First off it was a great Field Day and my new K3 impressed me extremely not only in performance but in it's functionality.
To kick off Field Day I installed a new KPA100 into the K3. I did all the necessary TX gain calibrations using a dummy load. One thing I noticed immediately was that I was hearing a very high pitched squeal coming from either the PA board or possibly the KIO3 (the board the amp plugs into). The squeal seems to vary in frequency each time the transmitter keys up (can only hear it when the radio is in TX). The squeal is not very loud but its loud enough for me to hear it if I listen closely. It doesn't seem to be power related. The squeal is there even if the radio is in TX but no power going out (RF Pwr set to 0W). The closest thing I can compare the sound to is perhaps a tiny leak in an air hose. Is this typical of a bad solder joint or something? This squeal only pertains to the new KPA100 installation. Before the amp was installed I didn't hear a thing. I should also note that nothing appears to be affecting performance. Puts out 100 watts no problem. Clean modulation, etc. -------------- Geoffrey Wolf AB3LS (Amateur Radio Callsign) University of Pittsburgh '14 gr...@pitt.edu liltechd...@me.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
