Re: John, I read your previous post from the link

Cable Asylum

Interconnects, speaker wire, power cords. Ask the Cable Guys.

In Reply to: John, I read your previous post from the link posted by Tanker on July 18, 2006 at 16:09:00:

The Super Quick & Dirty Digital Isolation Transformers use the fact that we are stepping the voltage way down (almost 5 to 1), and then back up again, to place a very large capacitor across the step-down and the step-up middle section. This means that a UL rated cap is not as necessary, and a larger value cap can be used than could be placed directly across the line, since there would be no leakage current at the component AC output.
Placing a large cap across the line where the AC power goes into the audio component, can cause a large leakage current to exist, which may or may not become an issue, either for AC ground loops, or for safety reasons.
pkmap was talking about doing something similar if you had an isolation transformer BEFORE the balanced power transformer (one with sufficiently higher rated powr capacity than the balanced transformer to avoid loss of overall power capacity and dynamics), by placing a moderately large (but AC rated/UL listed cap shunted across the transformers, across the 1st transformer (nominally the larger rated iso) secondary, and the second balanced power transformer primary.
Even though the voltage is at the full AC power line level, you would still get benefit of the elimination of the leakage currents, AND the balanced power as well.
In either case, the larger than 'normal' cap would help filter down to a lower frequencyu, and quite possibly filter more hash from the line (going in OR out).
The Super Quick & Dirty Digital Isolation Transformer circuit was designed to help keep the digital components line radiated EMI/RFI from geting to the rest of the system just as much as it was designed to keep EMI/RFI on the AC powerline out of the digital component.

Jon Risch

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Follow Ups Full Thread

Topic - Calling Jon Risch regarding Balanced Power conditioner - Tanker 04:25:06 07/15/06 (7)

Re: Calling Jon Risch regarding Balanced Power conditioner - Jon Risch 17:21:06 07/16/06 (6)

Thanks John, you're right about - Tanker 22:14:53 07/16/06 (5)

Re: Thanks John, you're right about - Jon Risch 21:13:06 07/17/06 (2)

John, I read your previous post from the link - Tanker 16:09:00 07/18/06 (1)

Re: John, I read your previous post from the link - Jon Risch 22:16:37 07/18/06 (0)

Cascading Isolation/Balancing transformers - pmkap 06:03:43 07/17/06 (1)

Thanks for the post, pmkap - Tanker 16:03:32 07/18/06 (0)

Follow Ups

Re: John, I read your previous post from the link - Jon Risch 22:16:37 07/18/06 (0)

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