[Elecraft] KPA500 Problem

[Kevin der Kinderen]

I've done some testing. I have a good selection of Times LMR-400-ULTRAFLEX
jumpers that I stocked up on from MPD Digital. Never had a problem with any
of their cables and so far it's looking like they are all good.

I set things up as Radio <--> KPA500 <--> DL1500 with new cables in between
and the KAT500 removed from the chain.

Running the radio to 10 watts the radio showed 1.25:1 SWR while the amp was
in standby. When in operate, the SWR on the radio maxed out.

I fired up KPA500 Remote and bumped the radio up to 20 watts. In standby,
radio showing 1.25:1 SWR KPA500 remote reported

Power: 18 w (that's typical)
SWR: 1.1:1
Current: PTT OFF (typical in standby)
Voltage: 74.8
Temp: 22 C

Switched the amp to operated, radio still at 20. KPA500 remote reported

Power: 0 W
SWR: NO RF
Current: PTT OFF
Voltage: 74.8
Temp: 22 C

It's like standby/operate is switching between straight-through and open.
It seems to be falling into place with Brian's description of his recent
problem. I heard no cracks, booms, or sizzles. Smelled no smoke or ozone.
It just started giving me problems intermittently and seems to have finally
settled down into a broke state.

Working with Elecraft to troubleshoot and will share any findings that
might be helpful or garner sympathy. ;)

73,
Kev K4VD