Re: New Testing

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: New Testing
From: Tesla List <tesla-at-stic-dot-net>
Date: Mon, 15 Sep 1997 23:39:40 -0500
Approved: tesla-at-stic-dot-net

From: 	DR.RESONANCE[SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: 	Monday, September 15, 1997 7:29 PM
To: 	Tesla List
Subject: 	Re: New Testing

To: Ed

Another possible consideration --- are your high freq RF filter chokes
mounted under your primary coil (or within a few feet)?  If so they will
pick up a high potential RF signal that could blow some components.  We
also learned this lesson the hard way many years ago.  Now we mount all of
our "filter" components in a separate HV power supply box that is usually
10-15 feet away from the oscillator base itself.

DR.RESONANCE-at-next-wave-dot-net



> 
> From: 	Esondrmn-at-aol-dot-com[SMTP:Esondrmn-at-aol-dot-com]
> Sent: 	Monday, September 15, 1997 12:36 PM
> To: 	tesla-at-pupman-dot-com
> Subject: 	Re: New Testing
> 
> In a message dated 97-09-13 09:03:10 EDT, you write:
> 
> << Ed,
>  
>  If the rotary is firing only erratically, this isn't a symptom of 
>  improper primary tuning. If the protection gap across the cap is firing
>  at a 1" setting, you have a significant problem with gap firing. Until
>  you identify the problem, you may want to reduce your safety gap setting
>  a bit, since breakdown of a 1" gap represents considerably more than 25
>  KV AC. The combination of the rotary and the static gaps is apparently
>  resulting on too high an effective breakdown voltage. In effect, you're
>  "missing" more presentations than "hitting". Because of the high speed
>  air-flow around the rotary electrodes, a rotary gap's breakdown voltage
>  will be significantly higher than for an equivalent static gap. 
>  
>  Now that you've tightenned up the gap spacing on your rotary, also try
>  temporarily removing the series gaps and run only off the rotary, and
>  try running at a mechanical breakrate of at least 360 - 480 BPS so that
>  you get at least 3 - 4 presentations per half cycle. By reducing the gap
>  spacing, you should arrive at a point where your system runs smoothly
>  without the safety gaps firing. You can then gradually increase the
>  setting via the series gaps until you're just below the point where
>  erratic firing (or safety gap firing) begins.  Depending on ballast
>  settings (particularly with no damping resistors across your welder) you
>  can get really horrendous transient conditions (4 - 6X the incoming 14.4
>  KV) which won't take out your pig, but can take out your cap.  
>  
>  See if this helps at all, and the best of luck to you Ed!
>  
>  - Bert H. --
>  
>   >>
> Bert,
> 
> I now have the static gaps out of the circuit.  Thanks for the tip, I
will
> reduce the safety gap across the cap to maybe .50 to .75".  All I need
now is
> some decent weather.
> 
> Ed Sonderman
> 
>