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Re: Ferroresonant transformer is not good for audio

Hi Jon

I had a big Sola in my home system for a while but I can’t say it made a difference and it did make acoustic noise on its own. It was quickly located to another room.
Here, if a person were wiring a dedicated circuit and plumbing (code here requires steel conduit or BX if less than 3 feet) then the isolator can be located at the breaker box end.

At Intersonics, we were in an industrial park and line voltage usually didn’t look pretty on a scope and varied all over the place during the day. They got a bunch of Sola’s which were used on the test benches and computers and such.
At least by measure, the voltage coming out looked nice on a scope and meter and it ended the issues that existed with the sensitive stuff although being all over the room, there was a steady audible buz if the stereo wasn’t on to mask it, the speaker division made sure it was always on.

A more well thought out answer to the original post would have been to ask a few more questions like “what is the problem you have which makes you consider a dedicated line”. “Is everything on one circuit now?”
Most of the time, when people get desperate and look at the power end, they are chasing hum or noise that while driven by AC, is a result of ground loop currents in the signal cable.
It is unfortunate that hifi isn’t balanced as in Pro but good transformers or circuitry cost more than the unbalanced RCA cable.
In this case, a good AC or signal isolation transformer would provide the rubber glove for a leaky pen fix.


While having a given item may give conflicting result due to additional unaccounted effects (like for example not also having a parallel choke to block common mode noise), I am not clear how having clean quiet constant voltage AC alone, could cause a decrease in accuracy in the performance of the what is connected.
Best,

Tom



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