|[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.
More information about the AMRadio mailing list
This page last updated 23 Feb 2018.