KB2LJJ Radio Mods Database
If you turn the knob a bit more to the left or to the right, then "Error" is displayed and nothing happens.
I wrote to Icom Europe and they say, that this function (P.AMP/ATT + RIT/SUB) is only used in the factory during the production
process of the IC-706MKIIG. to calibrate the centersetting of the shift know.
Afterwards a new calibration shouldn't be necessary.
When you press the arrow in the SHIFT-ADJ menu for one second, the position of the shift know is stored as the new center
setting.
User comment
706 mod
MODIFICATIONS:
WARNING: Improperly performed modifications can severely damage your
radio. have performed these modifications successfully, but I
offer no guarantee or warranty for them. Proceed at your own risk.
TOOLS NEEDED:
1) Small philips-head screwdriver 2) Tweezers 3) Magnifying glass 4)
Low-wattage (15 watt) soldering iron 5) Long-nosed pliers
MODIFICATION 1: Enables out-of-band transmit for 1.6 MHz to 54 MHz.
This does not enable extended VHF transmit This does not enable AM or FM broadcast band transmit. Your memories will be
cleared after this modification, since you need to reset the CPU.
1) Open the top of the radio by removing the 3 top screws and 2 side
screws. Look at the radio from the with the front panel facing you.
screws.
2) Gently pull up the speaker and set is aside without damaging the
speaker or the wires that attach it to the rig.
3) Note the silver rectangular box near the middle of the PCB marked
something like "9 MHz SSB Filter".
4) Move your eyes up from this filter toward the back of the radio.
Just before you get to the "D 108" marking, you will see two tiny
diodes, two blank spaces, and one additional diode. They look
something like this:
D108
[XX] [XX] [ ] [ ] [XX]
Remove this diode ^^^^
5) The second diode from the left needs to be removed. I did this
by crushing it with long-nosed pliers. You can also heat it with a
low-wattage soldering iron and pull it up with tweezers. Be sure
not to damage the other diodes or the PCB. Be sure that you don't
apply too much heat, since the heat can damage the PCB and the
other diodes.
6) Re-assemble the radio. Reset the CPU by pressing and holding
down the UP and DOWN buttons on the front panel and pressing
POWER.
Improved VHF recieve mod:
154-200 MHz RANGE
To open up the 154-200 range,cut the yellow wire on the plug labled "j-4" on the right side of the radio on the bottom,the book
points to this connector.
http://www.kb2ljj.com/data/icom/ic-706-MKII.htm (17 di 30)23/08/2009 23.05.07
