radiO

2. Remove the top and bottom covers.

3 Remove the speaker.

4. Remove the knobs and nuts from the front panel.

5. Remove the three screws from the control unit.

6. Remove the Control unit from the front panel.

7. Locate & remove solder from pad #1 on control unit.

8. Locate & solder jumper Pads 3,4,11 and 14.

9. Replace the control unit on the front panel.

10. Reset the microprocessor. (using a jumper short D09 on the control unit

to ground on the radio. Do not apply power).

11. Reassemble the radio. Replace knobs, screws etc.

12. Apply DC power and turn radio on.

13. Press [MHz] & use the control knob to enter 140 and press [D/MR]. (lower

limit)

14. Press [MHz] and use knob to enter 174 and press [D/MR]. (upper limit)

15. Press [F] and then [RPT] button. use the control knob to enter 0.600.

Press the [RPT] button

Note: New range 140 - 164 MHz

YAESU FT-23R EXTENDED FREQUENCY RANGE:

'Circumcising' the FT-23R is remarkably simple. Removing one solder

blob (pad #7, clearly marked, 10 o'clock position from the speaker, 9

o'clock from the microprocessor) lets the radio receive and transmit

from 140.0 to 163.995 MHz. The two circuit boards with surface-mount

components are uncluttered. When opening the radio, be careful not to

lose the tiny coil-spring inside the battery-release button. I

haven't measured receiver sensitivity, nor do I know about performance

in big-city RFI; the FT-23R is considerably more sensitive at 162-MHz

weather frequencies than is my modified Icom IC-02AT.

********* MORE MOD INFO

Instructions on modifying the Yaesu FT-23R 2M handheld radio for operation in

the Civi Air Patrol service.

* * * * * * * * * * * * * * W A R N I N G * * * * * * * * * * * * * * *

This radio is NOT type accepted other to show Part 15 compliance. Operation in

any service requiring the use of type accepted equipment is in violation of FCC

regulations.

NOTE: BE CAREFUL NOT TO LOSE THE SPRING IN THE BATTERY CONNECTOR!!! IT WILL

TAKE YOU FOREVER TO FIND IT!

1) Remove the 3 screws from the top of the radio.

2) Remove the dial knob

3) Remove the 2 screws from the back of the radio.

4) Remove the battery

5) Remove the 6 screws on the bottom of the radio, where the battery attaches.

6) CAREFULLY remove the front of the radio.

7) To the left of the microprocessor and battery are several printed

circuit pads. The pair labeled 7 will have a blob of solder across them.

Using a small soldering iron and solder wicking, remove the blob of solder.

8) Re-assemble the radio in the reverse order of these steps.

9) The Microprocessor will PROBABLY reset all the memory contents.

10) Operation of the radio remains the same, except that the transmit and

receive coverage will now extend from 140.000 Mhz to 164.000 MHZ.

************* ANOTHER MODIFICATION ************

THE YAESU FT-23R HT MAY BE MODIFIED TO RECEIVE(AND TRANSMIT) FROM

140MHz to 164MHz. TO DO SO, REMOVE THE SOLDER BRIDGE MARKED "7".

IT IS NEXT TO THE LCD DISPLAY INSIDE.

JEFF SPIRKO N3GOB

***************** MORE INFO

The uP's in the FT-23R and the FT-211R/H can be set for several

frequency and memory mode combinations. These modes are contorlled

by the jumpers (solder pads) marked 7,8 and 9 on the processor

board of either radio. Here's a list of what can be done:

JUMPER CONFIG DISPLAY MODE

7 8 9 NUMBER

open open in 1 140 to 164 MHz, amateur mode

open in in 2 140 to 160 MHZ, amateur mode

in open in 3 144 to 148 MHz, amateur mode

in in in 4 144 to 146 MHz, amateur mode

open open open 5 220 to 550 MHz, commercial mode

open in open 6 440 to 450 MHz, amateur mode

in open in 7 50 to 300 MHz, commercial mode

in in open 8 430 to 440 MHz, amateur mode

Both of my radios (USA) were shipped from the factory in config #3.

They can be converted to config #1 without re-tuning just by changing

the jumpers. Tuning range can be further expanded by changing to

jumper config #7. The FT-211 has separate VCO's for transmit and receive

and will lock over about 38 MHz from approx. 130 to 180 MHz. The FT-23

has only one VCO and the overlapping lock range (Xmt & Rcv) is about

25 MHz from approx. 135 to 175 MHz. Don't forget, if you adjust the

VCO you must re-align every electronically tuned stage in the front

end of the radio. The transmitters can be tuned for somewhat higher

power output above 164 MHz but at a great power loss at 2m.

The commercial memory mode will cause these functional changes:

1.When in the MR mode, the channel number will be displayed instead

of frequency. You can toggle back to the original "amateur" mode

display by pressing F<up-arrow>. Pressing F<down arrow> takes you

back to commercial mode. However, when switching from D to MR, the

display will always revert to the commercial mode.

2.The function of the Dot<Pri> button will be exactly reversed. That

means now you can press just one button (Dot) to get into or out

of the Primary function. The Pri funtion (in memory mode) will

be indicated by a large "P" on the left side of the display.

3.The only indication of low power operation is in the memory mode.

A "C" will appear in the upper left corner of the display (where

the primary "P" used to be). The bargraph will always read 100%.

4.The band scan is now even more useless. The uP will painfully

count from 50 to 300 MHz.

I have been able to modify my FT-211RH to scan at about 10 chan/sec

by speeding up the uP clock. This also speeds up every other uP

function by x5, so you have to be fast on the "F" key. No squelch

sensitivity or synthesizer lock-up problems have been encountered

with this modification while scanning.

Basically, I replaced the 800 KHz ceramic resonater (pn CSB800K)

with a Radio Shack 3.58 MHz color burst crystal. The resonater is

located on a small (2.5 sq cm) sub-board that is stuck with double

sided tape to the radio's processer board. This sub-board is actually

an outboard clock for the uP. The schematic I got with the radio

showed the uP's internal osc. being used - so I don't know if my

version differs from newer radios. This mod works fine untill you

turn the radio off and then back on again. A startup glitch then wipes

out all of the memories. To delay the oscillator start up, I added a

220uF 10V electrolytic cap between the red wire on the sub-board

and ground. Positive goes to the red wire. A convenient ground is the

bare wire located diagonally across from the red wire (on the sub-bd).

So far I have been unsuccessful with this mod on the FT-23R H-T.

Since it uses the uP's on board osc, there seems to be no way to

delay it's startup. Every time you turn on the power the uP resets.

If anyone can solve this problem I would be very interested in

hearing from you!

These are not intended to be step by step instructions. Also, you

will want to have a service manual before you begin. If you're not

familiar around surface mount components you may want to "learn"

on something with cheaper consequences. Finally, don't adjust the

VCO's unless you are familiar with how a synthesized radio

works. Use your own judgement!



**************************

9600 BPS with Yaesu FT-211RH

----------------------------

RX AUDIO:

---------

On the RX "IF UNIT" (sub board F2869104) connect the screened lead inner to

the TK10420 IC pin 9 with the outerscreen to pin 15. Caution should be taken to

solder these if soldered to the underside of the board.

TX AUDIO:

---------

On the rear of the "MAIN UNIT", a small potentiometer will be seen (peak devia-

-tion adjust.). Unsolder the leg nearest to the rear of the set, and connect

the inner of the screened TX leads to this point, the outer to the earth plane

adjacent to this point. To ensure that the 9600 bauds modem is terminated in

the required impedance, it is essential that a suitable terminating resistor be

placed across the screened lead inner/outer (a 560 ohm resistor); this may

usefully be done at the FT-211RH potentiometer connection.

No further adjustments need to be made to the radio. On the tested modem a

suitable level of 2.5 kHz deviation was achieved with one third rotation clock-

-wise of the modem TX AF level potentiometer.

YAESU FT-23R case disassembly:

------------------------------

1) Remove the black screws from the top panel of the radio.

2) Remove the knobs.

3) Remove the black screws from the rear panel of the radio.

4) Remove the battery.

5) Remove the 6 screws on the bottom of the radio, where the battery attaches.

6) CAREFULLY remove the front panel of the radio.

7) In the left of the microprocessor and battery are several printed circuit

jumpers. The jumpers labeled 7, 8 and 9 are for the frequencie mods, like

explained in the following.

8) Re-assemble the radio in the reverse order of these steps.

9) The Microprocessor will loose all what the memory contains.

YAESU FT211/23/73 band mods:

----------------------------

The uP's in the FT-23/73 and the FT-211 can be set for many frequency and

memory mode combinations. These modes are controled by the jumpers (solder

pads) marked 7,8 and 9 on the "CONTROL UNIT" board of either radio. Here is a

list of what is possible:

JUMPER FREQUENCIES

7 8 9 COVERED

open open in 140 to 164 MHZ

open in in 140 to 160 MHZ

in open in 144 to 148 MHZ

in in in 144 to 146 MHZ

open open open 220 to 550 MHZ

open in open 440 to 450 MHZ

in open in 50 to 300 MHZ

in in open 430 to 440 MHZ

The FT-211 has separate VCO's for transmit and receive and will lock over about

38 MHZ from approx. 130 to 180 MHZ. The FT-23 has only one VCO and the overlap-

-ping lock range (Xmt & Rcv) is about 25 MHZ from approx. 135 to 175 MHZ. Don't

forget, if you adjust the VCO you must realign every electronically tuned stage

in the front-end of the radio. The transmitters can be tuned for somewhat

higher power output above 164 MHz but at a great power loss at 2m.

