isolation transformer

Isolating transformers are not eh same animal as small appliance transformers. For the latter, you only need to get up to 12VA to get 15% regulation and 50VA to get 10%. Isos are more typically 500VA or more.

NT

Sola-type CV transformers put out a wretched wave-form. If your connected d evice is sensitive to mains noise, they will not work out so well. They wil l also back-feed noise in some cases.

It is important to understand that a purpose-made isolation transformer is designed not to sag, and is not-ever-never-ever operated at the margins of its theoretical design. They are operated at a limit well below their theor etical capacity for just this reason. Back-to-back kluges are the product o f desperation or a McGyver type with a small brain, emphatically not any so rt of long-term or permanent application.

Peter Wieck Melrose Park, PA

Which is why I have one of their later "Harmonically compensated" models.