What Power isolation transformer or conditioner similar to Topaz

@ gte357s

While researching, I come across a thread from head fi about Topaz isolation transformer with 0.0005pF capacitance.

As for capacitive, capacitance, coupling.
https://belfuse.com/resources/whitepaper/signaltransformer/wp-ST-Controlling-EMI-in-Power-Transforme...  

https://en.wikipedia.org/wiki/Isolation_transformer

Isolation transformers are designed with attention to capacitive coupling between the two windings. The capacitance between primary and secondary windings would also couple AC current from the primary to the secondary. A grounded Faraday shield between the primary and the secondary greatly reduces the coupling of common-mode noise. This may be another winding or a metal strip surrounding a winding. Differential noise can magnetically couple from the primary to the secondary of an isolation transformer, and must be filtered out if a problem occurs.

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MillerCarbon +1 on a great poetic line. Bravo

Capacitance for sure is a red herring. Nothing personal. It swims in a school of red herrings.

I did more searching.  There are quite a few days the balanced isolation transformer (versus linear?) makes a bigger difference.  I guess I will try a balanced one.

I see some isolation transformers on AliExpress.  Although it seems the isolation transformer mainly consists of a giant toroidal, I don’t know if I can trust those.  Like the one below, there is not much information and there is no picture of the  inside.

C$ 143.63 7％ Off | U.S 500VA Toroidal balanced isolation transformer 500W AC isolation power supply processor With 6 outlet socket
https://a.aliexpress.com/_d6XNC5l

https://jandkaudiodesign.blogspot.com/2015/04/audiophile-isolation-transformer.htmlJ&K Audio has a ton of options, from smaller lower end models to higher end ones with expensive transformers.
There is also ones from China. If you search on aliexpress for "PLITRON Isolation Transformers", you'll see a couple that supposedly use actual high quality Plitron transformers for their isolators.

My system was originally powered off a normal house circuit. Then a dedicated direct line. Then that was changed from 120V to 240V with a step down transformer. Along the way, several power conditioners were used. Even more were tried, or compared in other systems. Along the way I learned a lot. The one in there now is a Frankenstein combination of the guts of a good conditioner, some transformers, various outlets like Oyaide and Synergistic, BDR vibration control, and a few other things.
https://systems.audiogon.com/systems/8367
The number one really solid thing I learned in all of this is when it comes to how to choose one there really is no really solid thing to rely on. Capacitance for sure is a red herring. Nothing personal. It swims in a school of red herrings. Current, voltage regulation, on and on. All distractions. What Hitchcock called a MacGuffin. https://en.wikipedia.org/wiki/MacGuffin  Not a one worth a wooden nickel.

What you do, read reviews. Pay attention to how they sound. Only. Nothing else. Not how they are made. Some of the cheapest looking I’ve seen sounded the best. Mine looks like absolute crap but you hear my system your eyes will bug out. Some of them most technologically compelling stories are just that, stories. How does it sound? Only thing that matters.