Re: [TCML] Table top Magnifier

[wysock@xxxxxxx]

David,

Congratulations on your results with this magnifier.  I am petrified, stupified, mortified.
P.S.  Very nice construction techniques and manufacturing.  Truely, a work of art.  Now,
if you were only to put in some more power from your HV source...23 ma. is not very 
much.  Keep on truckin'.

Bill Wysock

From:           	"David N. Van Doren" <DNVanDoren@xxxxxxxxxxx>
To:             	"Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Subject:        	Re: [TCML] Table top Magnifier
Date sent:      	Tue, 18 Dec 2007 19:47:30 -0500
Copies to:      	Send reply to:  	Tesla Coil Mailing List <tesla@xxxxxxxxxx>
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> Thanks Gentlemen It's been a lot of fun.
> For such a simple circuit the Tesla Coil has many layers of complexity.
> For me it's a two sided hobby, 1) The technical challenge of
> studying, understanding, designing and building the Tesla Coil.
> 2) the reword of producing and watching one of the most
> beautiful and fascinating natural phenomenon known.
> 
> I don't know for a fact that the coefiecnt of coupling is .5
> I used physical dimensions and Dr Antonio Carlos M. de Queiroz's
> INCA to calculate K between the primary and secondary.
> The over all coupling is calculated to be K=.18
> On my list of things to do is to build a spread sheet to
> calculate coefiencent of coupling using Terman's Radio Engineering formula.
> 
> The secondary has a 1/4" acrylic tube over it to help with insulation.
> And as you can see in the photos it's still on the edge of do-ability.
> My next tweeks are to try and reduce the corona around the top
> of the secondary the transmission line and the bottom of the Extra coil
> and see if this will improve the output.
> 
> Dave
> 
> ----- Original Message ----- 
> From: "David N. Van Doren" <DNVanDoren@xxxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Tuesday, December 18, 2007 11:19 AM
> Subject: [TCML] Table top Magnifier
> 
> 
> Hello Everyone
> I wanted to show everyone my latest Tesla project.
> A table top, plug and play Magnifier.
> I have photos at this link  http://www.flickr.com/photos/21962809@N02/
> I've always wanted a small table top coil that I could plug in anywhere
> and have a lot of fun with. So I built this coil out of parts I had "in 
> stock".
> I also have been using this as a study coil
> to learn more about theory of opperation. Using LT Spice and Exel spead 
> sheets
> and of corse the Pupman List I have been able to examin it's operation like 
> never before.
> I still have a lot to learn and
> I still have some tweeking to do but this close enough for now.
> 
> Specs are as follows:
> 
> Transformer: Oil burner ignition xformer, 10kv @ 23ma
> Capacitor: 8.9nf mica paper RFcap, 45kv BIL
> Spark Gap: 3 gap quenched gaps, Gap width set to the max!
> Primary Coil: 55uH, 15 turns 1/8 dia cu tube, 8.5" dia .25" pitch
> Secondary Coil: 3.7mH, 200 turns 20awg, 6" dia x 7" long
> Primary/secondary Coeffient of Coupling: .5
> Extra Coil: 24.77 mH, 1083 turns 30awg, 3.5" dia x 13" long
> Top load: Spun aluminum 4" x 12"
> Max spark length: 16-17"
> 
> Thanks everyone hope you enjoy
> 
> David
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> 
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