Must of sent my email around the same time... My questions were answered
before I even reopened my mailbox.... I'll do some fooling around... That's
half the fun anway. Lol. Thanks for letting me pick your brains, and the
pointers in the right direction. Hopefully I'll end up with a coil worth
posting about. :)
On Mar 1, 2017 19:31, "Guape Sinnelag" <amn1t3@xxxxxxxxx> wrote:
> 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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