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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Octal base driver for 300b posted by andy evans on August 25, 2020 at 01:58:28:
>>I'd prefer a low bias voltage to avoid a cathode bypass cap if possible<<
Leaving the cathode un-bypassed will raise the tube's plate impedance significantly. While this might be okay for a voltage gain stage, it's not a very good idea for a tube acting as a driver and even more so if it's driving a DHT. I would reconsider that idea if I were you.
A good 300B driver tube that's been used by quite a few is the 6N7 where the two sections are run in parallel.
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Follow Ups
- RE: Octal base driver for 300b - sideliner 18:11:37 08/25/20 (5)
- RE: Octal base driver for 300b - andy evans 00:32:54 08/26/20 (4)
- RE: Octal base driver for 300b - PakProtector 19:22:26 08/28/20 (0)
- RE: Octal base driver for 300b - sideliner 11:32:44 08/26/20 (2)
- Very useful info. - andy evans 15:28:29 08/26/20 (1)
- RE: Very useful info. - sideliner 17:42:51 08/26/20 (0)
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