The non-amateur (commercial) memory mode will cause these functions changes:

1.When in the MR mode, the channel number will be displayed instead of fre-

-quency. You can toggle back to the original "amateur" mode display by pres-

-sing F<up-arrow>. Pressing F<down arrow> bring you back to commercial mode.

However, when switching from D to MR, the display will always revert to the

commercial mode.

2.The function of the Dot<Pri> button will be exactly reversed. That means now

you can press just one button (Dot) to get into or out of the Primary function

The Pri funtion (in memory mode) will be indicated by a large "P" on the left

side of the display.

3.The only indication of low power operation is in the memory mode. A "C" will

appear in the upper left corner of the display (where the primary "P" used to

be). The bargraph will always read 100%.

4.The band scan is now even more useless. The uP will painfully count from 50

to 300 MHz.

FT23/73 in packet-radio:

------------------------

If you want to work in packet-radio, open jumper 10 to dissable the battery

save.

73's de Phil, F1LOU @ ON7RC.BT.BEL.EU

======================================================================

Note: I haven't tried or verified this, proceed at your own risk. And

DO NOT transmit outside of legal bands! WA2ISE

*** downloaded from Internet by Peter, [email protected] ***

FT 212RH extended freq. coverage mod.

Remove the bottom and top covers and remove the front panel cover. You

must then remove the front board by carefully unpluging it (try not to

touch the lcd display). On the back of this board which is the control

unit locate jumpers 1 through 12 and unsolder any that are soldered. All

jumpers must be open (1-12 only). Reinstall the control unit and just

turn on the radio for a few seconds. now turn it off again and remove

the control unit again and solder jumpers 3, 4, 5, 11 only.

Put everything back together and apply power. The display will read 000.

Push the MHz button and rotate the main dial until 132.000 reads on the

display, then press D/MR once. Now press again the MHz button and rotate

to 180.000 and press the D/MR again.

the radio is now programmed to operate from 132 to 180 mhz. mine has tx

and rx through the entire spectrum with excellent sensitivity from 136

to 178. Dont forget that transmitting outside the amateur band is not

allowed so please consult your local athorities for a special permit.



To : YAESU@WW

Type/status : B$

Date/time : 13-Oct 15:07

BID (MID) : AA7LX0PAC01I

Message # : 237569

Title : FT212-FT712 mods !

FT 212RH extended freq. coverage mod.

-------------------------------------

Remove the bottom and top covers and remove the front panel cover. You must

then remove the front board by carefully unpluging it (try not to touch the lcd

display). On the back of this board which is the "CONTROL UNIT", locate jumpers

1 through 12 and unsolder any that are soldered. All jumpers must be open

(1-12 only). Reinstall the control unit and just turn on the radio for a few

seconds. Now turn it off again and remove the control unit again and solder

jumpers 3, 4, 5 and 11 only. Put everything back together and apply power. The

display will now read 000. Push the MHz button and rotate the main dial until

140.000 is read on the display, then press D/MR once. Now press again the MHZ

button and rotate the main dial to 174.000 and press the D/MR again. The radio

is now programmed to operate from 140 to 174 MHZ.

===============================================================================

FT-712 UN/MOD:

--------------

From: DA2GY @ DB0SIF.DEU.EU

The following is the modification for expanded RF for the FT-712RH.

If your radio has already been modified use this modification in

a reverse order to remove the modification.

1. Unplug all power and antenna.

2. Remove the top and bottom covers.

3. Remove the speaker.

4. Remove the knobs and nuts from the front panel.

5. Remove the three screws from the control unit.

6. Remove the control unit from the front panel.

7. Remove solder from pad #1 and pad #2 on the control unit.

8. Solder jumper pads 4 and 14. Pads 3,4,5,7,11 and 14 will be

bridged.

9. Replace the control unit onto the front panel.

10.Reset the microprocessor.(using a jumper short D09 on the control

unit to ground on the radio. Do not apply power).

11.Reassemble the radio.

12.Apply DC power and turn on the radio.

13.Press [MR] and use the control knob to enter 430 and press [D/MR].

(lower limit)

14.Press [MR] and use knob to enter 501 and press [D/MR].(upper limit)

15.Press [F] and then [RPT] button.Use the control knob to enter 5.000.

Press the [RPT] button.

The following is a view of the control unit with placement of the

jumper pads.

==========================================================

==============================

(-) (-)14 ==============================

I===============I

I I 7

6

I I 11(-) (-) (-)

I I (-) (-) (-) (-)

I I (-)4

I===============I (-)3

(-)1

(-)2

==========================================================

--- End of messsage #237569 to YAESU from LX2SK ---

************************

From : F5PBG

To : MODS@EU

Type/status : B$

Date/time : 22-Sep 11:39

BID (MID) : 14579_NODE29

Message # : 233503

Title : >> FT 5100 <<

PROGRAMMING INFORMATION and COMPLETE MODIFICATION

Expanded RF 128-180 Mhz *** 420-475 Mhz X-Band repeater mod & MIC band change

1- Remove power and antenna.

2- Remove 6 screws from top and bottom covers (Remove the covers WATCH speaker

3- Remove the 2 silver screws from each side of the radio securing the control

head.

4- Carefully pull the control head from the radio.DO NOT REMOVE RIBBOM CABLES.

5- Locate and remove chip resistor R-4072. ( RX mod.)

6- Locate and remove chip registor R-4067. ( Mic/band mod).

7- Locate and install jumpers in position R-4070 R-4068 R-4064. ( RX mod )

Note: On the circuit has no numbers use the draw below to locate chip position

STOCK US JUMPERS: 4001, 4003, 4004, 4051, 4061, 4062, 4067, 4072.

STOCK MOD JUMPERS: 4001, 4003, 4004, 4051, 4061, 4062, 4064, 4068, 4070.

8- Reassemble the radio.

9- Proceed to the next after draw

J-4002 J-4001

ÚÄÄÄÄÄÄÄÄÄÄÄÃÃÃÃÃÃÃÄÄÄÄÄÄÄÄÃÃÃÃÃÃÃÃÄÄÄ¿

³ ßßßßßßß ßßßßßßßß ³

³ ÛÛÛÛ şşşş ³

³ şşşşşşşşşşşş şşş ³

³ ³

³ Rear view of control Head ³ <ÄÄÄÄÄÄÄÄÄÄÄ¿ZOOM

ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ³

³

R R R R R R R R R R R R R R R ³

ÚÄÄÄÄÄÄÄÄÄÄÄÄÄ4ÄÄ4Ä4Ä4Ä4Ä4Ä4Ä4Ä4Ä4Ä4Ä4ÄÄÄ4Ä4Ä4ÄÄÄÄÄÄÄÁÄÄÄÄÄ¿

³ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ³

³ Û Û Û Û Û 6 6 6 6 6 6 6 6 6 7 7 7 0 0 0 ³

³ 1 2 3 4 5 6 7 8 9 0 1 2 1 3 4 ³

³ Û Û Û Û Û Û Û Û Û Û Û Û Û Û Û Û ³

³ R ³

³ 4051 ³

ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ

INITIAL PROGRAMMING INFORMATION *** MUST DO FOR COMPLETE MODIFICATION

9- Press and hold [D/MR], [F/W] and [REV] and turn power ON.

(The display will show 300.000 and 20.000)

10- Press [MHZ] and dial 420.00 amd press [D/MR] -- UHF RX Low limit

11- Press [MHZ] and dial 475.00 and : : -- UHF RX Hi limit

12- Press [MHZ] and dial 420.00 and : : -- UHF TX Low limit

13- Press [MHZ] and dial 475.00 and : : -- UHF TX Hi limit

14- Press [MHZ] and dial 128.00 and : : -- VHF RX Low limit

15- Press [MHZ] and dial 180.00 and : : -- VHF RX Hi limit

16- Press [MHZ] and dial 128.00 and : : -- VHF TX Low limit

17- Press [MHZ] and dial 180.00 and : : -- VHF TX Hi limit

18- Press [F/W] then [RPT] and dial 5.000 and press [RPT] - UHF offset.

19- Press [F/W] then [REV] anddial 25.0 and press [RPT] - channel Step.

20- Press [BAND] then [F/W] then [RPT] and dial 0.600 and press [RPT]

VHF offset.

* * * *

SOFT RESET (Memory clear) - Press and hold [D/MR] and [REV] and turn radio ON

CROSS BAND REPEATER OPERATION

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

TURN ON : Press and hold [RPT] and turn radio ON.

TURN OFF: Press and hold [RPT] and turn radio ON.

EXTRA Modification: Remove solder from jumper R-4067 to make Microphone

[D/MR] buttom switch band on the radio.

