Re: [TCML] Rectifying a Tesla coil

["Kurt Schraner" <k.schraner@xxxxxxxxxxx>]

Kurt Schraner wrote:

> Hi,
>
> A cold elecrode tube device, essentially based on the "point and
> plate" principle, is called "Villard Valve", see:
<snip>
> Regards, Kurt

Ed Phillips wrote:

>    Beautiful tube - any idea of the age and intended purpose?  Notice
> the similarity to the Raytheon "B series" tubes - radically different
> electrode geometry in an ionizing gas.  Seems to me I have a Stromberg
> Carlson rectifier here which uses wires for one electrode and spirals
> wound around them for the other.  Haven't seen it for years and may
> not remember correctly.
>
> Ed

Hi Ed,

I don't have any historical information about the tube. It was given to me 
by Mr. Jakob Kuster, who was also giving me the nice big induction coil "Big 
Utz", to be seen at:

http://twfpowerelectronics.com/~kurt/InductionCoils/Farm/InductorFarm.html

Jakob Kuster was a former scientist at EMPA (Eidgenoessische Material 
Prüfungs Anstalt), which can in part be compared to the US NIST. He was 
already >92 (and very sick) in 2003, when he gave me the stuff, in exchange 
to a simple electronic induction coil interruptor, residing in his 
bookshelf, in Ascona (Canton Ticino). Unfortunately I never had the 
opportunity to meet him in person, 'cause he felt too week, and I fear he 
has deceased now. We got the tube and induction coil in Zurich, at the place 
of his older(!) sister Elsa, who was yet teaching piano playing at the 
time...

The answer I wanted to give for the intended purpose was given inbetween by 
Frank, even better than I could have done it. Thank you Frank.

BTW: the size of the tube is 40cm x 40cm (~ 16" x 16").

Best regards, Kurt 


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