Icom IC-706MKII Manual page 13

KB2LJJ Radio Mods Database
This information and photos was supplied by David Spicer,VK7ZDJ.
User comment
I removed the 2 diodes listed in the mod and it works beautifully. As well as clearing memories, the mod will clear information
related to the installed optional filters. You will need to go into the intial setup menu and reselect any optional filters you have
installed. See page 49 of user manual, Menu items 19 and 20. While you are in there, check the other settings. To enter the intial
setup menu, you hold down the lock button and power on the radio.
Mike Amp Mod for IC 706 MK II
It is based on information provided by ICOM Europe.
The level of the IC 706 MK II microfone amplification does not satisfy under certain circumstances like heavy pile up or operators
with faint voice.
A litle modification does help to increase the amplification level a lot: The 5,6 k ohm SMD type resistor R235 located on the main
unit has to be replaced by an approximately 1,0 k ohm type.
After modification the personal level of the microfone amplifier can be set in the initial setup (menue Q2).
1. To replace the resistor first open the top of the case by unsrewing the 3 screws in the middle and the 2 screws back on the
left and right side. Remove the top carefully and disconnect the loudspeaker cable.
2. Locate the main unit ( the one near the display front side) and disconnect all connectors.
3. Locate the 5 screws holding the main unit and unscrew them.
4. Pull out the main unit and turn it over. This is the side of interest.
http://www.kb2ljj.com/data/icom/ic-706-MKII.htm (13 di 30)23/08/2009 23.05.07
Expanded tx mod works on Canadian Model
From: ve7it