[Elecraft] Using the KPA500 with the K3 & Yaesu MKV Field

[David Inger]

I have been using the KPA500 with my K3 with the AUX cable.  Everything has
worked fine since Day One.  Yesterday, I hooked up a newly acquired MP MKV
Field to the KPA with a cable from the PA Key jack on the KPA500 to the "TX
GND" jack on the MKV.   I switch between the rigs using a coax switch into
the amp.  Using either RF sensing or manual bandswitching,  I have no
problems generating 500 watts with about 45 watts drive from the MKV.

 

The problem is when the MKV is in receive mode.  As long as the amp is in
the Standby position, everything is fine.  As soon as the amp is switched to
the Operate position, there is major attenuation of the receive signal; I
mean like from S9 to S1.  I solved the problem by temporarily unplugging the
AUX cable from the KPA500; receive is now normal in either the Standby or
Operate mode.  This works but it is inconvenient.  I cannot seem to find a
menu setting or some other means to allow by rigs to be connected to the amp
while leaving the K3-to-KPA500 AUX cable connected.

 

Any suggestions?

 

73 de K6SBA

David in Santa Barbara, CA