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Re: SCR's

Subject: 
        Re: SCR's
  Date: 
        Fri, 21 Mar 1997 20:55:34 -0700
  From: 
        "DR.RESONANCE" <DR.RESONANCE-at-next-wave-dot-net>
    To: 
        "Tesla List" <tesla-at-pupman-dot-com>


To: Ed Phillips

Have you ever tried using a more expensive oil-filled coil such as an
Accel
Supercoil or the Mallory High Performance coil?  As you mentioned, they
are
more expensive, however, they are already
oil filled and rated to 60 KV operation.  No transformer oil to mess
with
and they should produce a 3-4 inch spark at that potential.  

The capacitor value may vary somewhat to obtain best resonance with the
primary.

I was unable to retrieve you GIF file.  If possible please send it via
snail mail and I will reimburse you for your postal expense.  Please
forward to:

        Joe Corman
        10700 N La Reserve Dr  #16102
        Tucson,  AZ  85737

a member of the group:
DR.RESONANCE-at-next-wave-dot-net



----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-poodle.pupman-dot-com
> Subject: Re: SCR's
> Date: Thursday,March 20,1997 12:32 AM
> 
> Subject: 
>            Re: SCR's
>       Date: 
>            Wed, 19 Mar 1997 20:15:40 -0800
>       From: 
>            Ed Phillips <evp-at-pacbell-dot-net>
>   Reply-To: 
>            ed-at-alumni.caltech.edu
>         To: 
>            Tesla List <tesla-at-stic-dot-net>
>        CC: 
>            Ed Phillips <ed-at-alumni.caltech.edu>
> References: 
>            1
> 
> 
> The attached uuencode GIF file is the schematic of the SCR driver
> I am using for GM high energy ignition coils, of the type obtainable
> at any auto junk yard for about $5.00 each.  (At least here in
> the LA area).  They are in the distributor caps of Olds, Buick,
> and Cadillac V-8's (at least) for the years around 1990.
>         Please note that you have to dope out the connections to the
> coil
> yourself, which isn't too hard.  The HV connection is obvious,
> being the metal plate in the side of the windings.  The other windings
> must be checked out with the ohmmeter.  Note that the low-voltage
> end of the secondary should be connected to one side of the primary,
> or at least not allowed to get more than a few hundred volts away from
> it, 
> otherwise a primary-secondary short will occur.
>         Using this circuit I can easily arc over the coil in air.  I
> normally
> mount them under oil (refrigerator jar) and don't try for over
> about 3" sparks, although the coil will put out more.
>         The 300 volt power supply is a voltage doubler working off the
> 115 volt line, with about 80 ufd capacitors.  The pot adjust the
> repetition rate, and hence the line current and the power dissipation
> in the device.  The repetition rate increases as the pot is set to the
> high voltage end (it won't start oscillating until the pot voltage
> is around 50).  I put a DC milliameter in series with the power
> supply, and make sure I never run much over 100 mils, in order
> to keep the power down.
>         If anyone is interested will publish the voltage doubler circuit
> too.
>         If you try this please let me know results, which are not
> guaranteed!
> Ed Phillips
> 
> 
> BEGIN --------- cut here --------- CUT HERE -------- PART 1/1END
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