Re: [TCML] Analysis of VTTC circuit

[Quarkster <quarkster@xxxxxxx>]

Stephen -
 
In addition to the clarifications provided by others, the feedback coil (L2) and the grid leak components (C4, R1) bias the grid to turn the tube OFF, not on. The values of C4 and R1, plus the voltage provided by the feedback coil, determine how long the tube is held in the non-conducting state.
 
Regards,
Herr Zapp

--- On Fri, 9/5/08, Stephen J. Hobley <shobley@xxxxxxxxxx> wrote:

From: Stephen J. Hobley <shobley@xxxxxxxxxx>
Subject: [TCML] Analysis of VTTC circuit
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Date: Friday, September 5, 2008, 10:58 AM

I've been studying the following VTTC schematic, and I think I have a good
grasp of what the different sections do. 
Could I get some feedback as to how accurate my analysis is?

http://www.stevehv.4hv.org/VTTC5/833Aschematic.JPG

C1 + D1 + C2 are rectifying the output of the MOT.

C3 + L1 are tank and primary

L4 + R2 are ballast

L2 + C4 + R1 are the grid trigger components to "switch" the tube on
while energy is detected in the secondary coil

C5 - not really sure, some kind of protection for the tube?

TRIAC + Staccato switch the tube filament on and off at selected rate.

Also, we are slowly gathering the components - does anyone have any of them for
sale?

Thanks,

Steve


 

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