ALIGNMENT CONTROLS:

~~~~~~~~~~~~~~~~~~

VR-1003 UHF TX OUTPUT VR-1002 UHF AFP

VR-1001 UHF AFP VR-1006 VHF Deviation

VR-1007 UHF Deviation VR-101 VHF AFP

VR-1004 UHF Scnanner center VR-406 UHF S-Meter

VR-402 UHF SQLs present VR-102 VHF TX OUTPUT

VR-103 VHF AFP VR-401 VHF SQLs present

VR-405 VHF S-Meter VR-402 VHF Scanner center

VR-404 UHF Scanner center-Stop TP-403 UHF Scanner center-Stop test

TP-401 VHF Scanner cent test TP-402 VHF Scanner cent-Stop test

All mods are captured by packet.

This BBS takes no responsibility or

liability for any damege resulting

from this modification.

--- End of messsage #233503 to MODS from F5PBG ---

Subject: 9600 BPS with Yaesu FT-211RH

- - - EVEN MORE NEWS FROM ACROSS THE POND - - -

From: RADio COMmunications, Radio Society of Great Britain, February, 1990

Page 60. Copyright 1990, RSGB, Reprinted by permission.

DATACOMMS - Edited by Neil Lasher, G6HIU

9600 BAUD MOD OF THE MONTH

This month the modification is for the Yaesu FT-211-RH. Thanks for it are

due to Chris Lorek from SMC.

The FT-211RH has been shown to be suitable for 9600 baud packet operation.

There is no major surgery required just two screened leads are required, one

for TX AF the other for RX AF connected as follows:

RX AUDIO

On the RX IF Unit (sub board F2869104) connect the screened lead inner to

the TK10420 IC pin 9 with the outerscreen to pin 15. Caution should be

taken to solder these if soldered to the underside of the board.

TX AUDIO

On the rear of the main PCB a small potentiometer will be seen (peak

deviation adjuster). Unsolder the leg nearest to the rear of the set, and

connect the inner of the screened TX leads to this point, the outer to the

earth plane adjacent to this point. To ensure that the 9600 baud modem is

terminated in the required impedance, it is essential that a suitable

terminating resistor be placed across the screened lead inner/outer, eg a

560 ohm resister; this may usefully be done at the FT-211RH potentiometer

connection.

No further adjustments need to be made to the radio. On the tested modem a

suitable level of 2.5 kHz deviation was achieved with one third rotation

clockwise of the modem TX AF level potentiometer.

**************************

Subject: FT211, FT23 mods

The uP's in the FT-23R and the FT-211R/H can be set for several

frequency and memory mode combinations. These modes are contorlled

by the jumpers (solder pads) marked 7,8 and 9 on the processor

board of either radio. Here's a list of what can be done:

JUMPER CONFIG DISPLAY MODE

7 8 9 NUMBER

open open in 1 140 to 164 MHz, amateur mode

open in in 2 140 to 160 MHZ, amateur mode

in open in 3 144 to 148 MHz, amateur mode

in in in 4 144 to 146 MHz, amateur mode

open open open 5 220 to 550 MHz, commercial mode

open in open 6 440 to 450 MHz, amateur mode

in open in 7 50 to 300 MHz, commercial mode

in in open 8 430 to 440 MHz, amateur mode

Both of my radios (USA) were shipped from the factory in config #3.

They can be converted to config #1 without re-tuning just by changing

the jumpers. Tuning range can be further expanded by changing to

jumper config #7. The FT-211 has separate VCO's for transmit and receive

and will lock over about 38 MHz from approx. 130 to 180 MHz. The FT-23

has only one VCO and the overlapping lock range (Xmt & Rcv) is about

25 MHz from approx. 135 to 175 MHz. Don't forget, if you adjust the

VCO you must re-align every electronically tuned stage in the front

end of the radio. The transmitters can be tuned for somewhat higher

power output above 164 MHz but at a great power loss at 2m.

The commercial memory mode will cause these functional changes:

1.When in the MR mode, the channel number will be displayed instead

of frequency. You can toggle back to the original "amateur" mode

display by pressing F<up-arrow>. Pressing F<down arrow> takes you

back to commercial mode. However, when switching from D to MR, the

display will always revert to the commercial mode.

2.The function of the Dot<Pri> button will be exactly reversed. That

means now you can press just one button (Dot) to get into or out

of the Primary function. The Pri funtion (in memory mode) will

be indicated by a large "P" on the left side of the display.

3.The only indication of low power operation is in the memory mode.

A "C" will appear in the upper left corner of the display (where

the primary "P" used to be). The bargraph will always read 100%.

4.The band scan is now even more useless. The uP will painfully

count from 50 to 300 MHz.

I have been able to modify my FT-211RH to scan at about 10 chan/sec

by speeding up the uP clock. This also speeds up every other uP

function by x5, so you have to be fast on the "F" key. No squelch

sensitivity or synthesizer lock-up problems have been encountered

with this modification while scanning.

Basically, I replaced the 800 KHz ceramic resonater (pn CSB800K)

with a Radio Shack 3.58 MHz color burst crystal. The resonater is

located on a small (2.5 sq cm) sub-board that is stuck with double

sided tape to the radio's processer board. This sub-board is actually

an outboard clock for the uP. The schematic I got with the radio

showed the uP's internal osc. being used - so I don't know if my

version differs from newer radios. This mod works fine untill you

turn the radio off and then back on again. A startup glitch then wipes

out all of the memories. To delay the oscillator start up, I added a

220uF 10V electrolytic cap between the red wire on the sub-board

and ground. Positive goes to the red wire. A convenient ground is the

bare wire located diagonally across from the red wire (on the sub-bd).

So far I have been unsuccessful with this mod on the FT-23R H-T.

Since it uses the uP's on board osc, there seems to be no way to

delay it's startup. Every time you turn on the power the uP resets.

If anyone can solve this problem I would be very interested in

hearing from you!

These are not intended to be step by step instructions. Also, you

will want to have a service manual before you begin. If you're not

familiar around surface mount components you may want to "learn"

on something with cheaper consequences. Finally, don't adjust the

VCO's unless you are familiar with how a synthesized radio

works. Use your own judgement!



FT 209 R /FT 209 RH Modification

It is possible to activate any 10 MHz segment between 130 and 160 MHz on the

FT 209 Handy from Yaesu. First you have to solder in the bridge 7 on the

control unit board ( pcb with the keypad ). Now after a reset the display

shows you "0000" with the first digt flashing and you have to enter

the receiving low, receiving high, transmitting low and transmitting high

frequency (only the first 4 digits !). For example :

If you wish a receiving segment from 142.500 to 151.800 and a transmitting

segment from 144.000 to 146.000 MHz you must enter the follwing after the

reset :

1 4 2 5 D

1 5 1 8 D

1 4 4 0 D

1 4 6 0 D

Finaly you must programm the repeater shift. The shift is n o t set to

600 kHz. Enter 0 6 0 0 F shift. That's all !

The PLL locks only between 138 - 152 MHz successfully and transmitter

works only between 140 - 149 MHz. If you want to use other frequencies

you must realign the rig.

***************** M O R E I N F O ********************

********************************************************

Subject: FT-209RH mods resolved

Some time ago I had tried the FT-209 mods as published in the Dec. '87

73 magazine. It hadn't worked correctly, and someone on the net verified

that the jumpers listed weren't correct, but they'd forgotten the correct

jumpers. Well I finally got around to doing the mod, and here are the

results.

The magazine article says to jump pins 1, 7, 9, 10, 11, 13, and 16.

In every 209RH I've opened, pins 1, 9, and 13 are already jumped.

Adding jumpers 7, 10, 11 and 16 allows "out-of-band" transmission.

But the receiver becomes thoroughly confused, and is not tunable.

The solution: DON'T jump 11 and 16.

So the final steps are:

1) Add jumpers to 7 and 10.

2) Give the VCO can a 1/2 turn clockwise if you're moving to higher freqs.

3) Reset radio and reprogram rcv and xmit freqs, and rptr offset.



From: KA8WPC@KF8OW.#NWOH.OH.USA.NA

YAESU FT-11R AND FT-41R SQUELCH FIX

If you are having a problem with the ht's squelch not setting right,

the following is a mod to put the unit into adjustment mode from the

keypad. BE CAREFUL! this mod has not been fully tested yet.

It will however cure the problem of the squelch opening when no signal

is present.

1. HOLD DOWN (CALL)(VOL UP)(VOL DWN) AT THE SAME TIME, AND PUSH THE

POWER SWITCH. THE DISPLAY WILL READ "S FULL"

