RE: Vacuum Tube Tesla Coil Design (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 11 Oct 2007 18:33:13 -0400
From: Nick Andrews <nicothefabulous@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: RE: Vacuum Tube Tesla Coil Design (fwd)

I would like to see the schematic as well.  I have an old linear amp I got
that has 4 4-125A tubes in it that I got just for this reason.  Thanks.

Nick A 

> Date: Wed, 10 Oct 2007 19:45:17 -0600
> From: tesla@xxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: Vacuum Tube Tesla Coil Design (fwd)
> 
> 
> ---------- Forwarded message ----------
> Date: Wed, 10 Oct 2007 23:43:59 +0200
> From: Martin Damev <mdamev@xxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Vacuum Tube Tesla Coil Design (fwd)
> 
> Hello Tony, Matt and all...
> 
> Concerning two 4-400 tetrodes in a push-pull configuration:
> 
> Please be a little patient.
> My HP Scanner gave up completely so I
> decided to draw the circuit with GNU Eda
> schematic Editor for Linux . This program gives
> me some real headache. But I'm confident
> that I will have a schematic for you in a couple
> of days.
> 
> The circuit is just a design proposal. The
> push-pull VTTC already mentioned with two
> RCA 7843 tetrodes works well. It's performance
> is ok, it could be better if the coupling between
> secondary and primary would be tighter. But
> its owner doesn't want to make changes to the setup.
> 
> Push-pull oscillators with tetrodes aren't exotic.
> I designed and built a prototype 170 MHz-oscillator
> with a 12 watt-double tetrode (type QQE 03/12 or 6360)
> as demonstration model for showing the physics of
> electromagnetic waves. Dipols and Lecher-lines can
> be coupled to it. It works very well and the customer,
> the physics department of a swiss university is very
> happy with it. It too uses capacitive dividers for feedback.
> 
> Before I defintely decided to build my VTTC with a triode,
> I planned a VTTC with two 4-125A or 6156 tetrodes. The reason
> for changing my mind and switching to a single power triode
> was that I got two new BBC T 380-1 triodes from a fellow valve
> collector.
> 
> Will send you the schematics as soon as possible.
> 
> - Martin
> 
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