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RE: KVA Model 9J
Original poster: "Ross Overstreet by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ross-o-at-mindspring-dot-com>
Hi Justin,
I think you are getting kVA and TTR confused.
The website you referred to (http://www.ttr-dot-com) is wholly owned by Bill
Wysock of Tesla Technology Research. TTR is a one man show with Bill at the
controls. Bill has been playing with coils since 1965, he has been making
museum quality coils since 1975, and has been running TTR since 1987.
kVA Effects is wholly owned by Jeff Parisse and Jeff's web site is
http://www.teslacoil-dot-com/
Unlike TTR, kVA is composed of a team and is a much younger company. Bill
is one of the kVA team members and his Model 13M is pictured on the kVA site
under equipment. I don't think any of Jeff's gear is pictured on Bill's
site - I didn't find any...
The numbers that you quote are found on Bill Wysock's Model 9 page.
See http://www.ttr-dot-com/model9_page2.htm.
You'll have to redirect this question to Bill. I'm *guessing* the 5KVA
refers to a 5KVA pig that is being severely abused :-)
Jeff's Model 9J was inspired by Wysock's Model 9. The coils are about the
same size but they are NOT carbon copies of each other. I'm guessing that
Jeff's 9J was built about 12-15 years after Bill did his original Model 9
research. Note that Bills coils have no letters on the model numbers
(except Bill's maggies which have an "M"). Jeff's coils always have a "J".
Go to Jeff's site and click on equipment.
Here is a summary of "designed by Jeff" coils.
-----
10J
25 ft, 240V, 100A, therefore 24KVA or 1.04 ft/KVA
9J
16 ft, 240V, 75A, therefore 18KVA or 0.88 ft/KVA
8J
12 ft, 240V, 50A, therefore 12KVA or 1.00 ft/KVA
-----
I'm betting that Jeff's numbers are "reliable" arc lengths and not the
occasional long streamer that all coilers sometimes measure on a cold night
with no wind, a full moon, and after torturing the Edison voodoo doll. Keep
in mind the numbers on his page are used to size power requirements so it
only makes sense to publish medium arc length values and high power demand
values.
A 9 ft arc with 6KVA in (1.5 ft/KVA) is really good!
Most people never get the Freau empiracle equation of 1.7*sqrt(VA).
You are getting very close (9ft vs 10.9 ft). Congratulations.
Best Regards,
Ross Overstreet
Austin, TX
-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, October 06, 2001 10:23 AM
To: tesla-at-pupman-dot-com
Subject: KVA Model 9J
Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Pyrotrons-at-aol-dot-com>
Hello All.........
I have never asked kVA Effects' staff a question about their equipment as
many times as I have wanted to. I know ya'll are very busy, and I have not
wanted to distract. Please allow me to publicly ask one question, one that I
have been wondering about for at least a few months now.
Alright - I've seen and made all kinds of different coils in all kinds of
different configurations. In every case, I make a comparison between two
things: 1). How it's made. 2). How long the sparks are. We all know this is
the key to making a better performing coil.......
It is stated on kVA Effect's website at www.ttr-dot-com that the model 9J arcs
17
feet with 5kVA of input power. (I think this coil is on the other site too,
I'm not sure).
And my question is ----- how was this done? There must be something at work
here.
This kind of efficiency (especially in a larger coil system) is quite
impressive to say the least. How was the power measured? Is this an
amp-clamp
on the input to the pig, or a calculated value?
Perhaps this is some incredibly careful selection of components values (ex.
cap size and break rate) that work together perfectly. I notice several
wonderful things (on the website) that are apparent in all of kVA's coils.
Just at a glance, I notice that a standard "high-current RF" wiring
technique
is used which includes short, heavy wiring from component-to component and
"modular" construction. Also, all key components are massively overrated for
efficiency and lifetime. What I'm curious about are things that are NOT so
evident in the pictures, which contribute to the 9J's efficiency.
Let me know so I can see WHY our coil arcs 9 foot with 6kVA in. ; (
Take care, thank you.
Justin Hays
KC5PNP
G-3 #1150
Email: pyrotrons-at-aol-dot-com
Website: www.hvguy-dot-com