RE: Plexiglass Form

To: tesla-at-poodle.pupman-dot-com
Subject: RE: Plexiglass Form
From: Benson_Barry%PAX5-at-mr.nawcad.navy.mil
Date: Thu, 12 Sep 1996 06:48:00 -0400 (EDT)

I sealed my pvc coil form ends with epoxied plexiglas discs and filled the 
inside with dry nitrogen gas.
The discs were shaped so that they fit inside the tube and had a 1/2" rim 
for easy winding.  The end
wires were brought out through holes in the disks and laid along a radial 
groove in the disk surface
(endmill).  The bottom stud was brazed to a rectangular piece of brass.  The 
bottom coil disk
consisted of two plexiglas disks glued together (acetone).  This bottom of 
the top disk was milled
out to accomodate this rectangle.  The end of the bolt with the rectangular 
piece was put
through a hole in the bottom disk and attached with a nut and washer and to 
the lower coil wire.
The top disk was then glued on top of this disk locking the square brass 
stud holder in place.
A little epoxy was also added to the rectangular space around the brass 
piece to keep it tight.
After this hardened the disk assembly was glued to the pvc tube.  This 
procedure was repeated
on the HV end with a longer bolt and 6" bee hive insulator.  I have pulled 4 
1/2' sparks from
the resulting 27" coil form without any tracking problems on the inside.
DATA:  27" pvc tube and winding length
     5 lbs or 1000 feet of #18 B&S gauge magnet wire--MWS heavy formvar
     coating: 5 cans of krylon acrylic spray
     resonant frequency: 250khz,  200khz with 5X20 toroid

                                        Barry

|From: "tesla-at-poodle.pupman-dot-com"-at-PMDF-at-PAXMB1
|To: Benson Barry; "Tesla-list-subscribers-at-poodle.pupman-dot-com"-at-PMDF-at-PAXMB1
|Subject: Plexiglass Form
|Date: Friday, August 16, 1996 11:15PM
|
|<<File Attachment: 00000000.TXT>>
|From SSNSanders-at-aol-dot-comFri Aug 16 13:37:13 1996
|Date: Fri, 16 Aug 1996 14:30:00 -0400
|From: SSNSanders-at-aol-dot-com
|To: Tesla-at-pupman-dot-com
|Subject: Plexiglass Form
|
|The form I have the merchant says is cast. I used a hole cutting bit in the
|drill press to cut a cap for the top and a 6 inch base plate for mounting.
|Both plates will have a hole in the center but no wires on the inside of 
the
|form. Is this an OK design or should I seal the holes completely. Also what
|would be the result of evacuation of the form and putting in neon, any
|adverse effects?     Steve
|