[Amps] power supply transformer

[Peter Voelpel]

Direct rectified power supplies will not work with a GFCI, as the neutral
and safety ground must be always bonded together.

On a correctly built direct rectified power supply there will be ALWAYS
neutral/ground hardwired to chassis ground.
This can be forced by a two-pole mains relay which only gets energized with
correct polarity on the wall plug.
The "ground" side of the amp then will never be at 120V above ground.

73
Peter



-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Peter Chadwick

If you run the amp directly off the rectified 117 (or whatever) line
voltage, tehre's an insulation requirement between the drains of teeh
MOSFETS and the RF output winding, which is grounded. Similarly, between the
'ground' side of the amp (which could be at 120v above ground, depending
which way round things are wired) and ground.