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Re: AC on 300B

hi,
Even with a 2a3 I doubt it would work to use AC heating. In theory, the hum from the two ac-heated dhts should cancel somewhat when they are coupled in series as common-cathode stages. guess the driver overwhelms that effect since its amplified further.

i'm going to try to stay with AC on the 300B. I still maintain that its not possible to get a really quiet amp with AC heating dhts (in SE) without some tricks. Maybe at 2.5v its tolerable.


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  • Re: AC on 300B - zarniwoop 07:12:38 05/08/07 (0)

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