[Icom] Help on blocking Rx and Tx on my 706MKII

[icom@mailman.qth.net]

Get a copy of the service manual and compare the diode matrix on the main CPU 
between the US version and the Asian version. Simply reconfigure the diode 
matrix to match that of the Asian version, that is if the Asian version's 
frequency ranges meet the type-acceptance requirements of your country. Most 
of the Icom radios, as well as Yaesu and Kenwood, all use the same CPU for 
the various versions of a given model. The diode matrix simply tells the CPU 
which instruction set (ie:freq ranges) to use. 

If you do not have access to the service manual, Icom may send you the page 
IF you get ahold of the right person who is willing to do it.


I had to do a similar thing about 10 years ago with an Icom IC901. My 
beautiful state of NJ had a crazy scanner law on the books which basically 
made any newer dual band radio with extended receive coverage illegal in an 
automobile in NJ, unless you were a police, fire, or medic officer. Due to 
some bozo jamming the local police frequency (later caught), my vehicle was 
suspected (wonder why with all the antennas on it!!!!). A search warrant was 
issued to impound my car and I was arrested and had my radio gear 
confiscated. Went to court and had the case thrown out ( 18 months and $$$$ 
later) with the help of some well-known hams, and helped get the law changed 
in this state. Meanwhile, between court dates and before the jammer was 
caught, I was pulled over numerous times, and the police dept's so-called 
communications engineer was baffled as to why my replacement radio (same 
model)had less frequency capabilities. Had to see their faces when they 
thought they had me a second time and were disappointed to see a radio with 
only ham-band coverage! This same engineer couldn't comprehend the basic 
direction-finding techniques either! When I offered to assist, they were even 
more unfriendly since they did not want their problems (jamming) exposed. 
Gotta love politics!



Good Luck,
Eric
KK2ED
 


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