Re: Static Gap Spacing

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Eric,

At 05:11 PM 12/3/2001 -0800, you wrote:
>Terry,
>I was wondering how do I know where to put the long pipe to start? I mean
>with a 15kv/30ma how do I know what is too much voltage and what happens if
>I put the long pipe to far back? Also I'm wondering what type of transformer
>you're using with this gap, will I need 60 sections for running it with my
>transformer(15/30)?

I used it mostly with my 15/60 NST.  I only had 0.004 inch gaps which is
too small.

Just run the gap with the bare NST.  Without any caps or anything connected
to the NST, it will output 15kV exactly.  Find the furthest point that will
still allow the gap to fire and you know that is at the max firing voltage
for your NST.


>Also I'm curious as to how you grounded the long safety pipe, is it gorunded
>to the same grounding rod as the primary or to a seperate one or what?
>Thanx

I ground it to the case of the NST.  I also ground the case of the NST to
the RF ground.

Cheers,

	Terry


>-Erik
>----- Original Message -----
>From: Tesla list <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Monday, December 03, 2001 4:08 PM
>Subject: Re: Static Gap Spacing
>
>
>> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>>
>> Hi Erik,
>>
>> You may want to check out the following for ideas:
>>
>> http://hot-streamer-dot-com/TeslaCoils/Misc/terrygap.jpg
>>
>> Glueing the pipe sections down with fast drying epoxy and spacing them
>with
>> some consistant spacer may be far easier that screws.  Be such it will
>stick to
>> your plastic base first.
>>
>> I will leave gap width sugestions to others that do not live at high
>> altitude...  But "I" would space each with playing cards that add to about
>the
>> thickness of a dime.  But trust others on this more than me...
>>
>> Cheers,
>>
>>         Terry
>>
>>
>> At 04:01 PM 12/3/2001 -0800, you wrote:
>> >
>> > Hi,
>> > I'm making a static gap out of 12 3" peices of 1" copper pipe all screwd
>into
>> > lexon/lucite in a row and I'm wondering if there is a way to know how
>big to
>> > make the total gap width (i'm using a 15kv/30ma transformer) also how do
>I
>> > know how big to set my safety gap? This is my first coil so a good
>> > explanaition or reference to one would be a great help
>> > Thank You
>> > Erik Kettenburg
>>
>>
>>
>>
>