Icom IC-706 (Icom IC 706 MKIIG IC706) transceiver mods reviews software and diagrams

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Icom IC-706 (Icom IC 706 IC706)

Icom IC 706

Programming interface schematics for Icom:
Programming software for Icom IC-706 (Icom IC 706 IC706) :
PDF Service Menu for Icom IC-706 (Icom IC 706 IC706) :
PDF Service Manual with schematics for Icom IC-706 (Icom IC 706I IC706) : Icom IC-706 (Icom IC 706 IC706) Operating manual
Schematics for Icom IC-706 (Icom IC 706 IC706) :

Mods for Icom IC-706 (Icom IC 706 IC706) :
    Icom IC-706 (Icom IC 706 IC706) Motorola Keypad Microphone
    Icom IC-706 (Icom IC 706 IC706) to codan 9350 auto antenna tuner interface
    Icom IC-706 (Icom IC 706 IC706) all version, modulation tweaks at ease
    Icom IC-706 (Icom IC 706 IC706) Mk1- Deaf on 144Mhz
    Icom IC-706 (Icom IC 706 IC706) Increased mic gain
    Icom IC-706 (Icom IC 706 IC706) Increased SSB modulation
    Icom IC-706 (Icom IC 706 IC706) e-z fix
    Icom IC-706 (Icom IC 706 IC706) NO RX Sensitivity
    Icom IC-706 (Icom IC 706 IC706) RF OUTPUT on 1 band only and low on others
    Icom IC-706 (Icom IC 706 IC706) Adding an extra RX-only port
    Icom IC-706 (Icom IC 706 IC706) Improved VHF receive mod (see also yellow wire mod)
    Icom IC-706 (Icom IC 706 IC706) To expand the band on the VHF portion
    Icom IC-706 (Icom IC 706 IC706) FM Transmit Fix
    Icom IC-706 (Icom IC 706 IC706) Microphone Audio Response Improvement
    Icom IC-706 (Icom IC 706 IC706) "Halbautomatik" fur manuelle Tuner
    Icom IC-706 (Icom IC 706 IC706) 10 watt tune modification/An Icom IC706 Tune Trigger
    Icom IC-706 (Icom IC 706 IC706) , MKII, MKIIG xmit mods - tip
    Icom IC-706 (Icom IC 706 IC706) Some tips.
    Icom IC-706 (Icom IC 706 IC706) MARS/CAP Modification
    Icom IC-706 (Icom IC 706 IC706) Review
    Icom IC-706 (Icom IC 706 IC706) Enables out-of-band transmit for 1.6 MHz to 54 MHz
    Icom IC-706 (Icom IC 706 IC706) More semsitive transmit for 2 meter
    Icom IC-706 (Icom IC 706 IC706) 60 MHz to 200 MHz bandpass filter
    Icom IC-706 (Icom IC 706 IC706) Extended RX mod
    Icom IC-706 (Icom IC 706 IC706) Info/mods
    Icom IC-706 (Icom IC 706 IC706) Expanded frequency
    Icom IC-706 (Icom IC 706 IC706) spare 0.3A

Icom IC-706 (Icom IC 706 IC706) technical specifications : Icom IC-706 (Icom IC 706 IC706) technical specifications

Icom IC-706 (Icom IC 706 IC706) Increased mic gain

This modification isn't easy but it takes care of the low audio problem and brings the 706 up to speed.

IC22 is the microphone preamp chip. R236, the feedback resistor, is 27K from the factory.

Remove it and replace with a 120K resistor. Add a 220 pF bypass capacitor in parallel with C210 and you are ready to go!

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