TS430S
 
R:890220/1252z 321@VK2EHQ [via AMTOR KULNURA]
From: VK4ALV@VK2EHQ
MODS FOR THE KENWOOD TS430S FOR AMTOR. 
ABOUT THE TS430S,,THE MODS ARE AS FOLLOWS:- 
ON THE I.F.BOARD CHANGE C-164 FROM 0.22MFD TO 10NFD..50V CHANGE C-60 
FROM 10MFD TO 4.7MFD. 16V.... 
PARALLEL A 150KOHM RESISTOR ACROSS R.109 USUING A SMALL SWITCH OR 
BY WHATEVER MEANS YOU CAN DESIGN TO SWITCH THIS RESISTOR IN AND OUT. 
IN FOR ARQ AND OUT FOR ALL OTHER MODES. SOME PEOPLE USE THE SEND/REC 
SWITCH, OTHERS HAVE USED THE NOISE BLANKER SWITCH. I HAVE USED A 
SMALL MINI SWITCH WHICH I HAVE MOUNTED IN PLACE OF THE LEFT FRONT 
RUBBER FOOT. 
IT WILL PROBALY HELP TO CUT DIODE D-50 ON THE I.F.BOARD. IF YOU USE 
A 500HZ FILTER IN THE CWN OR SSBN POSITION THEN PARALLEL A 10MFD 
CAPACITOR ACROSS C-10 OR C-8. ADD A 10MFD CAPACITOR ACROSS C-161.(ACTUALLY 
I FOUND THAT THESE LAST TWO WERE NOT NECESSARY IN MY 430S.) 
YOU WILL FIND IT BEST TO TAKE THE AUDIO FROM IN FRONT OF THE VOLUME 
CONTROL, BUT THOSE PEOPLE USUING AUDIO FROM THE SPEAKER SOCKET SEEM 
TO GET OK RESULTS. REALLY YOU CAN GET AWAY WITH JUST THE FIRST TWO 
MODS, CHANGE C-60 AND C-164. THIS ORIGINALLY CAME FROM VK2AGE. 73S 
DE LARRY IN RAVENSHOE. 


C:\MODS-2>TS430S.1

more mods available in hardcopy only.

FOR MORE INFO, CONTACT CRAIG, N7ETV @ WB6MQM.NV


C:\MODS-2>TS430S.2

FROM: N0HME
SUBJECT: TS430 NOISE BLANKER MOD

--QRX!--

--LOADING (12)--

 KENWOOD TS-430 NOISE BLANKER MOD     

 ON THE RF UNIT X44-1510-XX CHANGE THE

 FOLLOWING COMPONENTS:
  1-CHANGE R80 TO 100K 1/4 WATT RESISTOR.

  2-CHANGE R81 TO 56K 1/4 WATT RESISTOR.

  3-CHANGE C125 TO A 560 PF 25 VOLT DISC CAPACITOR.


 NO REALIGNMENT IS REQUIRED        

 KENWOOD TS-430 AGC MOD 

   THE TYPE OF SPEECH PROCESSOR

 CIRCUIT USED IN THE TS-430 IS AN AGC

   (AUTOMATIC GAIN CONTROL) DRIVEN AUDIO FREQUENCY AMPLIFIER. 

   BY DECREASING THE TIME CONSTANT SUBSTANTIALLY, THE SPEECH PROCESSING

   EFFECT WILL BE IMPROVED.

   THE MODIFICATION IS VERY SIMPLE.

   REPLACE CAPACITOR C104 4.5 UF ON THE IF BOARD BY A SMALLER  
   VALUE OF O.47 UF. 



 TO MODIFY THIS CAPACITOR

  1-REMOVE THE IF BOARD AS INDICATED FOR THE CW FILTER INSTALLATION.

  2-REMOVE C104 FROM THE BOARD. 

  3-MOUNT A 0.47 UF CAPACITOR ON THE BOARD. 

  4-MOUNT THE IF BOARD AS INDICATED BY CW FILTER INSTALLATION. 

  5-YOU ARE NOW FULLY OPERATIONAL AGAIN. 

  6-ADJUST THE MIC GAIN WITHOUT THE PROCESSOR UNTIL NORMAL ALC    
 
  DEVIATION. 

  7-SWITCH THE PROCESSOR ON AND ADJUST VR7 NEAR C104 UNTIL NORMAL 
 
  ALC DEVIATION. (DO NOT ALTER THE MIC GAIN AT THIS TIME) 

  8-ENJOY THE SPEECH PROCESSOR IMPROVEMENT. 

 FROM KF4NJ JOHN............RELAYED   BY...N0KGX..GENE



C:\MODS-2>TS430S.3

        TRANSMIT ENABLE FOR MARS AND CAP FREQUENCIES FOR THE TS430S
        For MARS and CAP transmit capability, a minor change is required:

   1. Unplug the DC power cable.
   2. Remove the top and bottom covers of the set.
   3. Locate the RF unit connector 10. Diode D39 is near the connector
      (labeled D39 on the circuit board). Take a small pair of diagonal
      cutters and clip the lead at the top of the bend.
   4. Locate IC-2 on the Control Unit, under the IF unit. Resistor R148
      is near IC-2, clip the resistor lead.
   5. This completes the modification. Reassemble the unit, being careful
      not to pinch any leads.

 ***->Be careful not to transmit out-of-band, or accidentally operate on
      any non-amateur, unless you are authorized to do so.

