In rec.audio.pro, James Boyk wrote:

Ben Bradley wrote:
I suspect you're talking about electrical leakage from a power
transformer (or power line RF filtering caps) in a piece of equipment
with an ungrounded chassis, and leaky power transformers causing a "60
or 70 volt" difference between different equipment. Your lack of
quoting Scott's previous message may have caused some confusion among
other posters...

You are right. I did indeed mean that I can apparently feel the voltage
"absolutely," which is weird. Others don't feel anything.

It's the body capacitance. The human body, standing in insulating
shoes, is effectively (if what I recall from another group is correct)
about 100pF to ground. Put about 50V of 60Hz through a 100pF to
ground, and [doing the calculations] a couple of microamps goes
through it, perhaps barely enough to be felt. I recall that such a
small 'vibrating' current is easier to feel if you lightly rub your
finger across the chassis rather than just press your finger against
it.
Maybe others were wearing shoes with thicker soles (were they going
out for disco dancing?), perhaps giving them less capacitance to
ground and less current flowing.

I try to keep my posts to at most one screen total, but it tripped me up
this time. Sorry. My apologies.

James Boyk