[Elecraft] KPA100 Help PLEASE

[Ned Asam]

Peter,

It sounds like you almost working, since all the low power circuits seem to 
be working. I assume the LP filter  relays on the KPA 100 are also working. 
That is, you can transmit and receive at low power on all bands. All these 
circuits are powered from the low power source on the base K2.

What happens when you disconnect the low power 12 volts, and the high power 
12 v is still connected? If all is off, then this would also point to the 
High Power 12 volt path.

If I understand the situation correctly, I would trace the high power 12 
volts from the back of the unit through the amplifier section -- r13, c75, 
rfc1 and so on...

Are you getting the 90 to 150 volts at R11 and R12? This is generated on 
the KPA from the high power 12 volt source. If not, check all around T3 for 
good solder connections.etc...

Regards,

Ned, KC2FLM