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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: Serious Micro-Phonics and Hum from Citation V posted by DannyR on July 7, 2012 at 20:23:43:
Danny,
The insulation on the wires and the wires themselves can both fail. The windings are subjected to repeated heating/cooling cycles, they move ever so slightly as a result of expansion/contraction from heat, and from magnetostriction; and if there are any solder joints inside them they can work harden. See the pic of a Cit II trafo I posted as an example of an internal wire failure. This pic is of a power trafo but the failure can occur in an OPT too.
Keep in mind too that magnet wire now is FAR better, especially the insulation.
BTW, getting Cit V trafos rewound is significantly less than getting Cit II trafos done since the V's aren't potted. I wouldn't rule out keeping the amp - but Triode Kingdom's offer is nice to see - this particular amp's life is FAR from finished!
Oh - the potting material used in a Cit II is called "permafil" it's a mixture of tar and ground slate.
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- RE: Serious Micro-Phonics and Hum from Citation V - Jim McShane 12:19:02 07/08/12 (0)
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