Got a motor rewind shop nearby? We used one for European tube OP transformers - mostly Grundig, Nordmende and TFK stuff. After the lamination removal and core recovery by the motor rewind guys, we rewound the transformers core on an old Meyer (Mayer? - been too long...) coil winder. A fly-fishing supply place yielded the fiber tape for wrapping each successive coil. We used purple, just like some of the originals.
I dunno what they used to remove the laminations - but the transformer went back to them for the dip and vacuum varnish. $18 a transformer total, or 3 for $30, and this was in the early-mid 80s. Your experience today will probably be different.
I have one Telefunken OP transformer with newspaper stuck to one side after the vacuum varnish. The article refers to the "upcoming 1984 US Presidential election".... Yeah, that far back..
I dunno what they used to remove the laminations - but the transformer went back to them for the dip and vacuum varnish. $18 a transformer total, or 3 for $30, and this was in the early-mid 80s. Your experience today will probably be different.
I have one Telefunken OP transformer with newspaper stuck to one side after the vacuum varnish. The article refers to the "upcoming 1984 US Presidential election".... Yeah, that far back..
Well, I just dropped a transformer into a bath of paint thinner ans methyl ethyl ketone. Will report back in a week or so and give a report....
Still looking for a good source of chloroform...from what Banfield has shown, that stuff is the heat when it comes to freeing up laminations.
Still looking for a good source of chloroform...from what Banfield has shown, that stuff is the heat when it comes to freeing up laminations.
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