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In Reply to: RE: Dynaco A470 Output Transformers posted by strijw426 on August 17, 2014 at 14:36:43:
I have about 6 St-70's and IIRC the readings could vary widely.
So I checked another pair I have out of chassis. Plate to B+ was 145 /175 on one transformer and 179/199 on other transformer: both were working when removed for rebuild.
I would run your transformer and then order another only if they are actually bad.
I am powder coating my transformer covers and chassis. Picture enclosed. If you get the Stainless chassis , remember that Dyna uses the chassis as a ground plane, articularly for the cathode resistor for the power tubes. Stainless is a lousy conductor, so run a wire to tie the chassis ground points together. Everything will sound better: faster and quicker. more open.
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Follow Ups
- RE: Dynaco A470 Output Transformers - unclestu 16:46:45 08/17/14 (1)
- RE: Dynaco A470 Output Transformers - strijw426 18:27:07 08/17/14 (0)
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