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Repairs and Modifications
(Yaesu and Tait)
please scroll down for the Tait
please scroll down even further for the Icom Speaker Mic
and even further for the Motorola GM 350 Frequency list.
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Yaesu FT 227 R
Replacing the audio chip
phew
despite replacing the chip, the radio is still very very quiet on receive
any ideas ????????
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FT 26 memory battery
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TAIT 500 series
variable power on the front panel and the 4 CHANNEL
Modification
2K2 variable
Remove the on board preset
and add the Variable to the front panel
Just use a small screwdriver to adjust RF Power
Mic Connections for a TNC
Adding extra frequencies to the TAIT 525 4m radio
Now before you all start screaming "why not do the 99 channel MOD"
let me just say this...................
1. I am lazy and ......................
2. four frequencies is enough for me,
it gives me the calling channel,
the MB7FM parrot repeater,
and two simplex channels.
Above are two extra DPDT toggle switches for the extra frequencies
The LEFT toggle is for channel 1, and the RIGHT toggle is for channel 2
Above shows the rear of the toggle switches wired to the diode matrix board
each diode matrix has a separate set of diodes for TX and RX on the two channels
DIODE A1 is the diode that adds 12.5KHz to the frequency.
All that is required is to switch in or out A1 on both the RX and TX side to go up or down 12.5KHz
In my example, I have the main channels programmed as follows
CH 1 70.425 MHz
CH 2 70.450 MHz
by switching out DIODE A1 CH 1 becomes 70.4375 MHz
therefore by switching out DIODE A1 CH 2 becomes 70.4625 MHz
as you can see from the above screenshot, just by removing A1 gives the 12.5 KHz
jump.
and again, by removing A1 gives the 12.5 KHz jump.
so removing the A1 link adds 12.5 KHz
I hope this will help someone.
This MOD will, of course, work on all the TAIT 500 series 2 channel radios,
should two frequencies not be enough, but four frequencies are adequate for your
needs.
There is of course a wealth of information out there if you wish to construct
the 99 channel MOD, if you do, good luck.
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ICOM SPEAKER MIC
convert for use on a Yaesu
Its a simple modification, just add a 2.2k resistor
this will allow you to use the Icom Speaker Mics on
Yaesu Radios wih the same TWO PRONG connectors
(3.5mm and 2.5mm)
Above ICOM EM-46 (NO MOD)
Above ICOM HM-46 (2.2k Resistor Added)
Its virtually the same place on either speaker mic
Both of them now work on my Yaesu's as well as my Icom's
The only difference is that when used on a Yaesu, the red LED on the front will
not light.
Everything else, TX/RX Modulation and Audio are the same
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Motorola GM 350 Low Band
Channel Tx Freq Tx PL/DPL Pwr Rx Freq Rx PL/DPL ---------- ---------- ---------- --- ---------- ---------- 1 (001) 070.010000 Disabled 25 070.010000 Disabled 2 (002) 070.020000 Disabled 25 070.020000 Disabled 3 (003) 070.030000 Disabled 25 070.030000 Disabled 4 (004) 070.040000 Disabled 25 070.040000 Disabled 5 (005) 070.050000 Disabled 25 070.050000 Disabled 6 (006) 070.060000 Disabled 25 070.060000 Disabled 7 (007) 070.070000 Disabled 25 070.070000 Disabled 8 (008) 070.080000 Disabled 25 070.080000 Disabled 9 (009) 070.090000 Disabled 25 070.090000 Disabled 10 (010) 070.100000 Disabled 25 070.100000 Disabled 11 (011) 070.112500 Disabled 25 070.112500 Disabled 12 (012) 070.125000 Disabled 25 070.125000 Disabled 13 (013) 070.137500 Disabled 25 070.137500 Disabled 14 (014) 070.150000 Disabled 25 070.150000 Disabled 15 (015) 070.162500 Disabled 25 070.162500 Disabled 16 (016) 070.175000 Disabled 25 070.175000 Disabled 17 (017) 070.187500 Disabled 25 070.187500 Disabled 18 (018) 070.200000 Disabled 25 070.200000 Disabled 19 (019) 070.212500 Disabled 25 070.212500 Disabled 20 (020) 070.225000 Disabled 25 070.225000 Disabled 21 (021) 070.237500 Disabled 25 070.237500 Disabled 22 (022) 070.250000 Disabled 25 070.250000 Disabled 23 (023) 070.262500 Disabled 25 070.262500 Disabled 24 (024) 070.275000 Disabled 25 070.275000 Disabled 25 (025) 070.287500 Disabled 25 070.287500 Disabled 26 (026) 070.300000 Disabled 25 070.300000 Disabled 27 (027) 070.312500 Disabled 25 070.312500 Disabled 28 (028) 070.325000 Disabled 25 070.325000 Disabled 29 (029) 070.337500 Disabled 25 070.337500 Disabled 30 (030) 070.350000 Disabled 25 070.350000 Disabled 31 (031) 070.362500 Disabled 25 070.362500 Disabled 32 (032) 070.375000 Disabled 25 070.375000 Disabled 33 (033) 070.387500 Disabled 25 070.387500 Disabled 34 (034) 070.400000 Disabled 25 070.400000 Disabled 35 (035) 070.412500 Disabled 25 070.412500 Disabled 36 (036) 070.425000 Disabled 25 070.425000 Disabled 37 (037) 070.437500 PL77.0 25 070.437500 Disabled 38 (038) 070.450000 Disabled 25 070.450000 Disabled 39 (039) 070.462500 Disabled 25 070.462500 Disabled 40 (040) 070.475000 Disabled 25 070.475000 Disabled 41 (041) 070.487500 Disabled 25 070.487500 Disabled 42 (042) 070.500000 Disabled 25 070.500000 Disabled 43 (043) 070.260000 Disabled 25 070.260000 Disabled |
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