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Re: Tube Type Tesla Coils



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Hi all,
I am interested in all aspects of Tesla coil and
high voltage design.  The tube, transistor, or mosfet
pulsed tank type coil and the spark gap pulsed tank
type Tesla coil seem very related to me in terms of
the co-illuminating interrelationships that exist
between the two.  The study of both is a synergistic
endeavor.  They all have many more properties
in common than not.  Resonance is a phenomenon
common to them all is it not?
Barry

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From: "tesla"-at-pupman-dot-com-at-PMDF-at-PAXMB1
To: Benson Barry; "tesla"-at-poodle.pupman-dot-com-at-PMDF-at-PAXMB1
Subject: Tube Type Tesla Coils
Date: Saturday, March 08, 1997 1:42AM

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John H. Couture wrote:
>
> To All -
>
> I have noticed lately that sometimes over 50% of the Tesla List postings
> refer to tube type TC's. It should be noted that tube type TC's are not 
true
> Tesla coils.
>
> Tube TC's operate with continuous sine waves from a radio transmitter type
> of power supply. The load on the transmitter is not the usual resistive
> antenna type load but a reactive coil circuit load. This device uses coils
> and capacitors in a much different manner than the way they are used in
> standard Tesla coils. There is no charging of a primary capacitor to 
create
> dampened sine waves like the typical classical TC, etc. This type of
> operation produces brush type sparks and sometimes disruptive sparks
> depending on the adjustments.
>
> The tube operation and the classical coil TC (or magnifier) operation are
> two completely different methods of producing sparks. The standard 
classical
> TC operates with a VSWR of about 10 to 1000 while the tube TC operates 
with
> a VSWR of about 1 to 3 like most radio transmitters. I show a graph of 
these
> two types of operation in the Tesla Coil Notebook. Has anyone tried to
> measure the VSWR of their classical or tube coils? The Corum's said they 
had
> made these measurements but gave no details. I have tried to make these
> tests but did not have much success.
>
> At one time I started to add a chapter to one of my books that would cover
> tube TC's. I soon realized that I could not find enough information on 
these
> devices to develop a method of engineering design criteria that was 
possible
> with the typical classical TC's.
>
> It appears that now there are several coilers that have enough information
> to write a tube TC book and publish it for other coilers interested in 
this
> type of device.
>
> My question is " Should tube TC's be on a separate Tesla List of it's 
own?".
> Coilers who are interested in tube types will then not have to scan thru
> classical coil (or magnifier) postings to find the information they need.
>
> John C.






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