Re: Variac setting (Was Rd: Rotaty popping)

To: tesla-at-pupman-dot-com
Subject: Re: Variac setting (Was Rd: Rotaty popping)
From: "Barton B. Anderson" <tesla123-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Tue, 02 May 2000 19:14:57 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme


>
> Original Poster: FutureT-at-aol-dot-com 
>
> In a message dated 5/1/00 8:24:03 AM Pacific Daylight Time, tesla-at-pupman-dot-com 
> writes: 
>  

Ed, John, 

Ed what break rate do you normally run at? As John knows, I usually run 240
bps. Maybe John is on to something here. 

Bart 
>
> Bart, 
>
> My work that I reported on below was done with pole pigs and with 
> potential xfrmers (which behave pig-like).  I do not use any ballast 
> with my NST's.  I suspect that lower sync breakrates require a more 
> critical ballast adjustment, and that higher non-sync breakrates are 
> less critical ballast-wise. 
>
> Cheers, 
> John Freau 
> > 
> > 
> >  Bart 
> >  > 
> >  > Ed, Bart, 
> >  > 
> >  > One thing I have noticed is that coils using async gaps are able to 
> >  > run over a much wider range of ballast inductances than low bps 
> >  > sync gap coils.  In the higher bps async coils, the ballast inductance 
> >  > can be used to vary the power output of the coil.  Low inductance 
> >  > gives longer sparks, higher inductance gives shorter sparks.  In the 
> >  > low bps sync gap TC, only a certain inductance setting will give long 
> >  > sparks.  Inductance settings that are higher or lower will reduce the 
> >  > spark output.  I can only assume that it's all a matter of resonant 
> >  > charging or inductive kick charging, and how it behaves at differnt 
> >  > break-rates, and whether it's sync or async. 
> >  > 
> >  > It is interesting that you have the variac inductance set at 5mH, since 
> I 
> >  > believe you said the welder inductance may have gone only down to 
> >  > 10mH, so that is a differnce there.  Of course you also said above 
> >  > that the inductance setting doesn't make much difference at all now 
> >  > to the coil's performance, and that is interesting indeed. 
> >  > 
> >  > Cheers, 
> >  > John Freau 
> >