[Elecraft] Astron hum/vibration

[Steve Ellington]

>From my experience....Once it starts, there's no cure. I think the windings 
in the transformer eventually start rattling around inside....Maybe you 
could talk to Astron?

Steve
N4LQ
----- Original Message ----- 
From: "Barry" <w2up at comcast.net>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, May 17, 2011 11:28 AM
Subject: [Elecraft] Astron hum/vibration


>I have an Astron RS70M linear supply that I've used for many years to
> power everything 12VDC in the shack, including my K3.  In my former QTH,
> I had it located under the operating desk and never heard a peep from it.
>
> In my new shack, which is considerably smaller, I hear an annoying hum
> from it which seems to be coming from the top of the case.  It goes away
> if I press down on it.  Any ideas how to get rid of the noise?
> Tnx,
> Barry W2UP
>
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