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RE: [TCML] Hello List, Question Lurks..
Jim,
Jim,
I apologize as well since I had no idea what you were trying to do. We
in Arizona speak English, not Shakespeare. If using a 3 phase xfmr core,
I recommend using the center leg only for the core when converting to
single phase. That way you'll have less saturation due to more core. As
far as level shift, you are still using the same amount of energy,
however, if the duty cycle is, say 50%, you can double the energy into
it resulting in a bigger spark. I recommend using the schematic Chris
sent you of his "Quadzilla 833C" coil. Primary and secondary specs, wire
size, etc. are listed to make your work easier. He has done all the hard
work for you. He experimented with a multiple of secondaries and came to
the conclusion that 833's really like 400~500khz. Quadzilla thumped loud
in staccato mode like a "Huey" helicopter at the Teslathon....very
impressive. Use a small diameter secondary. No need to re-invent the
wheel.
PS: Who cares how much it weighs....It's a tube coil; it's supposed to
be heavy!
Hank
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of Jim Mora
Sent: Friday, August 14, 2009 5:29 PM
To: 'Tesla Coil Mailing List'
Subject: RE: [TCML] Hello List, Question Lurks..
Ha Ha,
Sorry, I apologize for being cryptic. I have been using Sans as in
Sherif
(lacking or without) for a very long time since I worked on early,
dedicated
word processors and carried my Scope to align the 8" Shugart floppy
drives
and worked on Qume and Diablo daisy wheel printers to component level.
No Hank, this is not my first tube coil (12 years old) with my Father;
but,
it is the first time I understand what it actually going on. My first
college electronics classes were on Vacuum tubes with a small mixture of
transistors.
I do want >4KWatts at >4KV on my 833C tubes.
Hank, if you level shift or put (4) MOTS in series/parallel the
effective
relative current is halved. Yes? - unless you are creating energy at
last!
Anyway, I want to rebuild this 3phase transformer to be near saturation
on
the center leg and thus magnetize the two outer legs as well as
possible.
Since it is a symmetrical (all silicone steel legs of equal size, 2"
wide).
It is unclear to me if this will work. I plan on 120 turns of square
#7awg
240v in on the center former which will raise the relative turns ratio
of
the outer #24 or #26 windings. Otherwise, I will have to use my 200lb+
multi-tap dry transformer. Yuk!
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf
Of mddeming@xxxxxxx
Sent: Thursday, August 13, 2009 6:22 PM
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Hello List, Question Lurks..
Hi Jim,
Some?of us old enough to be more literate know exactly what you meant:
running a 3-phase transformer?as single phase one.? Of course not
everyone
has read "Le Voyageur Sans Bagage", printed in sans serif, understood
when
Shakespeare?wrote "my love to thee is sound sans crack or flaw", or been
to
Sans Souci Palace (either the one at Potsdam or the one in Haiti).
Matt D.
-----Original Message-----
From: Dr.Hankenstein <dr.hankenstein@xxxxxxxxxxxxx>
To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
Sent: Wed, Aug 12, 2009 10:06 pm
Subject: RE: [TCML] Hello List, Question Lurks..
Jim,
Exactly what are you trying to do? I've never heard of the type of xfmr
you are tying to use. What do you mean by:" however I tried to tame a 5+
KVA, 3p 4400v transformer sans 3P"; You need to be more specific so we
might be able to help. What is the primary voltage? And what is a "sans
3P"? Does your xfmr have a nameplate? Your message is very cryptic. What
is this "disappointing 1500 volts" you are getting out of a 4500 volt
xfmr? Last time I checked, 4amps x 4000volts was 16kva. Is this your
first tube coil?
Hank
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of Jim Mora
Sent: Tuesday, August 11, 2009 6:58 PM
To: 'Tesla Coil Mailing List'
Subject: [TCML] Hello List, Question Lurks..
Hello Tesla Fiends,
I am still collecting components for my (4x) 833C VTTC. I have almost
everything now. This has been going on for a few years. The target
assembles
are getting close! However I tried to tame a 5+ KVA, 3p 4400v
transformer
sans 3P. I have come to the conclusion that this will not cut the
muster.
Nada. It won't work without a 1256D or so. Not what I had in mind!
So lets see, the triple core is very nearly 8 inches^2 each. So we have
a
disappointing ~1500v * the SQR 3 =~ 4500v. This is still not happening
even
with a 1500V/.707=filtering circuit.
Ok a new approach: I have stripped off the 12wag large number off the
core
legs and made the center a clean former. Understand this was a 24/7
transformer weight in at least 75lbs. All layers were covered in Nomex
which
I salvaged well. I did learn a few things including how to easily
dismantle
an interleaved core in a single session! So here's the question: if I
magnetize the center core verging on the center core kneeing of core
magnetization saturation say with #5awg or #awg6 square magnet wire-
Will a symmetrical core bring the numerous #awg 26 or so wire on the
outer
turns arrive near acceptable magnetized power. I may parallel or series
the
windings as I have a 4" window x 2" winding windows.
Tha
nks for any help!
Jim Mora
PS: I have 4 MOT if this fails, actually six ;-^) This is not my first
choice. Four deliver 2amps either in series or voltage shifted and run
hot!
I want 4 amps@ >4kv. Pig Hugh! Anyone have 4.4kv pig??
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