[Top] [All Lists]

[AMPS] SB220 Xformer labodomy

To: <>
Subject: [AMPS] SB220 Xformer labodomy
From: (Steve Thompson)
Date: Sat, 20 Feb 1999 18:02:52 +0000
In message <19990220134450.AAA11963@[]>, Rich Measures
<> writes
>>In message <19990218225337.AAA20049@[]>, Rich Measures
>><> writes
>>>>I have a very noisy SB220 power transformer that sounds like a bad
>>>>florescent ballast. Other than being noisy, the amp works fine.
>>>?  Such transformers are normally potted in tar.   However, you could
>>>have one with a potting void.  .  On my Web site, a simple method of
>>>potting transformers with polyester laminating resin is described.  The
>>>transformer needs to be removed in order to do the potting.  The screws
>>>that hold the laminations together need to be tightened before potting.
>>>-  later, Len
>>Yacht varnish appears to work well. We submerged the tfr for 24hrs and
>>let it dry for a week or so.
>?  I like to use such varnish for the outside of the laminations.
>However,  shrinkage during drying  is so large that is it not appropriate
>for use inside a transformer.  .  Polyester laminating resin does not
>have this disadvantage.
>-  later, Steve
Good point - our need was only external protection.


FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>