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Vintage threads from the first ten years
Shorted PT secondary: next debug step?
 1/20/2006 5:19 PM |
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Mark Lavelle | Shorted PT secondary: next debug step? I have a ~1967 Deluxe Reverb here that was blowing fuses, and whose owner thought a bigger fuse would be a good idea (doh!). The 5VAC secondary is now apparently shorted. I'm not at all sure that I'm going to offer to fix this thing (it's a friend-of-a-friend type favor so far), but I'd *like* to diagnose the original problem. The only thing visibly wrong is that the 12AT7 reverb driver has lost its vacuum, but I don't detect any shorts at the pins. Any thoughts on what else I can fruitfully do without replacing the PT first? I do have an unused PT with similar enough ratings (plenty of current, but only 250-0-250) to use for debugging, but I don't particularly want to go to that much trouble... |
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| Replies: |
| Ray Ivers Mark, Enzo Be sure about the PT first. COmple... -- 1/20/2006 6:56 PM R.G. Do yourself a favor - get a light b... -- 1/21/2006 12:26 AM Mark Lavelle Shorted GZ34 -- 1/21/2006 5:41 PM Enzo Re: Shorted PT secondary: next debug step? -- 1/23/2006 5:08 PM Mark Lavelle BFDR replacement PT? -- 1/24/2006 11:05 PM |