In Reply to: Who made this 12au7??? posted by earnie3 on July 10, 2012 at 20:13:04:
Look at the curved edge of the plates, the shoulders on the, plates where the support rods come through the micas, and and the holes where the plates are folded together.
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Follow Ups
- CBS construction looks very similar - gortnipper 22:33:34 07/11/12 (0)