Re: Hybrid Solid State Vacuum Tube Design [LONG!]

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

Shad,
That is fascinating. I don't know very much about tubes and virtually 
nothing about VTTC's, other than what little has been available on list 
lately. Where would you suggest I start on my mission to learn as much as 
possible about vacuum tube electronics (shouldn't be too different from SS 
electronics, at least the basics should be the same) and VTTC's? Any 
special web sites? Any books you recommend? Any help would be greatly 
appreciated. I'm still building my first SGTC but I'm always ready for new 
challenges! From the little I have gleaned from the list, it really sounds 
like you have something really special there. Thanks. Best regards.
Paul Brodie
Think Positive

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, April 18, 2005 10:01 AM
Subject: Hybrid Solid State Vacuum Tube Design [LONG!]

> Original poster: Shad Henderson <sundog@xxxxxxxxxxxx>
>
> Hi All,
>
> Please snip unneeded portions when replying!  Terry will Thank You!
>
> With the surfacing of a thread on VTTC's, I felt it was time to spill
> the beans on my little pet project.  Though I can't take credit for the
> whole thing, I'm surprised that I haven't seen the idea posted here
> earlier.  I dub this monstrosity the "SSVTTC", Solid State Vacuum Tube
> