RE: Still another spark gap Idea

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

Original poster: "Vanderputten, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gvp-at-pvaintl-dot-com>


Here is the simplest and cheapest way I have found to make and RQ pipe gap
for my 1000 W coil; this took me about an hour to build with perfect gaps:

1" copper 
2" diameter pvc/lexan tube or pill bottle (works fine).
4.5" diameter lexan or pvc pipe.
Epoxy
4" muffin fan
Thick rubber band
Business cards
Feeler gauge

Steps

1. Cut pipe cut into 2" lengths, preferably with a tube cutter; sand and
polish each piece
2. Determine gap between pipes to meet your specification; I used .025"
3. Determine how many business cards equals the gap
4. Lice cards into 2" x .5" and make as many 'decks' as there are gaps
5. Mix the epoxy and make a thin bead the length of each pipe.
6. Attach each to the 2"  pipe and hold in place with the rubber band
7. Wedge a deck of cards between each pipe, being careful of the epoxy
8. The rubber bands will pinch all pipes together at exactly the correct
gap. Let sit overnight.
9. When cured, remove rubber band and decks.
10. Place the unit inside the 4.5" pipe with the muffin fan fashioned on one
end.
11. All one need do is rig up connections - I use alligator clips.

In use, this SG runs cool; the epoxy has held up well and the gaps stay
aligned.
Good luck!

Gary 


 -----Original Message-----
From: 	Tesla list [mailto:tesla-at-pupman-dot-com] 
Sent:	Saturday, September 08, 2001 1:44 PM
To:	tesla-at-pupman-dot-com
Subject:	Yet another spark gap Idea

Original poster: "Vince D'Amore by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<vincedamore-at-earthlink-dot-net>

Hello people. 
 
 This is another idea or variation of mounting configuration for spark gaps.
I intend on trying this one and will post results when I do. I am fairly new
to
this so 
any input or ideas are always welcome. Mostly I just think this would be
easy to construct. 
 
It consists of 
 
1  Three inch dia. by 10 inch length PVC or ABS 
1  Three inch PVC or ABS end cap.
9  1/4 inch bolts by 1 inch length
9  1/4 inch nuts
9  1/4 inch washers
9  tungsten bushings 
 
Construction theory 
 
1) make a 1/4 inch slot starting at 2 inch from the end of the pipe and
ending
2 inch before the other end.
2) repeat this for the opposite side of the pipe so you have two slots
completely through the pipe.
3) mount each bolt, bushing, washer and nut through one of the slots.
4) The opposite slot will be used for air flow and ease of adjustment.
5) after this is done set and check the gaps between the tungsten bushings.
6) mount the end cap on one end of the pipe 
7) connect the other end of the pipe to a shop vac for air cooling and spark
quench.
 
 
 
Vince