[Elecraft] [KPA500] stuck on TX when AUXBUS attached

[Dale Boresz]

Uh - oh...

Then perhaps what I'm doing is not 'best-practice'. I just leave the K3 
connected and --powered on--, and I can drive the KPA500 from another 
radio and the KPA500 follows it and works perfectly. I even have the PTT 
connections from both radios paralleled (the other radio is a 
FLEX-5000A), so the only thing I need to do is change the source of the 
rf drive to the KPA500.

73, Dale
WA8SRA


On 9/14/2012 6:39 AM, Jack Brindle wrote:
> Yes. It must be disconnected. The K3 is loading the band and PTT inputs to the KPA, pulling them low. This has two effects - it will cause the KPA to change to 60 meters, and the KPA will transition into transmit. If you wish to use the KPA500 with another transmitter, you will need to first disconnect it from the K3.
>
> Jack Brindle, W6FB
> Elecraft Engineering
>
>
> On Sep 14, 2012, at 12:26 AM, eric norris <gliderboy1955 at yahoo.com> wrote:
>
>> Tonight I tried to use my KX3 with my KPA500, but when I turn off the K3 that it is attached to via AUXBUS, then put the KPA500 into OPERATE mode, the asterisk comes on and it is in TX, which means that the receiver of the KX3 goes deaf.  Is this the way it is supposed to work, or have I messed up a setting?  Will I have to remove the AUXBUS cable from the K3--even though the K3 is turned off--whenever I want to use the KPA500 with another rig?
>>
>> Thanks,
>>
>> Eric WD6DBM
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