Re: tesla coil current

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

Original poster: John <fireba8104-at-yahoo-dot-com> 

Greetings Dr R,
The Winhurst might be my next project if I can find another microwave oven 
disk- cheap, big , hard to break- under normal conditions, and a bi-product 
of my microwave raiding.
The only real problem with these is drilling the holes. I want to go with a 
sectored Winhurst since I prefer the ascetics over that of the sector-less 
Winhurst. If I'm going to spend money on it, it might as well look good, at 
least to me. Since my mind is set, I'm starboard, will the "shrouded pickup 
electrodes" work with a sectored Winhurst? Also, I'm planning on using a 
dryer motor( a bit much?) instead of a hand crank so your recommendation on 
using copper tubing has been taken into account, as well as everything else 
stated in your post, since I'm going to need all the capacitance I can get 
at dryer motor speeds. When I do get around to it I'll e-mail you,thanks.
I better stop typing because it is most likely getting on Terry's nerves 
considering this is very o.t.
Cheers,
John

Tesla list <tesla-at-pupman-dot-com> wrote:
Original poster: "Dr. Resonance"

If you get to the point where you are serious about the Wimshurst idea, give
me a shout. I've built several of them and the "shrouded pickup electrodes"
style seem to work the best with great performance and very little leakage.

Also, you don't want to use flat metal foils for the charge devices as
corona off the edges limits the output sharply. Use small cylinder of 1/4
inch or 1/2 inch copper tubing with end caps on each end. No sharp edges,
more capacitance, less leakage, and substantially better performance.


Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo WI 53913
----- Original Message -----
From: "Tesla list"
To:
Sent: Wednesday, November 05, 2003 9:19 PM
Subject: Re: tesla coil current


 > Original poster: John
 >
 > Hi Jim,
 > You have just added another project to my long (and growing) list.
 > I guess I'll build the Terry Planar Antenna, that I hear so much about and
 > use the HV probe, when it's built, to measure my Marx and maybe a
Winhurst.
 > Well when I build them.
 > Thanks,
 > John
 >
 > Tesla list wrote:
 > Original poster: Jim Lux
 >
 > At 08:02 AM 11/5/2003 -0700, you wrote:
 > >Original poster: John
 > >Hi Jim,
 > >I know your referring to one of Joule's laws where P = I^2*R. Calculate
 > >the Resistance of the entire secondary circuit at resonance. Input the
two
 > >known variables and solve for I.
 > >This can only give me the maximum current , assuming no losses, but it
is
 > >evident that we are dealing with 19th century technology, a finicky
system
 > >at that, and to assume is to make math useless.
 > >The reason for this inquiry was to have a basics to form a estimate of
 > >minimum resistance needed in a high voltage probe in order to get
 > >reasonably accurate results.
 >
 >
 > IF you want to measure voltages on the top load, the way to do it is with
 > an E field probe. This is! fairly easy to calibrate, as well (you can use
a
 > test signal generator to drive the system at low voltage with enough
 > current to allow use of a standard meter to measure the topload voltage).
 >
 >
 > >I guess the current would in the area of 50 uA RMS . I am very unsure of
 > >this and seeking the advice of people that have been building coils , in
 > >some cases, longer then I've been alive.
 > >Thanks,
 > >John
 > >P.S Jim, I happened upon your site and it now resides in my Favorites
&gt!
;
 > Thanks.
 >
 >