2. PRESS (MHZ UP) 3 TIMES UNTIL "SQU TI" IS DISPLAYED

3. INJECT A .4uv SIGNAL AT THE ANTENNA INPUT. (THE FREQ SHOULD BE WHAT

WAS DISPLAYED BEFORE ENTERING THE ADJUSTMENT MODE.)

4. PRESS (FM) FOR 1/2 SECOND. "AD" WILL BE BLINKING IN THE UPPER LEFT

HAND CORNER.

5. PRESS (MR) AND THE BLINKING "AD" WILL STOP.

6. PRESS (CALL) FOR 1/2 SECOND, AND IT WRITES THE INFORMATION INTO

THE EEPROM, AND RETURNS THE DISPLAY TO THE ORIGINAL OPERATING MODE.

I say again, I don't know what the other functions are as of yet.

but if you are having difficulty with the squelch settings, try this.

It comes directly from YAESU.

thanks es 73, -=MIKE=-

EOF DE KA8WPC@KF8OW.#NWOH.OH.USA.NA



************************************

REPLACING FINALS IN FT101E TRANSCEIVERS

There will come a time when the finals in your

FT101E will need replacing. These transceivers were

originally equipped with 6JS6C tubes manufactured by NEC.

This tube's properties are slightly different from the 6JS6C

tubes available today from American tube manufacturers. By

the way, don't bother looking for tubes made by NEC. They

got out of the business several years ago.

In order to use the "American" variety 6JS6's, a

simple modification to the neutralization circuit must be

made to the final section of the transceiver.

The modification consists of replacing the fixed

value 100 pf 1000 VDC mica capacitor with a 10 pf 1000 VDC

mica capacitor. This capacitor, C125, is in series with the

10 pf variable neutralizing capacitor off of the plate

circuit.

If this modification has not already been completed

on your rig, be sure to use a mica or silver mica of at

least 1000 VDC. Do not substitute a different type, because

the heat in the final compartment will change the value, and

your tubes will fail prematurely. Also, be very careful to

keep all leads short and in exactly the same orientation as

the original capacitor.

Before reneutralizing, open the variable

neutralizing capacitor all the way to minimum engagement and

follow the neutralizing instructions in the manual. While

dipping the plate, remember to adjust the neutralizing

capacitor for equal value meter reading peaks (IC position)

on both sides of the dip when tuning the "Plate" control.

************* MORE MODS

Converting 11 Meter band to 12 Meters for the Yaesu FT 101 series

Although this procedure hardly qualifies as a "mod" (too easy), it is

certainly useful for the FT 101 series owner. Conversion to the 12 meter

WARC band is as simple as replacing a crystal. The 11 meter xtal is

replaced with a 30.52 Mhz 3rd overtone xtal in a HC-25/U holder as

specified in the FT 101 series maintenance manual. No other

modifications are necessary as the new band is close enough to the

original that the current components work. To replace the xtal, remove

the top cover and find the xtal board located at right front of the rig.

Xtals marked xxxx are standard while oooo are optional on some

units. X5, for the 11m, band is an option and may or may not be installed.

10B xxxx xxxx 80

10C xxxx xxxx 40

JJY/WWV (1) xxxx xxxx 20

160 oooo xxxx 15

xxxx oooo < X5 the "11 meter" socket

.... xxxx 10A

The xtal was ordered from Marden Electronics (800-222-6093) although it

is probably available from the other companies which offer this type of

item. I'll skip the business details here, but it is cheap. I found fat

fingers a hindrance when yanking the old and insterting the new so I

used a hemostat (narrow nosed locking type device with "seconds" often

found in hardware stores, etc.). After checking with a local ham who

monitored my transmissions to make sure I was where I thought I was, I

was in business with 12 meters for my FT 101B.

How'd it go ?? After warming up the rig, I spun the dial a bit on what

has been a mostly dead band this summer. The first station I heard was a

little weak .. AA5QC .. no it's A35QC. I had no idea where that was, but

I gave him a call. It turned out to be JF1WQC vacationing in TONGA, my

first African contact and a 59 report at that! So here's an easy way to

add a WARC band and open new possibilities for DX adventure with your FT

101 series rig. Please let me know if you have any additional feedback

or comments on what has to be one of the easiest "mods" ever.

(1) This is another story .. note that it is a receive only band for

10 Mhz .. for now. See Page 70 of the Nov 83 issue of 73 Magazine if

you can't wait.



To : YAESU@WW

Type/status : B$

Date/time : 06-Jan 11:32

BID (MID) : 418OE3XPR003

Message # : 253018

Title : FT-8100R Modification info

(This message has been read 2 times so far in this BBS.)

Path: !ZL2TZE!KD4AHQ!WF0A!KC2UA!KB2OBB!KE2VW!WB0TAX!IW0QMN!IK6RUY!I4UKI!

!IV3AVQ!IV3LAV!S50MBL!S50BOX!S50MBR!S50BMS!HA1VH!OE3XPR!OE3XPR!

From: OE6MDF @ OE3XPR.#OE3.AUT.EU (Markus)

To: YAESU @ WW

X-Info: No login password

X-BID: 418OE3XPR003

FT-8100R Modification information:

==================================

ENTER = continue, A = Abort, N = Next, C = cancel paging -->

1.) Remove the upper case

2.) Set the front panel to your side

3.) On the left had side bottom corner near by the 18 pins connector and the

screw, there is a resistor, R1359. Remove R1359 very carefully with

proper soldering iron.

4.) Put back the upper case.

5.) Reset the tranceiver by pressing REV key + VFO/MR key then power ON.

Note: CE Marking is no longer effective after the modification.

Specifications outside the amateur bands is not guaranteed!

ÍÍ» ÍÍÍ» OE6MDF@OE3XPR.#OE3.AUT.EU Op. Markus

vy º Í͹ QTH: Hartberg (Oststmk.) Locator: JN77XG --AUSTRIA-- *EU*

ÄÄÄÄÄ Ê ÍÍͼ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ eof ÄÄÄ

ENTER = continue, A = Abort, N = Next, C = cancel paging -->

--- End of messsage #253018 to YAESU from OE6MDF ---

The range for the 6m unit is therefore 46-56 MHz, and the 2m unit will

give you 140-150 MHz. Yes, the transmitter will also work this span, but

keep in mind a 10 watt signal on the 49 MHz band sticks out like a sore

thumb! ;-) ("Wow! Listen to *that*! He must have a better walkie-talkie

than these RadioShack junkers!") ;-)

My attempts to modify the range on the 430 MHz rf module have not meet

with much success, and a careful look at the schematics/numbers tell the

story quite well; The module covers 430-440, a 10MHz range. Therefore,

the address-line trick will yield no more coverage.

Have Fun, 73! --

-Avatar-> KB6LUY +-------------------------+

%

Note: I haven't tried or verified this, proceed at your own risk!

WA2ISE

And don't transmit outside your licesned bands!

FT736R.2

I bought a Yaesu FT736 about 6 months ago. It's a great radio but one

thing annoyed me about it. When I used in on FO-20 or the microsats with my

TAPR PSK modem, the PSK modem adjusts to the doppler frequency shift by sending

pulses to the up/down buttons on the microphone. Only problem is, everytime it

sent a pulse the radio went BEEP. This beep didn't come thru the speaker,

instead it was emitted from a separate buzzer. As a result, even when using

the headphomes, the beep would disturb the whole house. This was a particular

problem on late night passes. Thanks to a suggestion from WB2IBO and the folks

at Yaesu, I've discovered you can fix the problem.

If you remove the top cover you will find a circuit board right behind the

front panel. As you are facing the front of the radio on the top left corner

you will see capacitor C63 identified on the board with a red wire going into

the circuit board next to it. Clip the red wire and no more beep. You won't

actually see the beeper. To find the beeper you have to remove the top and

bottom covers (see the manual) and then loosen the screws on either side of

the front panel (see section 3.5.4 in the manual). At the bottom left of the

circuit board is the black buzzer, about the size of a quarter. The red wire

you need to clip starts from here. You don't actually have to remove the

bottom cover if you clip it where it goes back into the circuit board on the

top, however.

You could rig up a switch to turn the buzzer off and on, but I don't why

anyone would ever want to turn it back on. 73 de WA0PTV @WA0PTV



FT736R.3

Here are some routines to drive a Yaesu FT736R CAT interface.

Note that the radio has TTL levels, so you need to build a circuit to

convert RS232 voltages to TTL voltages. You can do this with a MAX231 etc,

or a couple of NPN transistors. The latter can be mounted inside your

DB25 connector.

1. The Yaesu spec contains one or two typos which are herein connected.

2. It does not appear to be necessary to space out the 5 control

bytes by 50 ms.

3. The READ S-meter, squelch functions smetimes fail to return all 5

