Some more of the factory cork pieces between the transformer and case fixed 
mine up – the 50 also.

Hank
K4HYJ

From: inventor61 .
Sent: Sunday, June 9, 2019 1:48 PM
To: li...@w2irt.net; elecraft@mailman.qth.net
Subject: [Elecraft] [OT] RS-35M noise

Peter

I now have the prototypes completed of a composite material cover to
replace Astron 35A size power supply covers.

This solves the acoustic noise problem.

The new cover looks terrific and is a 1:1 swap with the old one.

I went through *exactly* the same problem you describe, and then buying the
same replacement supply, then modifying it, ad nauseum, before fixing the
original issue.

I expect to be able to produce these (it's done on a CNC machine) in the
coming weeks.
I have several requests already.

I do not yet know the cost but it won't be outrageous.
Would this interest you?  It has certainly interested others!

73 Steve KZ1X
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