05-17-2021, 10:29 PM
Terry
A couple of interesting things about yours. One, I order info on the 201x from Chuck Schwark, one of the sheets he sent showed revisions to this unit and a later revision said that they removed the phenolic board in the middle with all the caps on it, and used Bakelite blocks instead. Is yours that latter version ?
Also, if you look at mine, on the Right side wall of the chassis, is a low pass choke part#70 (see pic) it's part of the 10KC filter trap, after the 75 first audio tube, to keep nearby stations from bleeding in, when using the High Fidelity, as I understand it. It also appears to provide resistance for the B+ of the 75 tube plate. Is this coil in your unit ?? Also curious to me is why they used a chunk of wood for this
Unfortunately the 4 legged critter didn't stop at the cloth on the wire, but proceeded to feast on the bottom of this coil. What really, really stinks is that he broke through the windings in 6 or 8 places essentially trashing it.
I've been debating for sometime what to do about it. I've read many threads on rewinding transformers but haven't seen anyone attempt one of these. My gauge is saying it's 40 gauge wire, very thin. There must be 20 layers or more, with a very thin paperlike layer between each one. This is just one of the dilemmas with this unit I'm hoping to get some advise for. More to come.
A couple of interesting things about yours. One, I order info on the 201x from Chuck Schwark, one of the sheets he sent showed revisions to this unit and a later revision said that they removed the phenolic board in the middle with all the caps on it, and used Bakelite blocks instead. Is yours that latter version ?
Also, if you look at mine, on the Right side wall of the chassis, is a low pass choke part#70 (see pic) it's part of the 10KC filter trap, after the 75 first audio tube, to keep nearby stations from bleeding in, when using the High Fidelity, as I understand it. It also appears to provide resistance for the B+ of the 75 tube plate. Is this coil in your unit ?? Also curious to me is why they used a chunk of wood for this
Unfortunately the 4 legged critter didn't stop at the cloth on the wire, but proceeded to feast on the bottom of this coil. What really, really stinks is that he broke through the windings in 6 or 8 places essentially trashing it.
I've been debating for sometime what to do about it. I've read many threads on rewinding transformers but haven't seen anyone attempt one of these. My gauge is saying it's 40 gauge wire, very thin. There must be 20 layers or more, with a very thin paperlike layer between each one. This is just one of the dilemmas with this unit I'm hoping to get some advise for. More to come.
