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) Adding an extra RX-only port

This is usefull when using a big PA and or for RF bandpass filters. My FT102 + transverter recently broke down So i now use the IC706. The sensitivity of the IC706 is not what I was used with the transverter. There is raise of noise when connecting the antenna so in fact it is just sufficiënt.

Using the IC706 with an external PA you might need a lownoise preamp. But it is not so easy to use because without extra protection relays it can, and sure will be destroyed by the driving power of the IC706.

The best solution is having an extra RX–only input like most bigger tranceivers have. This way the preamp can be placed direct behind the first antenna relay and the output of it Goes to the RX-only port. The best place for this antenne relay of course is as close as possible to the antenne to avoid extra cable loss however not so practical.

Adding a separate RX port is an easy and clean modification. There is a spare opening in the backpannel where an extra BNC connector can be placed. Extra rings are used to fit because the hole is to big for the BNC. Then this BNC must be connected to J1 (rx) point found at the back of the filterunit.
The filterunit is situated top-backside. After removing 5 screws the board can be moved up at the backside Just enough to mount the BNC underneath it. It is not needed to remove it completely that would be a problem because of all connections to it.


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