Hello,
I have a KPA500, (working fine), however, at one, and only one, fan
speed there is a resonant vibration coming out of the amp. It is one
speed above just starting...
It is also clearly a resonance vibration, not a PS hum. It is also only
present when the fan goes up one speed from whatever is the first speed.
Has anyone else experienced this, and if so, what was the fix?
--
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
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