In Reply to: pre-amp posted by nc on June 23, 2012 at 21:09:44:
all my preamps/sources have step-down transformers at the output ... tipically 10K:600
anyway there was someone somewhere who built a 300B spud amp and had no problems, I misplaced the URL but that site was full of good info also on filaments.
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Follow Ups
- step down - gluca 23:24:18 06/23/12 (0)