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Re: [TCML] 42" Sparks 12/30 - John Freau

These are the specs I was reading.  I have not actually seen any pictures
of it.
What made we look twice was the windings on primary. Sounds like I should
get some more caps and put together a synchronous gap. I bought a motor and
was getting around to making it and putting on my first coil but I saw this
and well my first coil kinda well it is what it is...
I know ive heard negative things on the black tube for secondary(abs I
think), Im going to use the green sewer line pvc. Anything consequential?

On Wed, Mar 1, 2017 at 8:17 AM, Futuret via Tesla <tesla@xxxxxxxxxx> wrote:

> I used a 120 bps synchronous rotary gap on the TT-42 Tesla coil that
> gave 42" sparks.  The design won't work well with a non-synch rotary.
> My tap point is at 14.5 turns if I remember correctly, although I put on
> 21 turns of the 12awg wire.  I used a 4" x 13" spun aluminum toroid.
> Of of the important things to know about tesla coils is that some things
> are important and some are not.  Thickness of the wire, exact sizes,
> etc tend not to be very important as long as their within a suitable range.
> Of course the coil must be tuned properly and coupled up to the right
> degree.  A TC using 0.25 copper tubing will work just as well provided
> everything is adjusted and tuned well.  I just used 12awg wire to show
> that it's not all that critical, and I wanted to build something that
> looked
> rather different.  My old website at AOL and then some other webhosting
> place disappeared.  My transformer is a 12/30 NST, however I had
> taken it apart and removed the tar.  It's a robust older model which
> tends to be a little more powerful than some newer ones.  A newer
> transformer might only give a 38" spark.
> With the 120 bps sync rotary, it's necessary to use a larger tank
> capacitor.  I used 0.015uF.  This is important.  At low bps, you
> need a large capacitor for a large bang size, for large power
> throughput.  Spark length depends mostly on power throughput.
> Do you have the full specs for my TT-42 coil and a photo?
> John Freau
> -----Original Message-----
> From: Guape Sinnelag <amn1t3@xxxxxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Sent: Tue, Feb 28, 2017 11:01 pm
> Subject: [TCML] 42" Sparks 12/30 - John Freau
> Well maybe I'm resurrecting a dead thread, but all of this is still shiny
> and new to this future lifelong coiler(I can already tell). So I have the
> magnet wire on way, 19x 2kv .15uF corniel-dubbliers(butchered it), and will
> be testing my first rotary...
> Assuming I'm correct I should have .0075 uF tank. As to rotary, it is
> uncharted territory. So I might run my Flat RQ gap and my attempt at a
> rotary to see my difference. But my main thought was on the primary. So
> 34th turn(off top my head) was the tap point?
>  I see a lot of intros to coils using .25" tubing .25" spacing at ~15 turns
> for primary and just tapping it till its awesome. So why such the big
> difference? I also noticed it was 12(?)g stranded wire. Does having more
> primary wraps allow better and/or more power transfer? Is there a big
> difference to the spacing between the wire?
> I just redid my first coil and have about 3/8 to .5 gap between turns
> instead of 1/4. It seems less feisty. I changed wiring and primary and have
> attributed my losses(incorrectly maybe) to my primary.
> I want to try ur primary... But what would be the difference if I used an
> avg .25x.25? On your coil specs BTW... I was using my old coil as
> reference.
> There is so much to grasp here all at once... I went from playing with
> arduinos to Tesla coils. I've learned a lot but still am one lost puppy....
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