Even Better

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Even Better

If you follow the schematic shown here but use a dropping transformer to take 240VAC input down to 120VAC, it becomes cleaner yet.

The primary price is having a 240VAC outlet installed or converted from 120VAC nearby your installation (by a fully qualified electrician). 10 amps is enough though 15 is nice. The dropping (2:1) transformer may not be more expensive than a simple isolating transformer.

The one change to the schematic that is absolutely necessary is fusing the second hot input to the transformer. In the schematic as shown, that line is the 120VAC neutral, but with 240VAC that is now 120VAC antiphase, and hot.

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Follow Ups Full Thread

Topic - Jon Risch Balanced AC Instructions..Anyone? - triodesteve 05:59:15 07/06/21 (13)

RE: HAVE BALANCED -- Jon Risch Balanced AC Instructions..Anyone? - jad 10:30:04 07/06/21 (12)

How about for an SU2? - triodesteve 18:29:39 07/17/21 (5)

RE: How about for an SU2? - jad 08:34:43 07/20/21 (4)

RE: How about for an SU2? --FOUND THIS THAT MAY HELP - jad 09:14:00 07/20/21 (3)

RE: How about for an SU2? --FOUND THIS THAT MAY HELP - triodesteve 06:59:31 07/21/21 (0)

RE: How about for an SU2? --FOUND THIS THAT MAY HELP - fastcat 09:28:58 07/20/21 (1)

RE: How about for an SU2? --FOUND THIS THAT MAY HELP - jad 07:48:43 07/21/21 (0)

RE: HAVE BALANCED -- Jon Risch Balanced AC Instructions..Anyone? - jad 03:31:13 07/09/21 (1)

Me too - Batman 14:36:28 07/09/21 (0)

I drew that! - Batman 19:09:08 07/08/21 (0)

RE: HAVE BALANCED -- Jon Risch Balanced AC Instructions..Anyone? - MikeWI 15:10:31 07/06/21 (1)

Even Better - Skip Pack 10:23:25 07/07/21 (0)

RE: HAVE BALANCED -- Jon Risch Balanced AC Instructions..Anyone? - triodesteve 14:12:50 07/06/21 (0)

Follow Ups

Even Better - Skip Pack 10:23:25 07/07/21 (0)

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