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Re: Hello to all from a new coiler
From: Chuck Curran[SMTP:ccurran-at-execpc-dot-com]
Sent: Wednesday, September 17, 1997 6:29 PM
To: Tesla List
Subject: Re: Hello to all from a new coiler
Hello Vince:
Sounds like a good start on your coil. I just wanted to pass along that
myself and several others on this list have been very successful with
the green style PVC pipe--I really can't comment on your other material,
just not familiar with it. If you have a section with 3/16" walls I
would spend any time on turning it down to a thinner wall dimension.
You won't be able to "see" any difference. Good Luck
Chuck Curran
Tesla List wrote:
>
> From: Vince Cothran[SMTP:vince-at-techie-dot-com]
> Sent: Tuesday, September 16, 1997 10:50 AM
> To: tesla-at-pupman-dot-com
> Subject: Hello to all from a new coiler
>
> Hello to everyone on the list. I am working on my first coil too. I
> joined the list about a month ago and have been enjoying reading the posts.
> I'm 45, live in Columbia, South Carolina and also enjoy amateur radio, R/C
> aircraft and sailing. I've been fascinated with high voltage and tesla
> coils since boyhood and fondly remember reading articles about the subject
> in Popular Science and Popular Electronics magazines. Several years ago
> someone gave me a 15kv 60ma NST which I promptly made into a jacobs ladder.
> Sadly it's primary function though has been door-stop and dust collector
> but since finding this list and the wealth of info on the web, that will
> soon change!
>
> Here's the specs so far for my coil in progress:
>
> Transformer - 15kv 60ma NST
>
> Primary - 15 degree saucer of 1/4" refrigeration tubing, 10" ID 24" OD
> about 14 turns spaced 1/4" apart
>
> Cap - aluminum flashing and poly plate cap with two sections of .02 mfd
> each, in one tank of acrylic-lined-plywood with an acrylic separator
> between
> the two sections. 35 6" x 8" plates vertically mounted in each section with
> 6 layers
> of 6 mil poly between each plate, all four leads brought out through the
> tank walls.
>
>
> Secondary - 6.5" OD x 25" of 22AWG heavy enamel magnet wire coated with
> acrylic spray
>
> Gap - RQ style static maybe vacuum type
>
> Chokes - still pondering as with the toroid
>
> I acquired some 6.5" OD white PVC at the local building supply house but it
> has a rather thick cellular core, about 1/4" I guess. The trade name for
> it is Conex I believe. I prepared it by baking it in an oven at work at
> about 130-140 degrees for 24 hours and sprayed it while it was still warm
> with some mil-spec acrylic conformal coating called HumiSeal that I picked
> up for a song several years ago at a hamfest. Well I started wondering
> about the breakdown characteristics of this cellular core....the outer skin
> of PVC is pretty thin....i guess 40 to 50 mils......a few days ago I ran
> across some 6" green solid PVC so I bought a piece of it. Now it's down to
> the wire and I'm ready to wind the secondary. Does anyone have any
> thoughts
> as to which material would be best? The wall thickness of the green PVC is
> about 3/16" but I could reduce that fairly easily on a lathe at work if
> losses are
> an issue.
>
> Thanks,
>
> Vince Cothran, KK4NH
> vince-at-techie-dot-com