[Icom] 706MKII-G recive

[Bill & Annie]

I installed a 706MKII-G (serial #10074) in my truck and noticed that with
the vehicle in motion receive signals are up and down. When stopped the
signal is constant and strong as it should be. This even happens on two
meter repeaters that have strong signals and the radio should hold full
scale. I removed this radio and installed another 706MKII-G (serial #7247)
which held the repeaters full scale while stopped or while moving. I put the
radio with the problem on the bench, hooked it up, then tried to repeat the
problem by tapping on the transceiver and bouncing it around. It works fine
on the bench and I couldn't get it to duplicate the problem. So I put the
problem radio into another truck and once again had an up and down receive
signal only when the vehicle is in motion. On repeaters that should be full
scale, the S meter fluctuates from about an S-3 to an S-20. When stopped it
goes to full scale. The audio out rises and falls with the meter. The
transmit signal does not appear to be affected. An external power meter
(Daiwa CN-801V) and signal reports verify this. Any suggestions or comments
would be appreciated. Bill KG4HPM