[Elecraft] OT: Astron RS-35M Transformer Hum

[Barry]

Fairly common.  I have a different Astron linear supply and have had that
issue.  Make sure the cabinet and transformer screws are tight.  Assuming
there's a relatively small gap between the top of the transformer and the
top of the case, stick something between the two surfaces (folded piece of
paper, for example) to dampen the induced vibration.

Barry W2UP


Does anyone have a way to dampen the physical hum generated by the
transformer in an RS-35M PS? 

This really is just transformer hum I’m hearing, not signal hum…my station
is fully bonded and as a result quiet in that regard.  Most folks probably
never hear this hum, but I have been “blessed” with really good hearing and
so this hum irritates the dickens out of me. 

If push comes to shove, I will relocated the PS farther away from the
operating position, I just didn’t want to have to extend power and bonding
runs and thus am hoping someone has a different idea.

Thanks & 73,
David N5DCH
(Formerly AH6TD)






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