Hi Rob,
I think two wires side by side has been done before. The limitation is
the number of turns you can put on the coil as you've probably looked at.
The form is fine. I've used both thick and thin without problems.
As far as programs, Javatc is absolutely the most accurate program.
Teslamap is a neat program as far as a nicely formatted calculator and
doesn't have the layout limitations that we have with Javatc
(html/javascript). But from an accuracy standpoint, Teslamap is
several years behind the times. Old Javatc 9.1 and the late John
Coutures JHCTES program were both run exactly like this in the early
days of programs for TC use (forced to using top load error
percentages, etc.). Both of those were spin offs of Ed Sonderman's
spreadsheet. Javatc has always set the bar high. Teslamap is still
using old methods, but they do get you in the ballpark. There is a
problem in Teslamap with the secondary capacitance (way off). But,
just a calculation error I suspect. The other numbers are fine I guess
without nitpicking too much. The top load is the big problem in
Teslamap. Teslamap can't predict the effects of external capacitance
(including the topload). The best it can do is calc the isolated C and
allow an error value which you can input. I checked a coil with
Teslamap just now and it required a 30% reduction to get close to the
actual measured value. This is no surprise. I remember being forced
into the same limitation years ago in Javatc.
Javatc has stood on the shoulders of giants. Thanks to the TSSP and
Paul Nicholson specifically, Javatc does account for most of these
situations and many others not even attempted by other programs.
There's no reason that Teslamap couldn't do the same (but Kevin would
need to do some major updates, and that is a daunting task). Doing
these programs is far more difficult than creating a spreadsheet
calculator.
Javatc is simply my way of giving back to the community of coil
builders. No profits or anything of that nature. I am by no means
dogging Teslamap, so please don't misinterpret. Teslamap is fine for a
general Tesla Coil calculator and has the best format I've seen. But
when a question is raised about accuracy, Javatc wins hands down
because it has always "kept up" with the knowledge base of Tesla Coil
physics.
Javatc input data is designed for "no limitations". Thus, you can
experiment freely with various spacing ratios, h/d's, geometries, or
whatever (and you will be handed more information than you will know
what to do with). That is of my own doing. Most of the outputs are of
my own choosing and the things I look at in a coil design. Javatc is
actually written specifically for "me". I chose to make it available
for all. I have always maintained this attitude with Javatc. Imagine
if you wrote a spreadsheet for your own TC calculations. Same kind of
thing, except I put it up on the web for others to use also.
Best regards,
Bart
Robert Davies wrote:
What do you all think of using two wires side by side like say a red
and green 20ga soldered with silver solder at the ends but rolled
up the coil together as one?
If you haven't guessed I have acquired my secondary form. I have
several pieces of 12" 10" and 8" sch 40/80 pvc water main/sewer pipe
, yea a little heavy on the sch but the price is right "Free".The 12"
is the blue type, I would guess that color doesn't matter?
I have also been using the available TC design packages such as
JAVATC and TeslaMap. Is one any better than the other or should I use
both and and split the difference between them? I have noticed some
different numbers each produces with the same input parameters.
Rob
KI4HXT
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