[Elecraft] KPA500 Issue

[James Bennett]

Bob -

The * appears when I key the K3 and the amp is in operate mode. Likewise if I key the 705 and the amp is in operate mode, with the K3 powered on.

If I power off the K3 and place the amp in operate mode WITHOUT KEYING IT, the * appears, so you are correct - the amp thinks it is being keyed.

There is a jack on the 705 that allows one to key an external amp. I have that line running to the amp. Disconnecting it makes no difference the * appears as soon as I put the amp into operate mode. If I power on the K3, this does not happen. However, with the K3 powered on and that cable disconnected, the amp does not key at all, so it is working as expected - but only with the K3 powered on. Somewhere the K3 is getting its foot in the door when powered off…

Jim / K7TXA

p.s. do you have any idea what Jack was talking about when he said "switch the RADIO setting of the KPA from K3 to something else, either Serial or Analog”??