[ICOM] IC-756PRO - Thumping, flickering screen, reset

[Gary Fiber]

I had a similar problem using a GE-MVP for 9600 packet use. The radio is a 
35 watt rig and the output was way down. Turned out to be the finger tight 
binding posts were not tight enough. Using pliers to tighten them solved 
the problem. So even a 1 volt drop across a high resistance connection can 
cause troubles.

In the Icom internal supplies the current shunt used to crack where it was 
soldered to the PC board and the crack would open under high current 
conditions. Lowering the power to about 50% would solve the problem.

Gary K8IZ

 > The problem appears to be dependant on either r.f.
>> > power, or power supply
>> > loading as when the r.f. power output control is
>> > backed off to about 40
>> > watts the thumping cuts down.
>> > Has anyone seen a similar problem before?  He has a
>> > 35 ampere Astron power
>> > supply that's 10 years old.
>> > David Ring N1EA

Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident