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Votage doubler safety
Votage doubler safety
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Old 16th September 2020, 01:30 AM   #11
TonyTecson is offline TonyTecson  Philippines
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why not just use a simple voltage double and use the center voltage to supply the screens? i do that all the time.....i even use chokes at the center voltage tap where the two caps meet....

i try to avoid complicated situations as much as i can...
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Old 16th September 2020, 01:32 AM   #12
TonyTecson is offline TonyTecson  Philippines
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Quote:
Originally Posted by dgta View Post
Wait just a second.



The answer to that question is yes. But that's not what you have. You don't have "one secondary" and the "other secondary". You have one secondary with multiple taps. That's a different kettle of fish. You need to make sure it's properly designed and wired. As said, you have a short in there.

Make sure it's all correct and run a sim if in doubt. Otherwise things can go boom ouch.

yes, and he can learn it the hard way....i did once and never going there again..
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Old 16th September 2020, 01:33 AM   #13
Tom Bavis is offline Tom Bavis
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The "half-wave" doubler circuit could be used, or two, one from each tap. The "full wave" doubler shown can't share a common with anything else on the transformer.

Last edited by Tom Bavis; 16th September 2020 at 01:36 AM.
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Old 16th September 2020, 10:38 AM   #14
Eli Duttman is offline Eli Duttman  United States
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Half wave multipliers have been mentioned. The half wave parallel topology works quite well, providing adequately large caps. are employed.
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Old 16th September 2020, 03:05 PM   #15
Palustris is offline Palustris  United States
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Quote:
Originally Posted by Tom Bavis View Post
The "full wave" doubler shown can't share a common with anything else on the transformer.
Thanks, that's what I suspected, I just wanted confirmation.
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Old 16th September 2020, 03:18 PM   #16
gideon1990 is offline gideon1990  Netherlands
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If it is just for the screen supply why don't you take an OD3 or other VR tube and feed that of your main B+? It'll be extremely stable
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Old 16th September 2020, 03:51 PM   #17
dgta is offline dgta  United States
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Here you go. Blue trace is a bit hard to see, around 340V
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Old 16th September 2020, 05:11 PM   #18
Palustris is offline Palustris  United States
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With the current (external) power supply, I am using two OD3 off of the B+ and that works fine. I am building a new power supply for the amp with greater current capability and the second set of taps off the secondary was tempting me to use them.

The half wave doubler appears to be a practical approach.
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Old 17th September 2020, 12:27 AM   #19
TonyTecson is offline TonyTecson  Philippines
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Quote:
Originally Posted by dgta View Post
Here you go. Blue trace is a bit hard to see, around 340V
yes, this is how to do it...
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