Wynnytsky
500+ Head-Fier
I bought a balanced isolation transfo on ebay two month ago. Things are much more equal since then. Pretty good transfo, excpet for the fact there is some slight humming from It
I would have expected my P3 regenerator to be my savior but it barely helps with this. Fortunately it has no mechanical noise - it's fan only runs for the first 10sec following powerup.