In Reply to: RE: Is there a secret to using the 7A4? posted by Tre' on January 7, 2017 at 11:20:06:
Or any other color for that matter. What should the plate voltage be? I was originally aiming for around 250vdc but i got nowhere near that. Like you said, the Av for the 7a4 was low only 60vdc. It was working though and sounded ok.
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- If i use a Blue LED ? - DAK 15:05:15 01/07/17 (0)