If you are trying to protect YOU and don't have to certify
the solution is going to protect anyone else (eg for
benchtop testing for your use) then a cheap solution can
sometimes be gained by using 2 identical transformers of
suitable power rating connected back to back. ie 110 in xxx
out connected to xxx in giving 110 out. That way, any
identical surplus pair of transformers with a 110 volt
winding may suffice.


-----Original Message-----
From: William Chops Westfield <billw@CISCO.COM>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Monday, 16 March 1998 13:27
Subject: [OT] isolation transformers


>    The *proper* common practice is to connect such a TV to
an isolation
>    transformer before operating it with the back off.
>
>Speaking of which, does anyone know of a source for decent
sized (100-200W)
>reasonably priced isolation transformers?  Since most of my
haunts have low
>voltage logic and stuff, I never seem to run into them...
>
>(The actual application is a high-voltage DC power supply
using a
>variac-style autotransformer (which itself does not provide
any isolation.)
>
>Thanks
>Bill W
>