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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: 211 Push pull grid bias posted by lovetube on April 30, 2017 at 22:10:20:
The 211 is a 75 watt tube.
If you shoot for 80% of max dissipation at idle, that would be 60 watts.
At 1000 volts plate to cathode, that would be 60mA (60mA*1000v=60watts) per tube.
Grid voltage around -60 volts will get you about 60mA at 1000 volts per tube.
If you employ fixed (adjustable negative grid bias), you can set the current draw where you want. "Deep Class A" simply refers to the idle current with respect to maximum tube rating.
The data sheet is your friend.
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Follow Ups
- RE: 211 Push pull grid bias - Chip647 06:14:51 05/01/17 (6)
- RE: 211 Push pull grid bias - Triode_Kingdom 07:28:25 05/01/17 (5)
- RE: 211 Push pull grid bias - lovetube 18:34:08 05/01/17 (4)
- RE: 211 Push pull grid bias - Triode_Kingdom 18:48:42 05/01/17 (3)
- RE: 211 Push pull grid bias - lovetube 18:56:38 05/01/17 (2)
- RE: 211 Push pull grid bias - Triode_Kingdom 19:30:34 05/01/17 (1)
- RE: 211 Push pull grid bias - lovetube 19:39:25 05/01/17 (0)
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