Thanks to all those who have offered suggestion so far both by list and
direct.
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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