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Re: [Amps] E-core transformer

To: Larry <>,
Subject: Re: [Amps] E-core transformer
From: peter chadwick <>
Date: Mon, 02 Dec 2013 01:44:23 +0100
List-post: <">>
OK Larry, we may need to notch this up a bit,

Try witchcraft, for which you need to sacrifice a virgin if you can find 
one........the exact method of sacrifice is left to you as it isn't 

According to mediaeval bestiaries, unicorns could be captured by tying a virgin 
to a tree and lying in wait.....


Peter G3RZP

 Message Received: Dec 02 2013, 12:36 AM
 From: "Larry" <>
 Subject: Re: [Amps] E-core transformer
 Thanks to all those who have offered suggestion so far both by list and 
 To reply to all suggestions:
 The "potting" material seems to vary widely from sample to sample. Some 
 have what is definitely some kind of varnish, some have only a sort of 
 epoxy bonding the cores halves, and some have both.
 I have not tried boiling water but I did put a heat gun on one and 
 before the varnish softened, the core cracked apart. Don't know about 
 the epoxy samples.
 Denatured alcohol didn't do a thing.
 Real "paint remover" seems to have gone the way of DDT and everything 
 else that actually works. The stuff on the shelves might remove uncured 
 latex paint but doesn't even dull oil based paint or my fingers. If I 
 could find some of the "real" stuff, I'd give it a try.
 Acetone was tried briefly and it didn't soften the varnish. Didn't soak 
 it long so don't know if it would have eventually softened the varnish 
 or the epoxy.
 Have not tried lacquer thinner due to not having any handy.
 I have a sample soaking in MEK (substitute, can't seem to get the real 
 stuff in the paint stores any more) and it is softening the varnish 
 slowly but has not yet softened the epoxy.
 Interestingly enough, nothing so far has attacked the plastic bobbin.
 Might require heat plus a solvent, not gonna happen until the freezing 
 fog dissipates so I can do that outside!
 73, Larry - W7IUV
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