[Home][2021 Index] Re: [TCML] Admin: List status and help request [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] Admin: List status and help request

Hi Steve,

Thanks for the reminder. I'll make sure that the postings are available and if there is a limit on the forum, then will figure out some crawling way of doing it.

Thanks for sticking around so long! :-)
 On Wed, 10 Mar 2021, steve date wrote:

Greetings Chip,

It's been a bit since I've "chipped" in with a response however my concern is that with the existing email system I have been able to save most emails to my hard drive via my client (Thunderbird).  I have thousands of past emails which I am able to search through off-line.
Will a forum approach allow me to continue to collect my data base?
Just bringing this up for consideration.

Here is my first saved email from when I joined the list in 1996:

Subject: Frequency calculations

>From gowin@xxxxxxxxxxxxxxxxxxxxxxxxxxx  Fri Dec 13 11:58:50 1996

Date: Fri, 13 Dec 1996 08:59:12 -0500
From: Dan Gowin<gowin@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Frequency calculations

Tesla List wrote:

>From Esondrmn@xxxxxxx  Thu Dec 12 14:39:51 1996
Date: Thu, 12 Dec 1996 12:51:00 -0500
Subject: Frequency calculations


There was a Tesla Math Formulary published on this list on 8-10-95 - courtesy
of Richard Quick I believe.  I was doing some calculations last night on my
new small coil and found a problem with equation # 6: Frequency of Coil. The
formula given is: F=300,000 / T x W x pi x (.9144 / 36) x 4  where f =
frequency of the coil in khz, T = number of turns, W = width of the coil in

Using this formula, I get a number quite a bit lower (like 40 or 5% lower)
than I get using wheelers equation, caclulating the self capacitance then
calculating the resonate frequency .  I have measured the inductance of my
present coil and the self capacitance and the frequency and know these other
methods work as they should.

Has anyone else tried using this formula?

Ed Sonderman

	In Foster's book on elctromagnetics I use the formulae
designed for circular pole antanae. And, Brent turner uses the
same formula in his book. But It's probably a good idea to calculate
your coils parameters ten ways from sunday. Sorry, I have not
used the "Richard Q." equation.

(1*10^9)    (Fr*d)        = Nt

h = height of coil
d = diameter of coil
Fr = Frequency your shooting for
Nt = Number of turns

Hope this helps.
D. Gowin

Tesla mailing list

Tesla mailing list