Re: newbie questions

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "June Heidlebaugh by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Lance: I am glad to see your posting. I have several TC's I also use rolled
(4 each in paralleled) Poly capacitors ( in oil), and inverted cone primary.
I also use cone secondary made of fiberglass formed on rubber highway
barricade cones. I have the best results using double cones with no problems
powered by a 15-30 NST. I also use input filters on the primary and
secondary of my NST. My tube tc works best with solenoid primary and cone
secondary. My flat primary factions as well as any other ,but takes up a lot
of space. I have had a problem with PVC coil forms and polyester coating if
I don't pre coat the coil form with a solvent based coating to make the
polyester stick well to the coil form because the copper/ poly ester/ PVC
have different expansion rates and come apart as temperature changes. My
main secondary is also # 24 wire, space wound.
-   Robert  H---- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, July 23, 2003 8:36 AM
Subject: Re: newbie questions


 > Original poster: "Chris Roberts by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <quezacotl_14000000000000-at-yahoo-dot-com>
 >
 > Hi Lance,
 > Well, in response to the large secondary question, there is no limit to
how
 > little power you need to put through a certain size of coil. The main
 > reason that you don't see little NSTs  powering a gargantuan coil is the
 > fact that the sparks would be proportionally tiny
 > and nobody wants little 2 foot sparks coming off of their 15 foot tall
 > coil. =D That and the fact that such a large coil is much more cumbersome
 > than a smaller one. Unfortunately, it dosen't work the other way around,
so
 > no hooking your pole transformers up to those little 1 inch secondarys. =D
 >
 >
 > Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "harry by way of Terry Fritz "
 >
 > Hi
 >
 > My name is Lance Williams , I am 36 yrs. old and I live in British
Columbia
 > Canada , I have a basic understanding of electricity and electronics,I
have
 > been lurking on the list since Xmas, in that time i have built a coil with
 > the following specs:
 >
 > -3" dryer duct toroid 16" dia. oa. a bit small but the kids prefer it over
 > the 4"(lots more sparks :)
 > -14 turns 1/4" copper tube primary spaced 3/8" apart 45deg. inverted
 > conical 8" id. 19" od.
 > -4.25" pvc secondary form 30" long with 25" winding of 24Ga magnet wire.
 > -powered with 2 12/30 nst's (soon to be 4 :)
 > -static gap 1"copper tube 6" long 11pcs. for 10 gaps at .02" each and 2
MOV
 > fans for quenching.
 > -2 homemade rolled poly caps .022 uf ea. in series and an ESR of 19 and
18.
 > -#4G! a welding cable for a ground wire to a 10' copper clad ground rod.
 >
 > With this setup i am achieving 26" continuous spark w/o breakout point and
 > 32" w/ breakout points.
 >
 >
 > Now for the questions:
 >
 > -Can the ESR of the caps be lowered by wrapping it tighter and would there
 > be any improvement in performance of the coil ?
 >
 > -What does "zero crossing" mean ?
 >
 > -Out of curiosity I modified a couple of old washing machine induction
 > motors (1725 rpm) to run synchronous, the second one runs a little hotter
 > but seems to be starting and locking into sync ok but the first one has
 > trouble starting and when it does it can run in either direction and gets
 > very hot .Neither motor has cap. start ,just a start winding.I removed
 > about 1" from the rotors on both motors (4 flats).Does anyone know if
there
 > is a way to save this motor or is it junk ?
 >
 > - I have some 12.5" Dia. pvc sewer pipe that I could use for a secondary
 > coil could some! one tell me what the minimum power requirements would
have
 > to be for such a coil ?
 >
 > THANK YOU to all who contribute to this list it has been very educational
 > for me and has sparked ( pun intended) a renewed interest in electricity
 > for me .
 >
 > Lance
 >
 >
 >
 >
 > -Chris
 >
 >