On Sep 21, 10:03*am, Grumpy The Mule wrote:
The designer of this power supply did something very wrong.
Using the safety/chassis ground as a power connection to
run 120V loads is dangerous. *If you need to power 120V
loads run a neutral line or use a 240/120 transformer.

Safety ground should only be connected to the chassis,
faraday screens and Y-rated capacitors.

Neutral and safety ground eventually tie together so
it seems like an OK thing. *It's not. *It's a violation
of the NEC, any applicable safety standards and might
on the off chance cause serious injury or death.



==============http://www.realhamradio.com/hvreg.pdf- Hide quoted text -

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Yeah its a fool killer, Did you notice how they develop the Vcc.
Im sure under the conditions
its designed to be used its safe enough but if you get enough
hams tinkering with it someone might get killed.
David Smith kind of backed out of the project because of this.

I got sidetracked on this project a bit remodeling my bathrooms
but while prowling through my storage shed(junk box) I came across an
old SMPS, it s rated 48 volts at 50 amps. I was going to build a
big FET amp around it but never did. The output of it is just
rectifiers and filters connected to the transformer. There
is a second winding that is rectified and appears to develop
feedback voltage. I was thinking of building a step up transformer
and connecting it back to back with the transformer on
this power supply. I was also having thoughts of just replacing the
transformer with one designed for HV.