[Prev][Next][Index][Thread]

Re: Just a FEW questions from a newbie



Tesla List wrote:
> 
> Subscriber: pdalinis-at-xnet-dot-com Sat Jan 11 10:48:22 1997
> Date: Fri, 10 Jan 1997 12:20:47 -0600
> From: Peter Dalinis <pdalinis-at-xnet-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Just a FEW questions from a newbie
> 
> Tesla List wrote:
> 
> > >For my first coil, I am looking for a design that gives off 1 foot
> > >sparks.  If I get more, that
> > >is fine too :) What secondary size am I looking at?  2feet long by
> > >3inches dia?
> 
> > For 1 foot sparks, You could use a 15KV, 30 or 60 ma Neon transformer.
> > These are cheap and readily available. Just call or go to any local sign
> > shop that deals in Neon signage and ask them what they do with their old,
> > out-of-warranty neon sign transformers. Some places just throw them out
> > because they can't sell them without providing a warranty of some kind..;)
> > However, most places that I have called usually keep the old ones in a box
> > in the back room and save them for teachers, instructors, COILERS, anybody
> > who wants them. They usually let them go for a small fee ($10-$25).
> > On the size: The best height-to-diameter (h-d) ratio for coils under 8" in
> > diameter is around 4:1. So, if you're making a 3" dia coil, it would be
> > best to use a height of 12".
> 
> I have heard lots of differnt stuff on this... everything from use 26awg
> -at-
> 18inches... to useing 22awg -at- 12"....  Am I just going to waste wire
> by having it too long?  Or bring the 1/4wave frequency down too much?
> 
> 
> > >Capacitors.  Will doornob caps work a-ok?  Perhaps a few in series and
> > >parrallel?
> > >Where can I go about getting some?  (no worthwhile hamfests in winter in
> > >chicago)
> >
> > There is a great surplus company called "All electronics". They
> > occasionally get some high-voltage products in for pretty good prices.
> > Example: in their summer '96 catalog (the last one i got...they're not very
> > good at sending out the latest ones...;) they have HV Mica caps from 600V
> > to 2,000V in 3 different styles in values from .0003 to .02 MFD for 25
> > cents each! Their # is 1-800-826-5432.
> 
> I called them for a catalog.  I assume that these caps will work?
> about what am I looking at for a target cap value for this curcuit?
> 5mf, .5mf, .05mf, etc..?
> 
> > >Spark Gaps.  I found some docs for a rotary one, and a stationary one.
> > >The stationary
> > >one looks easier for me to build is it ideal (airblast.txt)?  Will an
> >
> > I have that very same text file. It came with a .GIF that illustrated how
> > it was built. That may work fine for you, however it is very noisy and the
> > electrodes don't last long. Unfortunately, neither an aquarium pump or a
> > airbrush compressor provide enough airflow to effectively "quench" the
> > spark. The result is the gap electrode life is dramatically shortened. The
> > best design I've seen for a stationary spark gap is one designed by Richard
> > Quick. It's affectionately referred to as the Richard Quick spark gap (go
> > fig). I can send you construction details if you're interested.
> 
> Please do send this to me... I appreciate it...
> 
> Once again, THANKS!!!
> 
> Pete
> 
> X-Mozilla-Status: 0010
> Content-Length: 2079

Pete - when you get those plans, could you send them to me, also?

Thanks
-- 
Nathan Lamphere
randyl-at-ronan-dot-net