Re: fine tuning a secondary coil

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <DR.RESONANCE-at-next-wave-dot-net>


You might also consider going to the website of Richie Burnett at:

    www.Richieburnett.co.uk/tesla.shtml

His primer on basic coil theory is excellent reading for anyone getting
started in TC work.  He also has some excellent analysis of DC resonant
charging systems.  I can't recommend a DC system on a small coil due to the
inherit danger of lethal DC charge on the capacitors after the system is
shut down, but it's a great article for coil design theory.

Best regards,

D.C. Cox

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, July 05, 2002 5:08 PM
Subject: Re: fine tuning a secondary coil


> Original poster: "cd by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<vbprg1-at-hotmail-dot-com>
>
> I was only sort of aware about the height of the secondary over the
primary
> had anything to do with tuning, but when I wrapped my secondary
> I actually may have made another lucky error
>
> I wraped about 20 inches of 26 guage on a 23 inch coil form.(1300 turns on
a
> 4"od clear plexi)
> so
> the bottom turn of the secondary is 2 inchs from the bottom of the coil
form
> this already gives me about 1 and 1/2 inches above the primary
> I also have a spark guard secondary mounting to prevent
> secondary and primary oversparking.
>
> I would like to say
> I ran a few more tests and got about 15 - 16 inch sparks out of my
> orange soda can, and all tests were only run up to 90 percent power. The
> safety gap was set to fire when the variac reached 100 percent....
>
> There was no detectable heat build up
> in any of my components at least none I could detect after unpluging and
> droping caps.
> There was no static charge held by the secondary or at least none i could
> detect.
>
> I ran a test with a florescent bulb to determine EM field range and
> after about 5 feet the bulb did not light up.
>
> It seamed like I could have let the thing run
> for several hours with no ill effects....
> but about 10 to 15 minutes was my longest run
> Is that a long 90 percent run?
>
> I will soon post more pictures Lots of Information and tons of Links at my
> page
> http://home.earthlink-dot-net/~cdowdy2/
>
> I do need more/any information you guys can spare about helping me fine
tune
> my secondary
> so I can get it to work with my top load or torus.
>
> A good queston is If my coil is close to in tune with an aluminum can
> and I add a 16inch 4 inch torus from aluminum ducting....a much more
> capacitive (is that a word?) topload
> would I need to move the turning arm out along the primary
> or in.....im guessing out to increase the em wave size to compensate for
the
> added wire effect from the torus...?????
> Also another question is
> Is my 12000v 30ma neon sign powersuply just to wimpy to break out on that
> torus?
> 15 inch sparks with that ps cant be to bad for a first try :)
>
> Wow! Building was easy Tuning is the HARD part
> but I think I was really lucky during all of it...cause it works :)
> Chris Dowdy
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Friday, July 05, 2002 1:50 PM
> Subject: fine tuning a secondary coil
>
>
> > Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <DR.RESONANCE-at-next-wave-dot-net>
> >
> >
> > Now that you have your coil running and in a state of "tune" then you
need
> > to msnip...