I have a stack of QST magazines from 1996 resting on top of my Astron
VS-35M. No transformer hum at all!

Have not tried magazines from any other years, so YMMV...

73,
Dale - WA8SRA

On Fri, Apr 24, 2020 at 4:09 PM Nate Bargmann <n...@n0nb.us> wrote:

> * On 2020 24 Apr 11:50 -0500, inventor61 . wrote:
> > If someone has a better idea than mine for making these, I am all ears.
>
> No better idea.  I've read in times past of someone sandwiching some
> compressible material between the transformer and the supply top cover
> to quell or reduce the hum.  I have an RM-50M that hums in this manner
> and fortunately it is not loud enough to keep me from listening to the
> K3 at about 8 o'clock with external speakers.
>
> 73, Nate, N0NB
>
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