[Elecraft] . Re: Astron hum/vibration (riese-k3djc at juno.com)

[Jerry Pittenger]

I had the same experience with an Astron 50A model.  I just started doing it
overnight.  I opened it up and narrowed it down to hum in the power
transformer.  I actually removed it and try to tighten the 4 bolts holding
the lamination of the transformer together.  I could get it to change pitch
but I was unable to eliminate it.  I ended up moving it to the work bench
and getting a new one for the station.  De k8ra  jerry in ohio