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need some help here!




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From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent:  Saturday, January 31, 1998 7:36 PM
To:  Tesla List
Subject:  Re: need some help here!

to: Greg R.

If you are going to run a 12 kV 30 ma xmfr your present tank cap value of
.005 MFD will be a good match.  Be sure to put the spark gap across the
xmfr and run the cap in series with the primary tap.  Do NOT put the cap
directly across the xmfr and then run your spark gap in series with the
primary tap -- this is a great way to damage an NST (neon sign
transformer).  There is a math section in the Tesla group -- perhaps Chip
could elaborate on its address.  You will have to set up a temporary
primary coil using some scrap 12 AWG house wiring -- try around 20 turns
for starters and then scrap off a bare section on each turn so you can tap
down to find the best resonant value.  Be sure to stagger the bare taps
around the primary so they don't flash over (the might if aligned).  Be
sure to UNPLUG the unit before moving the primary tap each time you try a
different tuning point -- it takes more time but is a lot safer.

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


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> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-pupman-dot-com>
> Subject: need some help here!
> Date: Saturday, January 31, 1998 1:30 PM
> 
> 
> ----------
> From:  Greg Rollins [SMTP:trig-at-ptw-dot-com]
> Sent:  Saturday, January 31, 1998 1:09 AM
> To:  'Tesla List'
> Subject:  need some help here!
> 
> Hi Tesla group,
> >    I have this Tesla coil unit that I have to get up and going.  It's
one
> of the "Information Unlimited" coils and I blew up the Xformer. The size
of
> the secondary coil is 12" tall by 3" diameter wound on pvc form driven by
6
> turns of #12 wire. The transformer is the is the question.  
> 
>        I need to pick up a 6KV 20ma Xformer which has to fit in the
> original metal case.  Since it's one of these "Information Unlimited"
Tesla
> coils, the original dimensions were   5.5" by 4.5" and stands 5" tall
> single output terminal with the trans case acting as the other terminal
> ground.  I'm also using a .005 uf cap across the trans with an RF choke.
>    My question is this;   
> >	What if I increase the trans to 12kv and 30ma or 6kv and 30ma what's
> going to happen to the cap values?   where can I find the matching cap? 
> What is the math equations to figure the difference in cap size?    
HELP,
> HELP,
>                          Greg  
>