Loose PS transformer? ______________________ Clay Autery, KY5G
On 9/2/2017 9:40 AM, Dauer, Edward wrote: > KPA500 started a new routine today after several years of perfect operation. > It emits an audible hum at a frequency of 60 Hz with a rise and fall time of > 3 to 4 seconds. It’s just loud enough to be annoying. It continues whether > the front panel power switch is on or off. It ceases only when the rear > panel power switch is off. Neither the temperature of the amp nor the duty > cycle have any no bearing on it, as the noise persists even when the amp > comes on from dead cold. Anyone heard this in a KPA500, or have any ideas > about it? Is something expensive about to happen? > > Ted, KN1CBR ______________________________________________________________ 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]