bytes, so the code (FNget) accomodates this.

REM

REM FT736R CAT Interface Drivers

REM ----------------------------

REM Last modified 1990 May 21

REM

REM (C)1990 J R Miller G3RUH

REM

REM Procedures and functions available are:

REM

REM PROCcat(on|off)

REM PROCmode(lsb|usb|cw|cwn|fm|fmn)

REM PROCptt(on|off)

REM PROCsplit(off|plus|minus)

REM PROCoffset(MHz)

REM PROCfreq(MHz) (* e.g. MHz = 145.6789

etc *)

REM PROCfull_dup(on|off)

REM PROCsat_mode(tx|rx , lsb|usb|cw|cwn|fm|fmn)

REM PROCsat_freq(tx|rx , MHz)

REM FNsqlch (* returns 0 if no

signal *)

REM FNmeter (* returns S-meter value

*)

REM

REM

REM Example - prepare FT736R for FUJI-OSCAR-20

satellite

REM

====================================================

PROCset_up: REM Do once only per session!

PROCcat(on)

PROCfull_dup(on)

PROCsat_mode(rx,usb): PROCsat_freq(rx,435.916)

PROCsat_mode(tx,fm ): PROCsat_freq(tx,145.850)

PROCcat(off)

END

:

REM Now follows procedures and functions

:

DEF PROCcat(F%)

IF F%=on B%(5)=0 ELSE B%(5)=&80

PROCput: ENDPROC

:

DEF PROCmode(B%(1))

B%(5)=7: PROCput: ENDPROC

:

DEF PROCptt(F%)

IF F%=on B%(5)=8 ELSE B%(5)=&88

PROCput: ENDPROC

:

DEF PROCsplit(F%)

B%(5)=&89: REM simplex

IF F%=plus B%(5)=&49

IF F%=minus B%(5)=9

PROCput: ENDPROC

:

DEF PROCoffset(F)

B%(5)=&F9

PROCfr(F)

PROCput: ENDPROC

:

DEF PROCfull_dup(F%)

IF F%=on B%(5)=&E ELSE B%(5)=&8E

PROCput: ENDPROC

:

CONT IN FT736R.4

FT736R.4

DEF PROCsat_mode(F%,B%(1))

IF F%=tx B%(5)=&27 ELSE B%(5)=&17

PROCput: ENDPROC

:

DEF PROCfreq(F)

B%(5)=1

PROCfr(F)

PROCput: ENDPROC

:

DEF PROCsat_freq(F%,F)

IF F%=tx B%(5)=&2E ELSE B%(5)=&1E

PROCfr(F)

PROCput: ENDPROC

:

DEF PROCfr(F)

IF F>=1000 FX%=on ELSE FX%=off

F=(F+0.000005)/1000

FOR I%=1 TO 4: F=F*100: F%=INT(F): F=F-F%

B%(I%)=(F% DIV 10)*16 + F% MOD 10

NEXT

IF FX%=on B%(1)=B%(1)AND &F + &C0: REM 1200 MHz band

corrrection

ENDPROC

:

DEF FNsqlch

B%(5)=&E7: PROCput: PROCget

IF B%(1)=0 THEN =0 ELSE= -1

:

DEF FNmeter

B%(5)=&F7: PROCput: PROCget

=B%(1)

:

DEF PROCset_up

REM Establish constants etc

DIM B%(5)

off=0: on=-1

rx =0: tx=-1

plus=+1: minus=-1

lsb=0: usb=1: cw=2: cwn=&82: fm=8: fmn=&88

:

REM Most code after this is for controlling the BBC micro

hardware

REM and needs recoding for any other machine. Note "*FXn,m"

is

REM merely a BBC micro operating system call, no. n, parameter

m.

REM

REM Set up RS423 = 4800,8,N,2

*FX8,6

*FX7,6

*FX156,16,227

ENDPROC

:

DEF PROCput

REM Procedure sends five bytes to RS432c port, spaced by 50ms

REM bytes are in array B%(1) ... B%(5)

FOR I%=1 TO 5

REM Delay below is in the spec, but can actually be omitted

T%=TIME: REPEAT UNTIL TIME >= T%+5: REM Wait 50 ms/byte

REM Now direct output to RS423, o/p char, and restore o/p to

screen

*FX3,3

VDU B%(I%)

*FX3,0

NEXT

ENDPROC

:

DEF PROCget

REM Flush RS423 I/P buffer, then read bytes from input stream

REM until op code is detected. Previous value is result.

REM (straight reading 5 bytes found to be unreliable)

*FX15,1

*FX2,1

REPEAT B%(1)=B%: B%=GET: UNTIL B%=B%(5)

*FX2,0

ENDPROC

:

REM End of code

REM de G3RUH @ GB7SPV 1990 May 29

JAS>



FT736R.5

From: KB2LPW@KB2LPW.#NYC.NY.USA.NA

---------------------- 9600 BAUD RADIO MODS dor the FT726 and FT736------------

Thanks to all who reply to my message address for the FT-736 9600 mod..

My header address was wrong and I in fact was looking for the FT-726 mod..

I found the mod via a phone call to Yaesu and I talk to Chip(K7JA) who put

me in the right direction for the mod..What Chip told me was to tap off

between R-45 + R-96 for the receive end and between R-22 + C-16 for the

transmit end..You well have to change the RX filter to a wider filter

(CFW-455D) which I haven't done as of yet..Since there isn't much 9600 baud

packet on 2mtr in this area I have as of yet been able to check out the modem,

but I have notice an inprovement on the 1200 baud end..Still am testing this

mod out,so I am passing it on as such..Will send the final will tested mod in

a later message..If anyone else has something to add that I may need to do,

please pass it on to me...

Again,thanks to all,

Rick N1HID



FT736R.6

FT736R - VHF Attenuator Mod

A little trick to built in an RX-Attenuator in the FT736R (VHF Band)

Heìlo FT736 fans,

Using a preamp in the VHF Band causes sometimes trouble with noise on

this band. The S-Meter readout 2-4 without any signal. The AGC is

working only to reduce the noise.

A simple trick decrease the sensivity for about 6 dBm.

Look in the schematic-diagramm 144 MHz MAIN-UNIT. The first RX-Stage

is at the left side of the sheet. Locate the transistor Q01 3SK122L

and look at the source-resistor R02 (47 Ohm). A second resistor with

the value 1.2 KOhm in series with R02 decrease the sensivity for 6 dB.

Using the preamp-switch (this switch has a free row) You can easyly

switch between attunation and normal use by making a bridge over the

new 1.2 KOhm Resistor with this contacts.

I think, this trick is not a excellent way of a RX-Attunator, but it

works ufb here in my rig.

By the way, remember of loosing warrenty bù modify Your rig ! I am not

responsable for failures after modification !

Vy 73 de Guenter DD9ZO @ DB0SIF

FT736R.7

Original from G0HEG to MODS@WW

Modification of the PMS on the FT736R

as fonr by G0HEG

Introduction

The following Modifications were found by Trial and error

all these Mods will work,

though not all have been done by me,

there are a number of do'es and don'ts

that should be Followed if you are to successfully complete

these Mods.

1/ Do Not Tounh any Knobs or Buttons other than those

Specified in each of the Mod sheet,

Because you will lose all your hard work.

2/ Follow each instruction to the letter,

these Mods may be long winded but they do work

The object of these Mods are to Extend the Receive on the

FT736R

The list of Mods found by G0HEG & G0TVL For the PMS is not

Complete.

1/ 144 to 146 ( European Version ) See Mod 1 Page 1.

2/ 144 to 148 ( American Version ) See Mod 1 Page 2.

3/ 430 to 440 MHz ( European Version ) See Mod 2.

4/ 440 to 450 MHz ( American Version ) Not written Yet See Mod 2

5/ 50 to 54 MHz. See Mod 3.

6/ 1260 to 1300 MHz ( American Version ) Not written Yet See Mod 4.

7/ 1240 to 1300 MHz ( European Version ) See Mod 4.

8/ 220 to 225 MHz ( American Version ) See Mod 5 for Details

when completed.

I have Tryed to make this as brief as possible,

I only hope that you are able to follow my directions

without to Much Difficulty.

Yours Sincerely

David Watkins

G0HEG

P.S. These Mods can be Removed easily ,

by Turning off the Rigs internal Battery,

or by switching One of the Two switchers in the

top of your Rig to the OFF position.

This is only a list of the Mods that can be done,

for more Infomation Please Contact G0HEG

73,s de G0HEG

FT736R.8

Original from G0HEG to MODS@WW

MODIFICATION OF THE PMS ON THE FT736R FOR 430 MHZ

MOD 2 BY G0HEG

Modification of the PMS on the FT736R for the 430 MHz Band,

Extended coverage on receive from the front panel can be

achieved by means of a few simple but repetitive actions,

The receive can be extended from about 425 MHz to around 459 MHz.

by the use of the Repeater shift,

This gives a coverage of about 34 MHz,

There is no need to snip any of the components,

And you will not need a soldering Iron for this Modification.

Instructions

Make sure that when you start this Mod that you are in VFO A.

Make sure that you put the Highest Frequency in to VFO B,

and the Lowest one in to VFO A.

Be careful not to Touch the UP or Down Scan Buttons

on your RIG Whilst doing these Mods.

Be careful not to Touch the Main Tuning knob

on your RIG Whilst doing these Mods

Please Note Also,

Do not Press any scan Buttons on you FT736R,

Do not Press the Channel Buttons or the Tuning Knob,

Because if you Do Turn the Channel Knob the wrong way,

you will lose all that you have done so far,

What happens is this ( Press the wrong way the RIG will

default back to 4 430 MHz.

Turned the wrong way it will Default Back to 430 MHz

Only Press or Turn Those Knobs Buttons or keys

specified in these Mods.

1/ Turn on your RIG.

2/ Put the RIG into Repeater Shift for the 430 MHz Band,

By pressing the + RPT KEY.

3/ Set the OFFSET to 09.999.9.

4/ Tune the RIG to the Lowest Band edge of 430.000.0 MHz.

5/ Press the REV KEY ( KEY 5 ).

6/ Press the UP MHz Button.

7/ Repeat Steps 5 & 6 Nine Times more,

Alternating Between Both until you get the Frequency

down to 420.000.0 MHz.

8/ Increase the OFFSET to 19.999.9.

9/ Repeat Steps 5 & 6 Ten Times,

Alternating Between both until you get the Frequency

down to 410.000.0 MHz.

