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Buck Boost




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From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent:  Sunday, February 01, 1998 10:10 PM
To:  Tesla List
Subject:  Re: Buck Boost

to: Greg

Not really big --- our commercial units measure 8 x 6 x 4 inches and run
with pole pigs up to 10 kva.  The resistance, although small, does really
help smooth things out.

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: Buck Boost
> Date: Sunday, February 01, 1998 2:36 PM
> 
> ----------
> From:  Gregory R. Hunter [SMTP:ghunter-at-mail.enterprise-dot-net]
> Sent:  Sunday, February 01, 1998 10:06 AM
> To:  Tesla List
> Subject:  Buck Boost
> 
> Coiler Types,
> 
> I've been reading the mail about current limiting strategies for
> pole pigs, and I think I'm finally seeing the light.  
> 
> (1) A really big series choke or variable reactor (arc welder, etc.)
> is required to limit current when the spark gap is firing.  
> 
> (2) Series resistors are required to prevent excessive current at the
> beginning of each charging cycle (when the empty cap feels like a
> short) when the spark gap is not firing.  
> 
> (3) The proper combo of choke and resistors yeilds a smooth
> charge/discharge cycle without excessive current draw.  
> 
> Does all that sound reasonable?
> 
> One writer explained that the 230VAC line voltage will divide across
> the choke impedance and pole pig primary impedance, preventing the
> pole pig secondary from developing full potential.  I'm thinking the
> choke/reactor will only drop a modest fraction of the line voltage
> during the charge cycle.  Could this be corrected using the buck
> boost trick with a hefty low-voltage power transformer?  Is the 
> voltage drop worth worrying about?  Just wondering.
> 
> Greg
> 
> Infatuated With My New Pig in East Anglia, UK
>