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Negative bias supply problems
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Posted on June 25, 2017 at 15:43:44 | ||
Posts: 453
Location: Ontario Joined: September 20, 2007 |
I found a circuit on the web that uses a 24 volt transformer and a voltage doubler to provide the -32 volts I need. Assembled everything and was able after a few adjustments to get the necessary voltage. Hooked it up to the secondary of the interstage transformer I intend to use and the voltage fell to -0.4 volts. The secondary only measures 400 ohms so what else might account for this drastic drop in voltage? Thanks for any help, this one really puzzles me! |
RE: Negative bias supply problems, posted on June 25, 2017 at 18:24:21 | |
What kinda of filtering are you using on the bias supply voltage? How are the caps wired into the circuit? |
That is why no one could figure it out. Inconsistent. (nt), posted on June 26, 2017 at 16:20:40 | |
Posts: 2633
Location: The South Joined: December 24, 2012 |
So you are getting proper negative voltage on the grids? (n/t), posted on June 27, 2017 at 09:13:17 | |
mt |