                 DO NOT JEOPARDIZE YOUR LICENSE!
                                   RELAYED   BY...N0KGX...GENE



C:\MODS-2>TS430S.4

FROM: N0HME
SUBJECT: TS430 AGC MOD

--QRX!--

--LOADING (3)--

THE AGC MOD ON THE TS430 KENWOOD TO RUN
AMTOR REQUIRES THREE COMPONENT CHANGES.
ON THE IF BOARD--FIND AND REPLACE
CAPACITOR C-60, A 10 MFD, WITH A 4.7
MFD.  CLIP ONE OF THE CONNECTIONSNON
DIODE D-50.  REPLACE CAPACITOR C-164, A
0.22 MFD, WITH A 0.1 MFD CERAMIC.  BOTH
D-50 AND C-60 ARE ON THE UPPER LEFT
CORNER OF THE IF BOARD AND ARE ALSO
MARKED ON THE PC BOARD.  HOWEVER...C-164
IS NOT MARKED CLEARLY.  IT IS A 0.22 MFD
CAN ELECTROYLTIC NEAR THE CENTER OF THE
IF BOARD.  IT IS JUST BELOW AND TO THE
RIGHT OF C-149 AND IS DIRECTLY RIGHT OF
IC-5.  LOOKING AT THE BACK OF THE BOARD,
ONE LEAD OF C-164 IS CONNECTED TO THE
JUNCTION OF A 47K OHM RESISTOR (R-129)
AND A GLASS DIODE (D-77).  THESE TWO
COMPONENTS ARE ALSO NOT MARKED ON THE
PC, BUT ARE SOLDERED TO THE BACK OF THE
BOARD.

ONE OTHER NICE TOUCH WAS TO PUT IN-LINE
WITH DIODE D-50,  A SHORT PIECE OF COAX
TO A MINIATURE TOGGLE SWITCH.  THIS
DISABLES THE MOD, SO THAT THE SMOOTH
CHANGE OVER FROM TRANSMIT TO RECEIVE
THAT THE 430 NORMALY HAS, CAN BE
RESTORED WHEN ULTRAFAST RECOVERY IS NOT
SO IMPORTANT.  IN CW, WITH D-50 CLIPPED,
THE RECEIVER KICKS BACK TO LIFE WITH A
SHARP CRACK AND GETS ANNOYING WHEN THE
GAIN IS REALLY HIGH, CHASING AFTER A
WEAK DX STATION --FOR INSTANCE.  SO THE
EWITCH REMOVES DIODEHD-50 FOR AMTOR AND
RETURNS IT TO THE CIRCUIT FOR ANYTHING
ELSE.

BEWARE!  EVERYTHING IS VERY TINY,
VERY CROWDED, AND VERY EXPENSIVE.

73S DE KA0SUN       RELAYED   BY...N0KGX...GENE



C:\MODS-2>TS430S.5

Subject: MODS FOR THE KENWOOD TS430S FOR AMTOR.
THE MODS ARE AS FOLLOWS:-
ON THE I.F.BOARD CHANGE C-164 FROM 0.22MFD TO 10NFD..50V CHANGE C-60
FROM 10MFD TO 4.7MFD. 16V....
PARALLEL A 150KOHM RESISTOR ACROSS R.109 USUING A SMALL SWITCH OR
BY WHATEVER MEANS YOU CAN DESIGN TO SWITCH THIS RESISTOR IN AND OUT.
IN FOR ARQ AND OUT FOR ALL OTHER MODES. SOME PEOPLE USE THE SEND/REC
SWITCH, OTHERS HAVE USED THE NOISE BLANKER SWITCH. I HAVE USED A
SMALL MINI SWITCH WHICH I HAVE MOUNTED IN PLACE OF THE LEFT FRONT
RUBBER FOOT.
IT WILL PROBALY HELP TO CUT DIODE D-50 ON THE I.F.BOARD. IF YOU USE
A 500HZ FILTER IN THE CWN OR SSBN POSITION THEN PARALLEL A 10MFD
CAPACITOR ACROSS C-10 OR C-8. ADD A 10MFD CAPACITOR ACROSS C-161.(ACTUALLY
I FOUND THAT THESE LAST TWO WERE NOT NECESSARY IN MY 430S.)
YOU WILL FIND IT BEST TO TAKE THE AUDIO FROM IN FRONT OF THE VOLUME
CONTROL, BUT THOSE PEOPLE USUING AUDIO FROM THE SPEAKER SOCKET SEEM
TO GET OK RESULTS. REALLY YOU CAN GET AWAY WITH JUST THE FIRST TWO
MODS, CHANGE C-60 AND C-164. THIS ORIGINALLY CAME FROM VK2AGE. 73S
DE LARRY IN RAVENSHOE.

Subject: TS430 sensitivity mod/contacts
 Title: TS-430S Modification
Kenwood has an official modification service bulletin for low or inter-
mittent receive caused by poor contact on one or more filter relays.
I received the bulletin plus free parts today and it is bulletin #902.
This is a very common problem and is noticed when going from 3.999 to
4.000 mhz for example if a difference in sensitivity is noticed.  If
interested contact Kenwood Service for info.....73's Steve

C:\MODS-2>TS430.6

A MOD FOR ALLOWING THE KENWOOD 430 TO TUNE DOWN TO ABT 10 KHZ IS TO CLIP 
R52 ON THE PLL BOARD. THIS LETS THE RECIEVER WORK DOWN TO 10KHZ OR SO. 
THE KENWOOD 430 WILL TUNE DOWN ON THE DISPLAY BUT GOES DEAD AT 149.99.
73S
STEVE FRITTS WA4GZE@KT4F 


C:\MODS-2>TS430S.7

For those of you wanting to know how to reset the microprocessor in
the TS-430S, here's what it looks like in the service manual:

1) FUNCTION SW:A
POWER SW:OFF
Set the POWER SW ON
while depressing the A=B
key. Then release the
A=B key.

Hope this helps someone...


C:\MODS-2>