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Re: Ping Jon On Latest Tweak to Digital AC Line ISO Trans Filter

Les,

The Digital AC Iso Filter was designed to address digital components specificaly, and to address other issues, such as excessive leakage currents when using large caps across the line.

While the original RS transformers are no longer available, othrs of a similar voltage and rating can be used. I would recommend trying to keep the secondary voltage down, and to use a high enough current rating (e.g., 24VAC at 2.5 amps or better, etc.) so as to be able to power most any digital component. The amount of isolation achieved is related to how much capacitance is present across the line, as well as the exact nature of the transformer, for example, toroids ARE NOT recommended, they couple too well, regular E-I core transformers are the best for this kind of application.

Any way, yes, you can use these in conjunction with my AC Line Filter & SS circuit, but I would recommend that they only be used on digital components, due to the In and Out isolation they provide, and the limited power capacity inherent to dropping the voltage down and back up.

Other folks have used higher voltage secondaries, such as diyaudiophile, but these have the disadvantage of requiring full AC line rated caps, and the use of larger resistor values to damp the secondaries, this result is less damping.

For the original info on these:
http://www.AudioAsylum.com/audio/tweaks/messages/43988.html

http://www.AudioAsylum.com/audio/tweaks/messages/44145.html
Steve Eddy schematic (top picture)

my additional "tweak":
http://www.AudioAsylum.com/audio/tweaks/messages/47160.html

Huge thread at DIY AUdio:
http://www.audiocircle.com/circles/viewtopic.php?t=18443


Jon Risch

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