In article , Dave Plowman
writes
In article ,
Tim Mitchell wrote:
This was an el cheapo 14" colour portable, currys own brand, bought
about 5 years ago. Chassis is at 120V above ground. Such designs are
definitely still out there.

How are you measuring it? With a high impedance DVM you'll often get such
readings as there could well be will be small value resistors etc from
mains to chassis for RFI reasons. But the current they could supply is so
little as not to be a safety hazard.

No, it really had some umph behind it, I was trying to make an audio out
terminal. When I plugged something into it, I blew up a whole range of
audio equipment, and nearly killed myself.

I later worked out the circuit diagram, it basically involved extra
transformer windings and a 120V zener diode. The set is RF input only,
no other connections (and now I know why).
--
Tim Mitchell