10/ Increase the OFFSET to 29.999.9.

11/ Repeat Steps 5 & 6 Ten Times,

until you get down to 400.000.0 MHz.

12/ Increase the OFFSET to 39.999.9.

13/ Repeat Steps 5 & 6 Ten Times,

until you get down to 390.000.0 MHz.

14/ Keep on Increasing the OFFSET by Ten,

and after every Increase in the OFFSET,

Repeat Steps 5 & 6 Ten Times,

Until you get the OFFSET to 99.999.9,

And the Digital Read out to 330.000.0 MHz.

CONT IN FT736R.9

FT736R.9

CONT FROM .8

PAGE 1

STAGE 2

Now that you have got so far it is Important that you

follow the next few moves to the letter.

1/ Press the Function Key Which is Marked with an ( F )

2/ Press the PMS KEY ( KEY 3 ).

You have just stored your New Band Edges in to the PMS,

to check this out simply Press the PMS KEY,

and Press either of the up or down Scan Buttons,

you will find that the RIG will scan up or down either way,

but that Depends on which Button was Pressed first.

Now that you have 330.000.0 MHz in the PMS,

Make sure that you have an OFFSET of 99.999.9. in the PMS,

also Make sure that the Repeater Shift is in the + RPT position.

3/ Tune to the Lowest Frequency in the PMS which should

Now be 330.000.0 MHz.

4/ Press the REV KEY ( KEY 5 ).

5/ Press the UP MHz Button.

6/ Repeat Steps 5 & 6 Alternating Between both until

you get your Digital Readout Down to 230.000.0 MHz.

7/ Press the Magic Number of 9,2,4,9 in that order.

8/ Press the F Key followed by the PMS key.

9/ Press the PMS Key again,

Now tune to the lowest Frequency in the PMS

Which should now be 230.000.0 MHz.

10/ Repeat Steps 5 & 6 Alternating Between both until you get

the Frequency Down to 130.000.0 MHz

11/ Press the Magic Number of 9,2,4,9 in that order.

12/ Press the F Key followed by the PMS Key.

13/ Press the PMS KEY again,

And Tune to the Lowest Frequency in the PMS,

14/ Repeat Steps 5 & 6 Alternating until you get the

Frequency down to 30.000.0 MHz.

15/ Press the Magic Number of 9,2,4,9, in that order.

16/ Press the F KEY followed by the PMS Key.

17/ Press the PMS Key,

Now Tune to the lowest Frequency in the PMS which

should now be 30.000.0 MHz

18/ Repeat Steps 5 & 6 Alternating Between both until

you get the Frequency down to 00.000.0 MHz,

Be careful not to go Passed this Frequency,

Because the RIG will automatically Default Back to

30.000.0 MHz,

And you will have to start again from that point.

19/ Press the Magic Number of 9,2,4,9, in that order.

20/ Press the F Key followed by the PMS Key.

PAGE 2

21/ Press the PMS Key again,

This time Tune slowly across The Two Band edges,

until you see 999.999.9 MHz on your Digital

Readout.

22/ Whilst still in the PMS Press VFO B

23/ Press the Magic Number of 9,2,4,9 in that order.

You should Now Have 00.000.0 MHz in VFO A,

And 999.999.9 MHz in VFO B.

24/ Press the F Key Followed by the PMS Key.

25/ Press the PMS Key again.

THE END

FT736R.10

Original from G0HEG to MODS@WW

MODIFICATION OF THE PMS ON THE FT736R FOR THE 50 MHZ BAND

MOD 3 BY G0HEG AND G0TVL

I have not done this Modification,

At the Time of writing I can not do this Modification,

Because I do not have the 50 MHz Board in my FT736R,

But I know of a Friend of mine who after a chat with me

on 2 Mtrs,

did this Modification on his RIG,

It is one of the easiest of the Modifications

for the FT736R.

Modification of the PMS on the FT736R for the 50 MHz Band

Extended coverage on receive from the front panel can be

achieved by means of a few simple but repetitive actions,

The receive can be extended from about 46 MHz to around 56 MHz,

By the use of the Repeater Shift,

This give a coverage of about 10 MHz,

But it may be Greater or Smaller than this,

There is no need to snip any of the components,

and you will not need a soldering Iron for this Modification.

Instruction

Make sure that you Put the Highest Frequency in to VFO B,

and the Lowest one in to VFO A.

1/ Turn on your RIG.

2/ Put the RIG into Repeater Shift for the 50 MHz Band,

By Pressing the + RPT KEY.

3/ Set the OFFSET to 01.999.9.

4/ Tune the RIG to the Lowest Band edge,

of 50.000.0 MHz.

5/ Press the REV KEY ( KEY 5 ).

6/ Press the UP MHz Button.

You should now see 49.000.0 MHz on your Digital Readout.

7/ Repeat Steps 5 & 6 Once More,

Alternating between both until you see 48.000.0 MHz

on your Digital Readout,

8/ Increase the OFFSET to 03.999.9.

9/ Repeat Steps 5 & 6 Twice,

This takes the Frequency to 46.000.0 MHz.

10/ Increase the OFFSET to 05.999.9.

11/ Repeat Steps 5 & 6 Twice,

This takes the Frequency to 44.000.0 MHz.

12/ Keep on Increasing the OFFSET by 2,

until you get the OFFSET to 51.999.9.

13/ at the same time as you Increase the OFFSET by 2,

Repeat Steps 5 & 6 Twice after every Increase in

the OFFSET,

until you get 00.000.0 MHz on your Digital Readout.

Be careful not to go beyond 00.000.0 MHz,

Because the RIG will Automatically Default back to

50 MHz and you will have to start again,

It is so frustrating when you lose so much of what you

have already done.

PAGE 1

CONT IN FT736R.11

FT736R.11

STAGE 2

Now you should have been using VFO A as the starting point,

you should have 53.999.9 MHz in VFO B,

and 00.000.0 MHz in VFO A.

Press the Function KEY which is Marked with an ( F ),

Followed by the PMS KEY ( KEY 5 ),

You have Just stored your New Band Edges in to the PMS.

Press the PMS KEY again,

this time slowly Tune across the Two Band Edges,

Until you see 999.999.9 MHz appear on your Digital Readout,

Now whilst still in the PMS,

Press the VFO B Button.

These Next Few Steps Are Very Important

1/ Press The following KEYS ( KEY 9,KEY 2,KEY 4,KEY 9 in that order).

The Magic Number is 9,2,4,9.

2/ Now Press the F KEY, followed by the PMS KEY.

3/ Press the PMS KEY again.

You have Just stored the New Band Edges in to the PMS,

you Should now have in VFO A,

Which should be 00.000.0 MHz,

and in VFO B,

you should also have 999.999.9 MHz

Press either of the UP of DOWN scan Buttons.

You will now find that your FT736R will now scan

up and down the Band from

00.000.0 MHz to 999.999.9 MHz,

or from 999.999.9 MHz to 00.000.0 MHz.

There are 3 other Mods for the FT736R,

that you can do if your RIG as the Boards in it,

Also there may be another Mod for the American 220 MHz

Band but at the time of writing I do not know if

it can be done.

List of Mods for the FT736R

as found by G0HEG and G7OHY.

Mod 1/ is for the 144 to 148 MHz band,

- RPT Plus Down MHz Button,

Frequency 139 to 155 MHz.

Mod 2/ is for the 430 to 450 MHz Band,

+ RPT Plus Up MHz Button,

Frequency 425 to 459 MHz.

Mod 3/ is for the 50 MHz Band,

+ RPT Plus Up MHZ Button.

Frequency 45 to 56 MHz ?.

Mod 4/ is for the 1296 MHz Band,

+ RPT Plus Up MHz Button,

Frequency 1215 to 1326 MHz ?.

Mod 5/ is for the American 220 MHz Band,

+ RPT Plus UP or DOWN MHz Button,

Freuqency 216.6 to 230 MHz ?.

All these Mods are for Receiving only and can not be used

to transmit on.

PAGE 2



FT736R Extend freq Pt 1

FT736R.1 Extend freq Pt 2

FT736R.2 Killing the beep

FT736R.3 CAT info Pt 1

FT736R.4 CAT info Pt 2

FT736R.5 9600 BAUD

FT736R.6 VHF ATTENUATOR MOD

7. PMS

8. PMS

9. FROM 8

10. PMS

11. FROM 10



Are there any mods for the Yaesu FT736R?

I modified mine. There's a catch tho - the mod involves adding a pair of

switches to the module-address lines into each of the rf modules..it's

kinda funky but it does work. Look at your schematic, then wire up the

switches such that your 6m and 2m modules *think* that they're 440MHz

modules! The trick then is to look at the display, which reads 443.000,

and mentally adding 6.0 such that you know the real frequency is 49.000MHz.

Similarly, the display will read 445.000 when the 2m module is really at

145.000. When you finish adding the switches, you'll have to powerup the

'736 with the switches in the 'extended range' position. Then use one of

your existing memory frequencies, transferred to either the A or B vfo, to

then bandswitch up or down to the 440 band. Bingo! If you goof, the

display will read "error". Start over by powering down, and then repeat

the procedure. Sometimes the frontpanel logic will simply lock, just start

over and it will eventually work. Mine never takes more than 2 tries. With

the switches in the 'normal range' position the '736 will function as a

stocker.

CONTINUED IN FILE FT736R.1

YAESU FT-736R MODS & INFO

***********************************

I modified mine. There's a catch tho - the mod involves adding a pair of

switches to the module-address lines into each of the rf modules..it's

kinda funky but it does work. Look at your schematic, then wire up the

switches such that your 6m and 2m modules *think* that they're 440MHz

