Re: Do these numbers look right?

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

Original poster: "June Heidlebaugh" <rheidlebaugh-at-desertgate-dot-com> 

Most hardware suppliers in the United states provide copper tubing in 25, 50
,and 100 ft lengths. Splicing is of no problem for most people using a
solder splice or cutting a small length of tubing length wise and inserting
it inside to provide a support to solder the copper end to end making a
smooth solder joint. Even solid wire can be ground to a angled taper and
soldered into a soothe joint.
    Robert   H
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, February 16, 2004 5:07 PM
Subject: Do these numbers look right?


 > Original poster: JOSEPH CACCIATORE <jocatch-at-us.ibm-dot-com>
 >
 >
 > Hello again. I am well on my way to designing my first TC after giving up
 > trying to restore my old PE magazine coil from 1964. I checked and there
 > are a slew of programs and spreadsheets written to help design a TC.
 > Unfortunately some give different results for the same input conditions.
 >
 > The program I found to be extremely helpful is an Excel spreadsheet called
 > the Tesla Coil Designer 3.0 by Ed Sonderman and Corey Ruch. It is great
 > because you can adjust the secondary/primary parameters and watch for when
 > they come in sync.
 >
 > But never trusting any program fully (i.e., Tax Deluxe say I had an extra
 > $1800 coming back on my tax return, it was wrong!), I was hoping someone
 > could verify and look at these numbers to see if the coil really will
 > perform before I spend all this time, effort and money.
 >
 > If anyone is willing, here are the specs I came up with:
 >
 > NST = 12,000v, 30ma, 60hz
 > Secondary = #22 wire, 20" long, 4" diameter, 765 turns-at-97%
 > Primary = flat spiral, I.D. = 6", 15 turns, .25" pipe, .25" spacing,
 > width=7.25"
 > Capacitor = .007uf
 > Toroid = Dmin= 4", Dmaj= 24"
 >
 > The spreadsheet says secondary res F = 257kh, primary res F = 221khz.
 >
 > My concern is if I use any larger cap, I can't get the prim/sec parameters
 > to match good enough. Also, I don't have any material for a toroid here
 > that I can look at so I assume 4" almunin flex hose but I don't know if
24"
 > is realistic. Lastly, the primary requires 53' of copper tubing. I am not
 > sure where to buy such a long length. I have seen only 25' at Home Depot.
 >
 > Thanks.
 >   JC
 >
 >