Should be fine. Use a cable with RCA plugs to connect the K3's KEY OUT connector to one of the KAT500's PTT RELAY connectors, and another RCA cable the other KAT500 PTT RELAY connector to the amplifier KEY IN. This allows the KAT500 to interrupt the PA key line during tuning.
When you move to a KPA500, add an additional 15-pin ACC cable from KAT500 to amp, and don't use the RCA cables, as the key lines are incorporated in the 15-pin cables. 73 de Dick, K6KR -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of George Kidder Sent: Saturday, December 17, 2016 08:09 To: [email protected] Subject: [Elecraft] KAT500 without KPA500 I am considering purchase of the KAT500 to use with my K3 and an old AL-80A, with a view to future expansion to the KPA500. Is there any reason why an Auxbus cable direct from the K3 to the KAT500 would not provide the necessary band and frequency information? George, W3HBM ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]

