Black Paint on HV Windings ?

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WA1GFZ:
Signal Transformer co. uses black paint or whatever the coating is and i have never seen one fail

kg8lb:
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WD5JKO:

The "Signal Transformer Corporation" has made black transformers for decades. The black does penetrate into the magnet wire. More recently the EPA and OSHA folks are regulating transformer varnishing processes. The signal folks describes the 3 main varnishing / potting categories used today.

Here is the link:


http://www.signaltransformer.com/TechnicalLibraryPage.asp?pDoc=20

Jim
WD5JKO

W2PFY:
Quote

The new one came with an old name, newly made in Mass. Not real comfortable however with what looks like  black paint all over. Fish paper and varnish on windings is fine. Black paint with it's carbon based pigment could be a poor choice on HV transformer windings?


Is this a newly manufactured transformer or something purchased from NOS? Who is the manufacture? Is it a multi tap? I would like to see a picture if possible.

Ed-VA3ES:
Quote from: N3DRB The Derb on October 31, 2009, 10:11:07 AM

[...]  trouble is the plugs for the plug n jacks are always missing.
Easy to find: go to your neighborhood Shadio Rack, and buy  a package of cheap RCA plugs.   Take 'em apart and keep the pins and attached phenolic ring, and junk the outer part. Presto!  Thordarsen Plugs!

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