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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: Negative bias supply problems posted by vetmedrobert@gmail.com on June 26, 2017 at 06:29:09:
It looks like you're minimum voltage occurs when the 25k pot is effectively shorted. I would rather not vary the current draw on the negative rail depending on its output setting. Also, 15k and 47k looks to have a minimum output slightly more negative than 40V...so I am not quite sure how you get this pup down to 32V. It could be that the 15k/10 uF RC is knocking down a lot of ripple, and that there exists plenty of it at the 47 uF doubler stack.
I tend to want more capacitance than you have shown...like 10x, and at a minimum 5x...:)
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
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Follow Ups
- Calculation - PakProtector 09:09:35 06/26/17 (1)
- RE: Calculation - vetmedrobert@gmail.com 09:42:36 06/27/17 (0)
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