[Elecraft] KPA500 TX

[Chuck Chandler]

Just a follow-up to my question about using the KPA500/KAT500 with a
second, older radio.  I just finished some more testing and found that when
I remove the AUX cable from the back of the KPA and try to put the KPA into
TX with the keyline, it stays in RX.

A continuity tester confirms the rig keyline is closing when the rig is in
TX, and the KPA shows driver power output, as does the KAT.  But, the KPA
won't switch to TX and amplify.

Is there some other function keeping the KPA in RX even though the AUX
cable is disconnected?

73 de Chuck, WS1L

chandlerusm at gmail.com