RE: Interesting residual charge

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Garry Freemyer by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Garry-at-NDFC-dot-com>

Ok, here's a stab at it from an angle I haven't seen anyone stab at it from
before .... 

Take an alternating current source of say a million volts with little
current. The voltage as I understand it, raises to +1M volts, and then drops
through zero to Negative 1M volts. 

So, the charge on the secondary and anything coupled to it, take on this
alternating positive and negative charge.

Since time the charge spends at zero, is very miniscule, it is likely that
when the tesla coil is turned off, the secondary and your friend is also
charged positively or negatively at some voltage at that point.

Now you've turned off the power, and your friend is still charged because he
is standing on an insulator.

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, December 21, 2000 11:28 AM
To: tesla-at-pupman-dot-com
Subject: Interesting residual charge


Original poster: "Christopher Telford by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <christophertelford-at-yahoo-dot-com>

Hello All, 

I know the topic of residual charges in the coils
ended a while back, but i have had an interesting
experience today. Me and my friend john where
experimenting (ok, playing) with my tesla coil. He was
standing on the insulated plastic box taking arcs to a
metal object in his hand whilst i manned the switch. I
know this is a bit of a stupid thing to do, but it is
only a low powered coil with a 450W input. After i
switched the coil off, i reached up to take the metal
object from his hand and got a shock from it. Is this
normal? The AC from the coil should not leave a
changre like this. My coil is a very normal spark gap
style thing. 
If anyone has any thoughts on this i would be
interested to hear them. 
Oh, yeah, and we got several shocks from the
secondaries when we were packing them away.

Thanks, 

Chris Telford


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