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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: Do i have a problem with the cathode bias circuit? posted by DAK on August 16, 2017 at 16:27:17:
The voltage at the cathode is only bias voltage if the grid is referenced to ground.
Otherwise the tubes will just run away, they have no bias voltage to stop them from doing so.
Bias voltage is how much the grid is negative WRT the cathode.
With the grid not grounded (referenced to ground through a grid resistor) the tube is not "seeing" the bias voltage.
Tre'
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Follow Ups
- RE: Do i have a problem with the cathode bias circuit? - Tre' 16:32:22 08/16/17 (5)
- Ok, i understand that better now. - DAK 17:05:59 08/16/17 (4)
- RE: Ok, i understand that better now. - Stuben 04:04:15 08/18/17 (1)
- Another reason why you should use a variac. - DAK 09:30:53 08/18/17 (0)
- You're welcome. (nt) - Tre' 17:28:28 08/16/17 (1)
- RE: You're welcome. (nt) - FenderLover 21:36:28 08/16/17 (0)
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