[Elecraft] KX3 and KPA500

[Carlson David]

Thanks Adrian for you advice. I did change the ACC2 IO setting to LO=PTT. The KX3 still will not key the KPA500 when I press the mic button. The KX3 goes into transmit but not the KPA500.  I have the center wire from the KPA500 PA Key connected to the tip of the 2.5mm plug going into the KX3. If I reverse the lead on the cable (from the PA Key to the ACC2IO) the KPA500 does go into transmit without me keying the KX3. That is where I was before, I have to put the KPA500 into standby to receive and then put it into operate when I want to transmit. For your information I do use my KPA500 with my K3 and it works perfectly. I did discount the custom cable between the K3 and KPA500 when I connected my KX3 to the KPA500. 

Is there any setting on the KPA500 menu that I need to change? Any ideas? 

Thanks

Dave WA6DKN




> I can't figure out how to set the ACC2IO on the KX3 so that it will key
the KPA500 properly. I currently have the >ACC2IO in the off position. When
I connect the cable between the ACC2IO and the PA Key on the back of the
KPA500 it puts >the KPA500 in a transmit mode. I have to manually put the
KPA500 in standby to receive and then Operate to transmit. I >have tried a
number of different settings on the KX3 and KPA500 with no success.  What am
I doing wrong?  (incidentally >the KX3 will drive the KPA500 to almost 200
watts output). 

ACC2 IO     setting > LO=PTT (input; apply 0 V or ground to

activate PTT)