Re: DIY AC Filter Design Info

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Posted by Lukasz F. on July 15, 2000 at 12:37:51

In Reply to: DIY AC Filter Design Info posted by Jon Risch on July 15, 2000 at 11:36:29:

Hallo Jon

you say:
***************
In some locations, differential mode noise or spikes are quite common, and use of a common mode choke will actually expose your equipment to more
stress and interference than if there were two independant coils/cores. Many commercial/retail designs do not use independant coils/cores because of
costs, and for the much larger inductance they try to use, two completely separate inductors with even marginal current capacity would be costly.
************
My experience is that any spikes and differential noise is not so audible and rather harmless. RFI must be the key to the audible difference the filter makes. The music is not so much free of audible noise, or ticking, pops etc. It sounds just completely different. The timbre and geometry of soundstage changes. So I assume that I do not want to filter the AC to be pure of harmonics, and occasional spikes. The power supply can probably feed happily on distorted AC and use the energy by charging the PS caps. The RFI enters the whole electronics and does something we hear as ugly sound.
I am telling you, that the modified filter does everything the original does so well, plus it sounds more fast, dynamic, open, breathing, etc.
I havent tried all possible cores and techniques. I just try to share what I already found. Other people who tried it as well confirm my opinion.
We can agree, that any one of the designs vastly improves any system, be it NAD or BAT.
Thanks for your input.
Lukasz.

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Follow Ups Full Thread

Topic - REVIEW: DIY by Jon Risch AC filter according to JR Power Conditioner/Surge Protector Review by Lukasz F. at Audio Asylum - Lukasz F. 10:03:53 07/15/00 (22)

DIY AC Filter Design Info - Jon Risch 11:36:29 07/15/00 (21)

Suggestion for you web page, Jon - J Epstein 10:55:11 07/21/00 (1)

Re: Suggestion for you web page, Jon - Ed Sommer 12:50:29 07/21/00 (0)

Please explain doubling - Ed Sommer 16:52:58 07/15/00 (16)

Re: Please explain doubling - Jon Risch 19:54:17 07/15/00 (15)

Re: Please explain doubling - Ed Sommer 09:54:14 07/16/00 (14)

Re: Please explain doubling - Jon Risch 22:21:38 07/16/00 (13)

No doubling measured - Ed Sommer 18:40:17 07/17/00 (7)

Re: No doubling measured - Jon Risch 19:09:10 07/18/00 (6)

The "Big Thing" - Ed Sommer 10:47:16 07/20/00 (4)

Re: The "Big Thing" - Jon Risch 16:58:10 07/21/00 (3)

Re: The "Big Thing" - Ed Sommer 10:47:23 07/22/00 (2)

Examples - Pete Fleming 18:32:28 07/22/00 (1)

Re: Examples - Ed Sommer 10:30:15 07/23/00 (0)

Re: No doubling measured - Ed Sonner 10:38:31 07/19/00 (0)

Re: Please explain doubling - john curl 10:58:22 07/17/00 (1)

Mr. Curl - Ed Sommer 10:31:15 07/18/00 (0)

Still can't see doubling - Ed Sommer 10:30:34 07/17/00 (2)

Re: Still can't see doubling - Allan Moyse 22:25:49 07/18/00 (1)

Re: Still can't see doubling - madalo 16:34:30 07/21/00 (0)

Re: DIY AC Filter Design Info - Lukasz F. 12:37:51 07/15/00 (1)

Input cap is important - Ed Sommer 17:08:57 07/15/00 (0)

Follow Ups

Re: DIY AC Filter Design Info - Lukasz F. 12:37:51 07/15/00 (1)

Input cap is important - Ed Sommer 17:08:57 07/15/00 (0)

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