Re: Hi ,Im new to the group need to ask a couple of teslaquestions.

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

Original poster: "jimmy hynes by way of Terry Fritz <twftesla-at-qwest-dot-net>" <chunkyboy86-at-yahoo-dot-com>


i used that integral 15/20 20khz transformer for my tesla coil. my tank
capacitance was set at 24nf and it ran at about 10bpsand got 8" arcs to a
floating ball of aluminum foil. for diodes i used 4 flyback transformers that i
had fried. i used the whole thing not just the diodes, because the secondary
was shorted the inductance wasnt a problem. they got hot fast though and would
stop working after about 10 seconds. these transformers are internally
ballasted, like most nsts so a current limiting resistor isn't needed. i would
also recommend getting a new transformer, it was too much of a pain to get this
thing going. i have to get around to getting a 60hz transformer too, i gave up
on the high freq. transformer. 

 Tesla list 
>
> wrote:  
> Original poster: "robert heidlebaugh by way of Terry Fritz " 
>
> Danny: Lets first address your primary problem, steel wire. Copper is 
> non-magnetic and allows a magnetic field generated by an electric current to 
> change quickley. Iron/steel wire holds the magnetic field for a long time 
> preventing a high voltage forming in the secondary. Use copper wire. 2) 570 
> turns is quite low for a secondary ,about half again or twice that number 
> would be better. 3) steel wire primary is bad. use copper tubing or copper 
> ground wire made for power meter boxes. I hope this helps 
> Robert H
>
> > From: "Tesla list" 
> > Date: Sun, 29 Sep 2002 23:37:23 -0600 
> > To: tesla-at-pupman-dot-com 
> > Subject: Re: Hi ,Im new to the group need to ask a couple of tesla
> questions. 
> > Resent-From: tesla-at-pupman-dot-com> Resent-Date: Sun, 29 Sep 2002 23:38:20 -0600
> > 
> > Original poster: "by way of Terry Fritz " 
> > 
> > 
> > Hi I have been trying to use a 15kv 20khz 20 ma neon sign transformer for a
> > small tesla coil but havent had much luck, first the 15 kv is rated at 240 
> > volts im using 120 so im getting approx 7.5 kv also my secondary is 570
> turns 
> > of 28 guage coated steel wire on 2" abs and tried using several home made 
> caps 
> > ,party cup cap, and a big hawg cap (saltwater), my main coil was 6 turns 
> heavy 
> > steel wire.. 
> > 
> > How bad off am I ? 
> > thanks, 
> > Danny L. Ray II 
> > 
> > 
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> JImmy
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