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Old 31st March 2010, 02:43 PM   #1
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Default How to get 120v isolated from lm3886 power supply

I have a kit with a 22-24vac X2 (havent load tested it yet) transformer. I also need to get 100-150vdc for the B+ of my tube buffer. Since its a tight fit i really dont want to install yet another transformer in the case. Could i use just a full wave voltage doubler to get the B+ from the dual 23vac secondaries?

File:Full-wave voltage doubler.svg - Wikipedia, the free encyclopedia

I figure that will get me about 130vdc.
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Old 31st March 2010, 04:28 PM   #2
star882 is offline star882  United States
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You can definitely use a voltage multiplier. Or you can use a boost converter.
"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
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Old 1st April 2010, 10:39 AM   #3
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Location: Jackson,michigan
a voltage quadrupler will get you 124v to 135v but only use the positive side winding If you are going have a split supply. jer
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