To: mail11:;-at-cimcad.enet.dec-dot-com (-at-teslatech)
From: I am the NRA <pierson-at-cimcad.enet.dec-dot-com>
Date: Thu, 1 Dec 94 12:32:46 EST
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>TE>> Given the frequency, coil size, and number of turns, find the
>TE>> inductance. Then calculate the capacitance that is needed to make the
>TE>> LC secondary circuit oscillate at the desired frequency.
>TE> hmmmm? Usual secondary has no capacitors, per se. Soem model it as
>TE> the inductance and teh stray capacitance. Some treat it as a helical
>TE> resonator. The second apprach is the one i fancy, as do the Corum's.
>Your explaination of the way to go about "designing" a Tesla coil
>is excellent. How many have you made ? :-)
none. Scratch that. One. When i was about 9. With some help.
But i do design, i think i understand design methodology and and i
know i understand RF.
And i have listened ot the Corum's & Others.
>TE> Matching [the primary] to power transformer secondary is nice, but
>How would one actually achieve this ?
I skimped that because:
a) I dont think it significant to results
b) I have heard it explained once, a long time ago, and not
by someone i was sure knew what they were talking about...
As i recollect, the derived an "impedance" fro the output of the power
transformer as Vout/Iout, then matched the impedance of the Tesla
primary plus reflected seconndary to that. This feels odd to me.
Dunno. (& yes, i understand the usual cases of, for & about
impedance matching. This one seems odd...)
>TE> I reccomend TC TUTOR, by the Corum brothers, runs on a PC. There
>Where would I buy this program from ?
High Energy Enterprises, associted with ITS had it.
Lindsay may have had it.
>TE> are other desing sw packages that may be of assistance. For
>Can you give us a short list of the software thats available ?
No. Sorry. There is at least one more.
>TE> understanding Corum's Vacuum Tube Tesla Coils is good. Poor title
>TE> as it is about key elements of ALL coils.
>I've seen others reference this book (e.g Richard Quick). Is it
>available in "good technical book" stores or must I go to some
>specialist shop only ?
ITS, maybe lindsay. Not sure if it is available generally.
>TE> DO not skimp on secondary wiore size. #22 is ok. Some do #30. Too
>An acquaintance of mine wound a coil by winding two wires onto a
>former next to each other (these's a special term for that -
Bifilar. Tho, in detail, that can mean something slightly different.
> When fully wound he placed the coil upright then
>let one of the ends go. In very short time he had a coil with
>neat spaced out turns ! (and a lot of useless wire at his feet) A
>layer of epoxy finished it off. He gets a 3 foot arc from 8Kv
>input. The secondary is about 4 feet high and 10 inch diameter.
Yep. One can use string, or anything for the "dummy" winding.
>TE> Consider making mechanical arrangements for a tertiary coil...
>Are you talking here about a "magnifier" coil ?
Yep. Fergot that buzzword.