modules! The trick then is to look at the display, which reads 443.000,

and mentally adding 6.0 such that you know the real frequency is 49.000MHz.

Similarly, the display will read 445.000 when the 2m module is really at

145.000. When you finish adding the switches, you'll have to powerup the

'736 with the switches in the 'extended range' position. Then use one of

your existing memory frequencies, transferred to either the A or B vfo, to

then bandswitch up or down to the 440 band. Bingo! If you goof, the

display will read "error". Start over by powering down, and then repeat

the procedure. Sometimes the frontpanel logic will simply lock, just start

over and it will eventually work. Mine never takes more than 2 tries. With

the switches in the 'normal range' position the '736 will function as a

stocker.

The range for the 6m unit is therefore 46-56 MHz, and the 2m unit will

give you 140-150 MHz. Yes, the transmitter will also work this span, but

keep in mind a 10 watt signal on the 49 MHz band sticks out like a sore

thumb! ;-) ("Wow! Listen to *that*! He must have a better walkie-talkie

than these RadioShack junkers!") ;-)

My attempts to modify the range on the 430 MHz rf module have not meet

with much success, and a careful look at the schematics/numbers tell the

story quite well; The module covers 430-440, a 10MHz range. Therefore,

the address-line trick will yield no more coverage.

**************************************

I bought a Yaesu FT736 about 6 months ago. It's a great radio but one

thing annoyed me about it. When I used in on FO-20 or the microsats with my

TAPR PSK modem, the PSK modem adjusts to the doppler frequency shift by sending

pulses to the up/down buttons on the microphone. Only problem is, everytime it

sent a pulse the radio went BEEP. This beep didn't come thru the speaker,

instead it was emitted from a separate buzzer. As a result, even when using

the headphomes, the beep would disturb the whole house. This was a particular

problem on late night passes. Thanks to a suggestion from WB2IBO and the folks

at Yaesu, I've discovered you can fix the problem.

If you remove the top cover you will find a circuit board right behind the

front panel. As you are facing the front of the radio on the top left corner

you will see capacitor C63 identified on the board with a red wire going into

the circuit board next to it. Clip the red wire and no more beep. You won't

actually see the beeper. To find the beeper you have to remove the top and

bottom covers (see the manual) and then loosen the screws on either side of

the front panel (see section 3.5.4 in the manual). At the bottom left of the

circuit board is the black buzzer, about the size of a quarter. The red wire

you need to clip starts from here. You don't actually have to remove the

bottom cover if you clip it where it goes back into the circuit board on the

top, however.

You could rig up a switch to turn the buzzer off and on, but I don't why

anyone would ever want to turn it back on.

********************************************************************

Here are some routines to drive a Yaesu FT736R CAT interface.

Note that the radio has TTL levels, so you need to build a circuit to

convert RS232 voltages to TTL voltages. You can do this with a MAX231 etc,

or a couple of NPN transistors. The latter can be mounted inside your

DB25 connector.

1. The Yaesu spec contains one or two typos which are herein connected.

2. It does not appear to be necessary to space out the 5 control

bytes by 50 ms.

3. The READ S-meter, squelch functions smetimes fail to return all 5

bytes, so the code (FNget) accomodates this.

REM

REM FT736R CAT Interface Drivers

REM ----------------------------

REM Last modified 1990 May 21

REM

REM (C)1990 J R Miller G3RUH

REM

REM Procedures and functions available are:

REM

REM PROCcat(on|off)

REM PROCmode(lsb|usb|cw|cwn|fm|fmn)

REM PROCptt(on|off)

REM PROCsplit(off|plus|minus)

REM PROCoffset(MHz)

REM PROCfreq(MHz) (* e.g. MHz = 145.6789

etc *)

REM PROCfull_dup(on|off)

REM PROCsat_mode(tx|rx , lsb|usb|cw|cwn|fm|fmn)

REM PROCsat_freq(tx|rx , MHz)

REM FNsqlch (* returns 0 if no

signal *)

REM FNmeter (* returns S-meter value

*)

REM

REM

REM Example - prepare FT736R for FUJI-OSCAR-20

satellite

REM

====================================================

PROCset_up: REM Do once only per session!

PROCcat(on)

PROCfull_dup(on)

PROCsat_mode(rx,usb): PROCsat_freq(rx,435.916)

PROCsat_mode(tx,fm ): PROCsat_freq(tx,145.850)

PROCcat(off)

END

:

REM Now follows procedures and functions

:

DEF PROCcat(F%)

IF F%=on B%(5)=0 ELSE B%(5)=&80

PROCput: ENDPROC

:

DEF PROCmode(B%(1))

B%(5)=7: PROCput: ENDPROC

:

DEF PROCptt(F%)

IF F%=on B%(5)=8 ELSE B%(5)=&88

PROCput: ENDPROC

:

DEF PROCsplit(F%)

B%(5)=&89: REM simplex

IF F%=plus B%(5)=&49

IF F%=minus B%(5)=9

PROCput: ENDPROC

:

DEF PROCoffset(F)

B%(5)=&F9

PROCfr(F)

PROCput: ENDPROC

:

DEF PROCfull_dup(F%)

IF F%=on B%(5)=&E ELSE B%(5)=&8E

PROCput: ENDPROC

:

CONT IN FT736R.4

FT736R.4

DEF PROCsat_mode(F%,B%(1))

IF F%=tx B%(5)=&27 ELSE B%(5)=&17

PROCput: ENDPROC

:

DEF PROCfreq(F)

B%(5)=1

PROCfr(F)

PROCput: ENDPROC

:

DEF PROCsat_freq(F%,F)

IF F%=tx B%(5)=&2E ELSE B%(5)=&1E

PROCfr(F)

PROCput: ENDPROC

:

DEF PROCfr(F)

IF F>=1000 FX%=on ELSE FX%=off

F=(F+0.000005)/1000

FOR I%=1 TO 4: F=F*100: F%=INT(F): F=F-F%

B%(I%)=(F% DIV 10)*16 + F% MOD 10

NEXT

IF FX%=on B%(1)=B%(1)AND &F + &C0: REM 1200 MHz band

corrrection

ENDPROC

:

DEF FNsqlch

B%(5)=&E7: PROCput: PROCget

IF B%(1)=0 THEN =0 ELSE= -1

:

DEF FNmeter

B%(5)=&F7: PROCput: PROCget

=B%(1)

:

DEF PROCset_up

REM Establish constants etc

DIM B%(5)

off=0: on=-1

rx =0: tx=-1

plus=+1: minus=-1

lsb=0: usb=1: cw=2: cwn=&82: fm=8: fmn=&88

:

REM Most code after this is for controlling the BBC micro

hardware

REM and needs recoding for any other machine. Note "*FXn,m"

is

REM merely a BBC micro operating system call, no. n, parameter

m.

REM

REM Set up RS423 = 4800,8,N,2

*FX8,6

*FX7,6

*FX156,16,227

ENDPROC

:

DEF PROCput

REM Procedure sends five bytes to RS432c port, spaced by 50ms

REM bytes are in array B%(1) ... B%(5)

FOR I%=1 TO 5

REM Delay below is in the spec, but can actually be omitted

T%=TIME: REPEAT UNTIL TIME >= T%+5: REM Wait 50 ms/byte

REM Now direct output to RS423, o/p char, and restore o/p to

screen

*FX3,3

VDU B%(I%)

*FX3,0

NEXT

ENDPROC

:

DEF PROCget

REM Flush RS423 I/P buffer, then read bytes from input stream

REM until op code is detected. Previous value is result.

REM (straight reading 5 bytes found to be unreliable)

*FX15,1

*FX2,1

REPEAT B%(1)=B%: B%=GET: UNTIL B%=B%(5)

*FX2,0

ENDPROC

:

REM End of code

REM de G3RUH @ GB7SPV 1990 May 29

JAS>



FT736R.1

The range for the 6m unit is therefore 46-56 MHz, and the 2m unit will

give you 140-150 MHz. Yes, the transmitter will also work this span, but

keep in mind a 10 watt signal on the 49 MHz band sticks out like a sore

thumb! ;-) ("Wow! Listen to *that*! He must have a better walkie-talkie

than these RadioShack junkers!") ;-)

My attempts to modify the range on the 430 MHz rf module have not meet

with much success, and a careful look at the schematics/numbers tell the

story quite well; The module covers 430-440, a 10MHz range. Therefore,

the address-line trick will yield no more coverage.

Have Fun, 73! --

-Avatar-> KB6LUY +-------------------------+

%

Note: I haven't tried or verified this, proceed at your own risk!

WA2ISE

And don't transmit outside your licesned bands!

: MODS@EU

Date: 5 May 89 16:48 PST

From: [email protected]

To: [email protected]

Subject: ft727r CAT interface

FT-727R CAT System Interfacing and Control

This information describes the hardware and software requirements of

the CAT (Computer Aided Tranceiver) System in the FT-727R.

Connections

Four connections are used by the CAT SystemL three at the CAT jack,

illustrated below, and one (Signal Ground) ar the outer contact of the

MIC or EAR jack.

DO NOT SHORT THE OUTER CONTACT OF THE CAT JACK TO GROUND!!!

[Diagram of the CAT plug:

Looks like a stereo audio jack of the appropriate size.

The outer sleeve is +6 to +12 V DC (Battery Voltage) I do not think

this line needs to be connected.

The middle contact is the Serial KeyCode Input.

The center contact is the Serial Meter Output (00h to 0Fh).

See the manual for further description.]

Data Format:

All serial data consists of single byte binary codes sent at 4800

baud, TTL levels, with two INVERTED stop bits and one INVERTED start

bit.

Key Codes:

CAT Control consists of duplication the keystrokes that can be made on

