The hum seems to be the 50 Hertz power supplies? -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA-500-HUM-from-PA-and-not-from-Speaker-tp6647675p6652787.html Sent from the Elecraft mailing list archive at Nabble.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
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