RE: " Insert a "hash" filter"

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Posted by Eli Duttman (A) on July 31, 2012 at 17:10:35

In Reply to: RE: " Insert a "hash" filter" posted by Gingertube on July 30, 2012 at 21:14:52:

Even when zero switching noise Schottky diodes are employed, an issue remains to be dealt with, if high value caps. are installed in the doubler stack. Large amounts of capacitance imply a tiny conduction angle and a highly "triangular" ripple waveform. Per Fourier's Theorem, such a waveform contains high order harmonics of the ripple fundamental that extend well up into RF. The winding capacitance of a commonplace PSU filter choke is a short circuit at RF. The "hash" filter eliminates the crud that would sneak past the "routine" filter choke.

BTW, the "hash" filter also disposes of garbage riding on the AC mains.

Eli D.

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - 4 pole caps in a voltage doubler circuit - DAK 17:28:20 07/29/12 (14)

RE: 4 pole caps in a voltage doubler circuit - Gingertube 21:05:05 07/30/12 (1)

thank you for the info (nt) - DAK 01:41:38 07/31/12 (0)

RE: 4 pole caps in a voltage doubler circuit - mikeyb 11:01:15 07/30/12 (1)

RE: 4 pole caps in a voltage doubler circuit - DAK 18:45:50 07/30/12 (0)

RE: 4 pole caps in a voltage doubler circuit - Chris O 18:24:08 07/29/12 (9)

RE: 4 pole caps in a voltage doubler circuit - Eli Duttman 18:55:00 07/29/12 (8)

hash filter - DAK 08:56:32 08/01/12 (0)

" Insert a "hash" filter" - Chris O 07:54:30 07/30/12 (6)

RE: " Insert a "hash" filter" - mikeyb 10:52:37 07/30/12 (1)

RE: " Insert a "hash" filter" - Jim McShane 09:22:32 07/31/12 (0)

RE: " Insert a "hash" filter" - Jim McShane 10:49:45 07/30/12 (3)

RE: " Insert a "hash" filter" - Gingertube 21:14:52 07/30/12 (2)

RE: " Insert a "hash" filter" - Eli Duttman 17:10:35 07/31/12 (0)

I ALWAYS Do (nt) - Jim McShane 09:19:31 07/31/12 (0)

Follow Ups

RE: " Insert a "hash" filter" - Eli Duttman 17:10:35 07/31/12 (0)

Post a Message!