Re: Micro coil earthing

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

Original poster: "Jason Petrou by way of Terry Fritz <twftesla-at-uswest-dot-net>" <jasonp-at-btinternet-dot-com>

My ultra mini coil has a resonance of about 650KHz - way higher than nerves
can react to. It hurts like heck if you get his for 2 reasons:
1) you still get that really unpleasent buzz that you get from shocks
2) it burns on the contact point

Regards,
Jason

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, April 30, 2001 12:01 AM
Subject: Re: Micro coil earthing


> Original poster: "Matt Shayka by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<flyboxboy-at-hotmail-dot-com>
>
>
>
>
> >From: "Tesla list" <tesla-at-pupman-dot-com>
> >To: tesla-at-pupman-dot-com
> >Subject: Micro coil earthing
> >Date: Sun, 29 Apr 2001 14:00:42 -0600
> >
> >Original poster: "Dr. Duncan Cadd by way of Terry Fritz
> ><twftesla-at-uswest-dot-net>" <dunckx-at-freeuk-dot-com>
> >
> >Hi All!
> >
> >
> >First my apologies for any unanswered emails - my email connection
> >"dissolved" Thursday and has only just come back.  I now have 186
> >emails to read ;-)
> >
> >I've been playing with my induction coil driven TC, all 15W of it, and
> >much to my surprise I discovered that it is really, really picky when
> >it comes to earth connections.  I hadn't used it in a while, and had
> >forgotten how I'd wired the earth so assumed I used my ham radio earth
> >(copper rod in wet earth outdoors) - wrong!  Very poor sparks.
> >Instead, what I had done was to connect the earth lead to a couple of
> >large mild steel cases in the shack.  Much better sparks ;-)
> >
> >I assume that this has something to do with the shortness of the lead
> >to earth (inches instead of yards) and the fact that whatever charge
> >gets pushed to earth in one half cycle gets "sucked back" on the next
> >half cycle.  Anyone else seen anything similar with a TC, big or
> >small?  Comments?
> >
> >Dunckx
> >Geek#1113 (G-1)
> >
> >
> >
>
> Yes, i have. I'm a fourteen year old and i built a TC out of scratch. It
is
> power by a 10kV 23ma OBIT and it has a 2 3/4" by 12" secondary. My first
> ground was an 8" long wood spike driven in the ground. I then took a four
> foot copper rod and sank that. The output increased by 2".
> So now i am getting a total of 5" sparks off this coil to a grounded rod.
I
> don't know what frequency it resonates, but it hurts like the devil when
you
> touch it. I also noticed that the streamers took on a more opaque
appearance
> rather than the skinny, flashy sparks that i got before. Hey, if any one
has
> an old NST out there i welcome donations- OBITS suck!
>
>     -Matt
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