RE: You should have at least -90 available to filter and adjust down to -60 or so (nt)

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In Reply to: You should have at least -90 available to filter and adjust down to -60 or so (nt) posted by Chip647 on April 10, 2024 at 07:44:52:

Thanks Chip647. I have -113V available and adjustable bias of -35V to -75V. I measured the bias on the HF-89 that I rebuilt 20 years ago and that range worked for 6550s and KT-88s.

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Follow Ups Full Thread

Topic - Negative bias info needed - JKT 15:12:22 04/09/24 (3)

You should have at least -90 available to filter and adjust down to -60 or so (nt) - Chip647 07:44:52 04/10/24 (1)

RE: You should have at least -90 available to filter and adjust down to -60 or so (nt) - JKT 15:05:13 04/12/24 (0)

That Info Readily Available in the Published Curves - Triode_Kingdom 16:23:45 04/09/24 (0)

Follow Ups

RE: You should have at least -90 available to filter and adjust down to -60 or so (nt) - JKT 15:05:13 04/12/24 (0)

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