Since it's a daisy-chain signal path and, apparently, the K3 is working OK, the first place that I'd look is at the AUX cable leading from the K3. It is fully connected?
If that looks good, I'd connect directly from the K3 to the KAT500 and check to see if it is communicating - does it change settings when you change bands? If so, connect directly to the KPA500 and see if the K3 communicates with it, making band changes from either unit. That should isolate which piece of equipment or which cable is a problem. 73 Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Fred Smith Sent: Sunday, December 23, 2012 4:01 PM To: [email protected] Subject: [Elecraft] K3/KPA500/KAT500 Help Last night when I went to bed all was working perfectly with my setup radio, tuner, amp this when I turned the amp, radio on tuner powers up when power supply is turned on nothing talks to each other. Turned everything off and tried again same thing amp, radio will not change bands together nor will the tuner tune the antenna. I powered all down again and shut down power supply and turned off power on rear on rear of amp. Powered all back up same thing no error messages of any kind. Any suggestions? 73, Fred/N0AZZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html

