I gotcha lol. I'm excited to see the pictures at some point. I've already
set up my 6.5 for hooking up. It is just needing wound(and afore mentioned
wire). If I wanted to keep with the larger secondary would I also need to
stick with the experimental primary setup? The frequency is determined by
the length of wire that is coiled as I undertand-ish.? I think the bigger
secondary makes the new coil look like it has bigger fangs. I guess that'd
make my question, is there a way to achieve same frequency with less winds
on the primary? I like the copper look and feel. Gives a coil a more
steampunky look to me. But functionality important. Maybe i I should throw
some numbers into jtc.... Help me get a better understanding on the
correlation. But decent sparks on a modest transformer is just too tempting
to pass up. Especially when I may be the only persons in Nebraska to build
a coil lol....
On Mar 1, 2017 18:53, "Futuret via Tesla" <tesla@xxxxxxxxxx> wrote:
> I looked over those specs. I had forgotten about that earlier version of
> the TT-42 coil. The specs you gave were of my old "research coil". I had
> forgotten about the 6" diameter secondary and the 34 turns on the primary,
> but yes that was the research coil. Then I decided to make a more
> compact coil that I called the TT-42. TT stands for Table Top. This
> newer coil is smaller and uses a 4.2"diameter secondary with 19" winding
> length of 28awg heavy formvar magnet wire (about 1300 turns I think).
> The primary is tapped at 13.5 turns, and uses 12awg solid pvc insulated
> telephone ground wire (gray). This was very tricky to wind. It's a flat
> pancake primary. The inner diameter of the primary winding is 6.5". It's
> close wound. I use a 1.5" x 6" toroid directly above the secondary, and
> a 4" x 13" toroid above that, and the 120 bps sync rotary gap. Such
> rotaries have to be phased in by either rotating the motor in it's cradle,
> or using an electronic phase shifter. The tank cap is 0.015uF.
>
>
> Of course you can build the design that you mentioned. Either way
> will work, there's a lot of flexibility for these projects. It's better to
> use the larger tank cap because it keeps the voltage lower. I'm surprised
> the research coil worked as well as it did considering the small cap value.
>
>
> This is all I have at my website at the moment, mostly VTTC stuff.
> I can't find the photos of my TT-42 coil. I'll take new photos and
> put them at the website. You can find my sync gap and phase shifter
> circuit at this website.
>
>
> https://sites.google.com/site/jfuturet/home
>
>
> John
>
>
>
> -----Original Message-----
> From: Guape Sinnelag <amn1t3@xxxxxxxxx>
> To: Futuret <futuret@xxxxxxx>; Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Sent: Wed, Mar 1, 2017 4:15 pm
> Subject: Re: [TCML] 42" Sparks 12/30 - John Freau
>
> http://www.pupman.com/listarchives/1999/October/msg00243.html
> 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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> >
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