Re: {Collins} 75s1 PS Hum

In fact, many of the machine screws may just be loose.  Those fasteners work loose, or become corroded, over the years, for any number of reasons.  I "fix" a lot of "screwy" problems in "boat anchor" equipment just by tightening and / or loosening and then tightening, all of the machine screws and nuts that go through the chassis.  Remember, all of the grounds are made through these fasteners.

 Glen, K9STH 

      From: kc9cdt--- via Collins <collins@xxxxxxxxxxxxx>
 To: bridkarl@xxxxxxx; ne2i@xxxxxxxxx 
Cc: collins@xxxxxxxxxxxxx
 Sent: Thursday, October 12, 2017 10:10 AM
 Subject: Re: {Collins} 75s1 PS Hum
Go through and loosen(slightly) every ground...including tube socket mountings.
In some cases you may have to find a way to hold the nut as u tighten the screw.


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