The minimum power for reliably tuning a KAT500 depends on the characteristics of the exciter. If the exciter fold backs when the load is mismatched, and a low power setting is used, the KAT500 may think it has found a good match when the reflected power drop below the detection threshold.
I have scope traces that how severe the power foldback is during KAT500 tune for my Kenwood TS-590S. I run full search tunes with power set to 25 W but I check the tuning solution with only 5 W. A properly installed KAT500 will inhibit amplifier keying before any change in the tuning solution so it should never be possible for KAT500 to open any relay with 500 W input to the tuner. 73, Andy, k3wyc ______________________________________________________________ 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]
