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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: RE: Heaters in series? posted by vetmedrobert@gmail.com on August 6, 2017 at 11:51:39:
So that brings even more complications, lol. The output tube has 3.75V of bias on the filament and some additional negative grid bias while the driver stage is biased at 11.25V with 0V of additional grid bias.
In this schematic the 22K resistor loading the 0D3 could be a 10W part and work just fine (5W is marginal). I don't know why it's drawn as an adjustable, that's strange. You do need one 0D3, loading resistor, and bypass cap per channel though.
The schematic is also missing the bias supply and the 20V filament supply. Again there's a weird 6 Ohm 25W adjustable resistor, not sure where you're going to buy that.
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Follow Ups
- RE: Heaters in series? - Caucasian Blackplate 19:22:32 08/06/17 (1)
- RE: Heaters in series? - vetmedrobert@gmail.com 20:41:36 08/06/17 (0)
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