the tranceiver keypad by sending the corresponding keycodes to the

Serial Keycode Input contact of the CAT jack. The most significant

four bits (MSD) correspond with the key column and the least

significant four bits (LSD) correspond with the key row. The Function

key (on the side of the tranceiver) is simulated by setting bit 7.

Results are identical to those described for manual operation in the

FT-727R Operating Manual. Serial Meter Output is sent approximately

every 100 ms while receiving.

[Table for the codes. The lines in [] are the original values in the

Yaesu handout, and are followed by the corrected lines as determined

by KB7ABA. Remove the lines in [] to see what sould be the right table.]

[ { FUNC F E D C B ]

{ FUNC 8 9 A B C

MSD {

[ { NORM 7 6 5 4 3 ]

{ NORM 0 1 2 3 4

LSD

V

E +RPT SIMP -RPT PMS P SET

1 2 3 V c

D SAV T T DEC T SET TX M S/CH

4 5 6 M MR

B SAVE T ENC SCAN MC Shift

7 8 9 C <=>

7 LOCK BATT BEEP DUP Step

* 0 # V/U D

*** downloaded from Internet by Peter, [email protected] ***

***************************

From : DG4EAH

To : YAESU@WW

Type/status : B$

Date/time : 14-Apr 13:49

BID (MID) : 134707DB0GV

Message # : 202755

Title : re:codes for ft727R

Hey YL's and OM's,

the codes are as follows:

CODE VHF-Range UHF-Range

001111 100-200 400-500 no shift on VHF and UHF

002222 144-146 430-440 no shift on VHF, 5 Mhz on UHF

005555 144-146 430-440 with normal shifts on VHF and UHF

007777 144-148 440-450 0,6 Mhz/ 5 MHz shift

009999 144-146 430-440 0,6/ 1,6 MHz shift

003333 144-146TX 144-154RX 430-440 0 / 5 MHz shift

Every other code is going to produce an ERROR on the display!

73 + 55 de Markus, DG4EAH in Frankfurt

When there is more than one combination which has the same frequency

range, the difference is the default step size and/or the default

repeater offset. Of course, choices that do not match the VCO and

filters do not actually transmit or receive on those frequencies.

A particularly strange example is that the VHF side of the set can

be set to tune from 404 to 444 Mhz, but again, it won't actually lock.

Even in the 101-141 mode, the VHF VCO will not lock - this must be for

use with some other sort of VCO (It looks like this would cover the

aeronautical band rather nicely.) There are two really wierd VHF

settings, those for 8AL-242 and 1R3-158L. These must be for use

with some other LCD controller - it displays truly unusual and

non sequential things when stepped through the "bands".

R74 seems to have something to do with something like selecting

the IF frequency, or something else like that. When set, it

really screws up the VHF reception.

My technique for determining these straps is to remove the straps

that come in the unit, solder wires to each pad, run the wires out

of the unit to a bank of DIP switches, screw the unit back together,

and then go through all of the DIP switch combinations. I usually

use a stereo microscope and 30 guage wire for this. Since I didn't

try powering the unit on with every combination of keys held down

for each DIP switch combination, there may still be other secrets

possible.

Since I was looking for something like receive and transmit from

zero to infinity, and I didn't find it, I kept looking until I got

bored and wanted to button the thing up and start using it. I

determined, from studying the schematic, that there should be a

hiddem strapping diode from CPU pin 2 to CPU pin 22. I installed

one, but nothing changed. In fact, changing it and powering the

unit up did not cause a reset. Therefore, I concluded that this

really wasn't a mystery strap, afterall. However, there could be

others. I'm trying to get a data sheet for the CPU, from Hitachi,

to see if any of the grounded pins are actually I/O pins -- they

might be good candidates, particularly if their traces are routed

in such a way as to be easily accessible for cutting.

CONT IN FT470.9



To : MOD@EU

Type/status : B$

Date/time : 04-Nov 15:23

BID (MID) : 12119-PB0AFK

Message # : 241882

Title : Yaesu FL 7000

(This message has been read 2 times so far in this BBS.)

Path: !DK0MNL!DB0MW!DB0ERF!DB0HSK!PI8DRS!PI8DAZ!PI8APD!PI8GCB!PI8MBQ!PI8VNW!

From: PB0AFK@PI8VNW.#ZH2.NLD.EU

To : MOD@EU

[¯¯¯ TST HOST 1.43b, UTC diff:5, Local time: Mon Nov 03 19:46:16 1997 ®®®]

±ğ MODIF / YAESU FL7000 ğ±

ENTER = continue, A = Abort, N = Next, C = cancel paging -->

Subject: FL7000.mod

From: Howard Ryder <[email protected]>

FL7000.mod

Most Yaesu FL-7000 Solid State Linears have a hypersensitive protection

circuit that causes the "protect" to trip when no improper conditions exist.

This modification will desensitize the protection circuitry; but still allow

it to function when an improper condition exists.

The modification is as follows:

PROTECTOR UNIT

* REMOVE D7006 P/N HZ15-1L

* REMOVE R7029 P/N J02245102

* REMOVE R7033 P/N J02245104

* REMOVE Q7004 P/N G3107331Q

ENTER = continue, A = Abort, N = Next, C = cancel paging -->

* ADD R7060 Resistor 10K 1/4w P/N J01225103 This resistor must be added

from pin 7 of Q01 (1/2 of AN6552) to pin 5 of Q7003 (1/2 of AN6552)after

removing R33 10ohms.I carefully snipped the lead in the center and put my

10K in series with the existing 10 ohm resistor.

POWER SUPPLY UNIT

* REPLACE C8019 P/N K13179009 WITH 1uf 50VDC P/N 59V010M5X11TR5.

This capacitor goes between the base and emitter of Q8008 P/N 2SC2229. NOTE:

the positive lead goes to the base of the transistor.I put mine in parallel

with th existing 0.047.

ALIGNMENT OF NEW CICUITRY

CM COUPLER

1. Remove the ALC cable.

2. Remove P06 (J04) on the Auto Tuner Relay Unit

3. Key the driving radio in CW (FT-757, FT-767, etc)

4. Adjust the power output to 400 watts

ENTER = continue, A = Abort, N = Next, C = cancel paging -->

5. Connect the Black lead of DC Voltmeter to pin 1 and the Red lead

to pin 3 on the Protector Unit, OR connect the Black lead to ground

and the Red lead to TP01 on the CPU Unit (use the 0.25V range on the

DC voltmeter)

6. Adjust TC5001 for a MINIMUM reading on the DC voltmeter

7. After adjustment, reconnect P06 and the ALC cable

PROTECTOR UNIT

ALC METER AND ALC PROTECTOR ADJUSTMENT

1. Set the ALC pot fully clockwise (CW)

2. Apply +9VDC to TP7001

3. Adjust VR7008 to the right edge of the ALC zone

4. Set the ALC pot fully counter clockwise (CCW)

5. No adjustment on the SWR Protector VR7004 is required.

IC PROTECT ADJUSTMENT

1. Connect the DC voltmeter to the center of VR7004

2. Adjust VR7004 to 3.8VDC +/-0.1V

ENTER = continue, A = Abort, N = Next, C = cancel paging -->

The correct resistor and capacitor are available from Yaesu if you desire.

TB-9601- Yaesu (562)404-2700

=============================================================================

ÍÍÍÍÍÍÍÍÍÍÍÍÍÍ TstHost 1.43bÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ

 '73 de Henk, PB0AFK @ PI8VNW.#ZH2.NLD.EU 

 PC:486Dlc/40Mhz/5MB+100MB HDD, CD-player 

 TNC:AEA PK88 eprom TF 2.6a + BayCom+DCD 

ÍPortFolio UserClub-MFC 426-HP 100LX UserÍ

/ack

--- End of messsage #241882 to MOD from PB0AFK ---

YAESU FL2100B 12 METER MODIFICATION

by Bill Walton KJ6EO

If you do not mind losing 10 meters on your FL2100B, this quick mod should

have you up and running on 12 meters with near full power output.

Place the FL2100B on its side with the LOADING control nearest the surface

that the amp is setting on. Make sure that the amp has been UNPLUGED and that

the PLATE VOLTAGE has dissipated before you proceed. Remove the screws that

hold the bottom cover on and remove the bottom cover of the amp.

Set the BANDSWITCH to : 10

Set the PLATE CONTROL to : 9

Set the LOADING CONTROL to: Fully counter-clockwise

Disconnect the 850 volt red wire that leads from the transformer to the DIODE

BOARD (located right behind the TRANS - OPERATE switch. Install a SWR bridge

between the EXCITER and the FL2100B. Tune your HF rig to 24.950. Turn the

FL2100B on and place the amp in the OPERATE MODE. Excite the the AMP with an

AM signal, enough so that you can calibrate (set) your SWR meter. Place your

SWR meter in the REV position and read the SWR. While in the TX mode, tune

L206 (located near the GROUNDING WINGNUT just inside of the amp chasis) untill

you achive your lowest SWR reading. You have just completed the retuning

proceedure of the 10 meter ANTENNA INPUT COIL.

If you would like to operate both 10 meters and 12 meters, you may want to

tune L206 on a frequency between your operating fre-quencys on 10 and 12.

Re-solder the 850 volt red wire (with the AMP off and un-pluged). Re-assemble

the AMP and enjoy INCREASED POWER OUTPUT on 12 METERS.

Send questions, comments, or other to: KJ6EO @ KJ6EO

RELAYED BY N0KGX...GENE