[ICOM] icom 706 MK2

[Facility 406]

Back in the day, there were some well known issues...

Fuses that looked good, but the buss bar inside came loose at the cap, 
where it can't be seen, causing a weak, or erratic connection, resulting 
in cutouts above a certain power.

The C shaped clips holding the fuses, could become loose, and causing an 
erratic connection, above a certain power.

The "Molex" (it looked like Molex, but I dealt with them at the time, it 
wasn't theirs, note the 90 degree turn of two keys) connector, 
notoriously bad, due to bad materials, causing loose connections, 
arcing, burning, oxidation, low voltage, current, et cetera, all 
appearing above a certain power, and then getting worse, once the 
problems started.

I literally fought all of this for two years, up to a couple times per 
week (don't transmit, move the radio, wiggle the wiring, look at it too 
hard, breath, et cetera) before changing everything associated with 
getting power into the radio.

Voltage and continuity tests were never good to determine any of these 
problems.  One would need to monitor power supply voltage and current at 
the connection, then voltage and current at the radio, at the same time, 
and if an issue appears, monitor voltage and current at each point 
something changes, power supply, fuse inputs, outputs, and connector. 
Lots of voltage and current meters...  This is why the problem has been 
so elusive over the years.

Kurt