Tube DIY Asylum

RE: A push-pull triode EL84 schematic by Thomas Martens

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Door Nail

In Reply to: RE: A push-pull triode EL84 schematic by Thomas Martens posted by LowRedMoon on May 24, 2009 at 10:16:49

I don't see the 12.75V bias supply.

Follow Ups:

Thanks FenderLover and drlowmu (nt) - Door Nail 19:47:23 05/24/09 (0)
nt
Right - drlowmu 15:36:58 05/24/09 (0)
There is none. That is a test point. Ohm's law, current is voltage over resistance. We have 12.75 VDC over 510 Ohms resistance, going to ground. That is solved as 0.025 A., or 25 mA. current draw through the final tube.

Jeff Medwin
RE: A push-pull triode EL84 schematic by Thomas Martens - FenderLover 13:02:56 05/24/09 (0)
I think this maybe a cathode biased amp and the 12.75V is a read point? Just a WAG.
See how one side has a 100-ohm pot to adjust the bias?

Edits: 05/24/09 05/24/09 05/24/09

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