Re: output

To: tesla-at-pupman-dot-com
Subject: Re: output
From: RODERICK MAXWELL <major-at-vicksburg-dot-com>
Date: Sun, 19 Jan 1997 13:34:55 -0600
Subscriber: major-at-vicksburg-dot-com Sun Jan 19 14:05:07 1997

Tesla List wrote:
> 
> Subscriber: major-at-vicksburg-dot-com Sat Jan 18 22:32:36 1997
> Date: Sat, 18 Jan 1997 20:29:48 -0600
> From: RODERICK MAXWELL <major-at-vicksburg-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: output
> 
> Last night I ran my coil flat out, full power for the first time.
> After about ten seconds my spark output decreased dramaticaly. At first
> I thought I might have ruined the transformers, but after I turned off
> the coil for a few minutes and tried again spark output returned to
> normal! Does one of the more eperienced coilers know what the problem
> could be? I would like to be able to run more than ten seconds at a
> time.
> 
> 
> 
>      Secondary coil: 4" diammeter x 18" tall  (winding area) polysyrene
>      Primary coil: saucer coil, 30 degree pitch .25" tubing spaced .5"
>      Spark gap: six 3/4" copper tubing 3" long spaced ~.028" apart
> forced air cooling by
>       ac muffin fan
>      Neon transformers: two 7500vac -at- 30ma in parallel
>      Chokes: two ferrite bobbin core chokes wound with ~200 turns 24#
> magnet wire in
>      oil
>      Safety Gap: with center post tied to rf ground
>      Tank Capacitor: .003uf cap made of 1/8" thick poly in vertical
> plate configuration,
>      in mineral oil
>      Resistors: two 50watt power resistors in series with each leg of
> the transformers
> 
> [ Your spark gaps are getting too hot to quench properly.  Try putting
>   another muffin fan next to them and see how that works.  That's my bet
>   anyway.  If the gaps are way hot after a run, then they are causing
>   problems. -- Chip]
> 
  
  Thanks for the info! I'll try that or either try and build a Richard
Quick type spark gap.