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Re: How dirty is your AC?

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michaelv20850

(A)

In Reply to: How dirty is your AC? posted by Al Sekela on April 26, 2007 at 10:45:03:

Honestly, i don't really know.
Right now, i plug the choke in the second outlet in the the chain. My gears connected to the first outlet in the chain. There are about 10 outlets through out the room and an ajacent room. Luckily, my gear is the only item using power in this circuit line ( i would consider it as a dedicated line).
I think i will one more to see if it gives improvement.
Thanks.

Follow Ups:

Don't be afraid to try the second choke on another circuit, - Al Sekela 20:49:52 04/26/07 (2)
especially if you have contemporary non-audio appliances that may be strong RF noise sources. Things like digital video recorders (TiVo and the like), microwave ovens with complicated controls, high-efficiency furnaces, personal computers, garage door openers with rolling codes, etc., etc., all seem to contain switching power supplies for the computer controllers these days. They generate a lot of RF noise and put it back onto the AC line.
In-line filters for these things can help a lot. Many surge protection power strips also contain EMI/RFI filters.
- Just remember some EMI/RFI filters contribute their own noise - Christopher Witmer 23:30:58 04/26/07 (1)
  I'm hardly an expert but just wanted to remind that some EMI/RFI filters are themselves sources of noise . . . it would be nice to have the ability to calculate and to measure/evaluate just what is really needed to do the job right. Not something I am currently in a position to be able to do.
  Yeah, I know, "Use your ears" . . .
  - Yes, DIY can make a much better filter than you can buy. - Al Sekela 16:34:32 04/27/07 (0)
    There is some benefit with the common surge protector strips, which is why I recommend them. The MOV surge protection devices within them are reported to be noise sources, and the circuit-breakers, pilot lights, switches, and general flimsy construction all make them less than ideal.
    However, they are easy for non-DIY audiophiles to find and install.

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