Hello. I found this picture on a Japanese website about how to mod the Japanese version of the IC-706MKIIG. I recently bought a Japanese version of this radio. It seems that the Japanese version is a bit different when it comes to the diode configuration.
I did first remove the D2030 diode on my radio, but that did not open up the TX range. Then I removed the D2028 diode, and this opened up TX from 1,6-26 MHz and 28-30 MHz.
TX is still only 50-54 + 144-146 + 430-440 MHz on VHF/UHF. RX is now 0,030-200 MHz + 400-470 MHz. For my purposes it works fine with this range.
Later I found this picture on a Japanese site suggesting that only D2028 is to be removed on the Japanese version. I don't understand the Japanese text, so maybe someone can translate it ?
 
The text in read is translated by N4VJVs wife, thanks for this fine translation.
Note fra N4VJV:
- This modification is for japanese versions.
- The japanese CB at 27 MHz, is still blocked on this radio.
- Japan has an 8 channel, ½ watt AM citzens band allocation between 26.968 and 27.144 MHz. Other frequencies in this range are used by fishing vessels, the reason for tight control.
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