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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Can you DC couple two DHT stages? posted by andy evans on April 10, 2007 at 03:54:43:
Andy,Don't confuse max. allowable plate to cathode potential with the plate to ground potential.
I think you can DC couple both legs of your diff. amp to a 1J6. You'll have to dedicate an alkaline "D" cell to the 1J6 filament and construct a CT from a resistor pair in parallel with the filament. The CT gets connected to a RC network that puts the filament an appropriate number of V. more positive than the grid is, with respect to ground. It's the same old cathode bias setup, with the cathode positive with respect to ground for DC and at ground (courtesy of the cap.) for AC.
CCS loading the 1J6 anodes is (IMO) a good idea, as you can set the operating point spot on.
Eli D.
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Follow Ups
- Re: Can you DC couple two DHT stages? - Eli Duttman 06:36:39 04/10/07 (4)
- Re: Can you DC couple two DHT stages? - andy evans 06:56:48 04/10/07 (3)
- Re: Can you DC couple two DHT stages? - Eli Duttman 07:34:44 04/10/07 (2)
- Re: Can you DC couple two DHT stages? - andy evans 07:46:05 04/10/07 (1)
- Re: Can you DC couple two DHT stages? - Ray Moth 07:10:11 04/13/07 (0)
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