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Magnifier #13 and a small coil.


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From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent:  Tuesday, March 03, 1998 3:21 PM
To:  Tesla List
Subject:  Re: Magnifier #13 and a small coil.

Hi Richard,
              Thanks for an exceedingly interesting post, 
particularly of the small coil. I hope to have one of my own 
featuring the folded resonator soon (which BTW I fired sshot last 
night with a rather large terminal and no real tuning - in fact I 
stuck on the large terminal to get it closer to tune). After 
difficulties with corona and occasional hot sparks leaping 
between the f.r. and its primary, it looks as if it would be well 
suited to use as a magnifier.

     I see you've well and truly beaten me at the 30VA mark. With 
regard to the magnifier, the 150W/foot at two feet was impressive. 

> From:  richard hull [SMTP:rhull-at-richmond.infi-dot-net] 
> Sent:  Sunday, March 01, 1998 7:49 AM 
> To:  tesla-at-pupman-dot-com
> Subject:  Magnifier #13 and a small coil.
> 
> MAGNIFIER #13 :
> 
> Taking a short sabbatical from my ongoing fusor work,  I have assembled
> TCBOR magnifier #13.  I continues the down sizing tradition starded with
> magnifier #12 and is just slightly larger than its predecessor.  It
> incoporates most of the features which were needed on maggey #12.
<snip> 

> A SMALL COIL:  
> 
> I have long worked with efficient little two coil systems.  I have demoed
> them to the amusement and amazement of many at the Teslathons here.  The
> latest is based on just how much arc one can extract from a small amount of
> energy.
<snip> 

> When tuned and fired in the circuit above, I got 7.8" of arc to a 2" round
> grounded ball.  This was with 48 volts in from the variac and the watt meter
> read 28 VA.   The secret was to take the variac up to where the gap fired
> and then advance it to the point where I got the maximum number of firings
> per half cycle (3-4), and no further.  This occured at 48 volts into the
> transformer primary.
> 
> Pretty stunning performance.  I was able to light a neon tube of 3 feet
> length over 4 feet away from the unbreaking out system.  Fluoresent tubes
> would stay lit a little bit farther away.  This is the best small system I
> have ever assembled.
> 
> 
> Richard Hull, TCBOR

This might be regarded as playing with figures but I calculated the 
internal impedance of the transformer, found the "matching 
capacitance value" and then divided this by the capacitance you 
actually used. I got a result of 8  (firings per cycle?).

     Again, thanks for sharing your results and data.

Regards,
Malcolm