Re: [TCML] 35 KVA Vacuum Tube Tesla Coil

["Carlos Van Camp" <carlos@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Roger,
Nice job!
I have been using the next valve size up (a 4CX15000a), and it is capable of 
50kw input.
So far I have only put about 35kw into it so we are on a par there...
I am only getting 40" of arcs at best (6 individual brushes of 40" each 
coming of the top electrode), so you are doing well.
Unfortunately I designed the Primary/secondary in the hope of much bigger 
arcs (very long secondary coil) so I think this is my downfall in 
efficiency...
I am planning to rebuild the primary/ secondary arrangement, but first I am 
running a serries of controlled benchtop sized experiments to see if I can 
improve the overall circuit efficiency.
I am trying to get my head around what makes the arcs get fatter with CW 
operation, as oppose to getting longer as with pulsed operation.
The search for the holy grail continues...!

What circuit did you use?

Kind regards,

Carlos
----- Original Message ----- 
From: "Roger Smith" <rwsmith@xxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Monday, July 04, 2011 9:45 PM
Subject: [TCML] 35 KVA Vacuum Tube Tesla Coil


>     I got a hold of a big ceramic triode (3cx10000a3) a few years ago and 
> I finally built a tube coil with it.  It is powered by a 5 KVA pole 
> transformer at up to 35 KVA and I am now getting 50"  fat bushy sparks. 
> Here is a link to the video on it 
> http://www.youtube.com/watch?v=B8536fYHvGM&feature=feedlik 
> <http://www.youtube.com/watch?v=B8536fYHvGM&feature=feedlik>      I 
> haven't seen any other  VTTCs like it so It's hard for me jug the 
> efficiency of it.   Any suggestions are welcome.
>
>     Roger
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla 

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