|[AMRadio] Drying out HV transformers / Chokes|
k4kyv at hotmail.com
Tue Sep 20 21:09:54 EDT 2005
>I have several 2.5v and 10v rusty,dirty, and rattling UTC small can S
>series filament transformers that I want rebuild and would like to know a
>source for transformer varnish and potting material, wax,tar, or whatever.
>On pulling the cover off the most rattling around one I found only sections
>of corrugated cardboard to be the "packing/potting" material !!.
Those were the "cheapies" made by UTC. Their higher quality transformers
were potted with tar. Some of the older S series actually had louvres in
the case for ventilation. These were essentially open frame transformers
with a protective case against physical abuse. Later S series did use
potting material. These were the lowest quality transformers UTC made, and
their ratings are for intermittent amateur service.
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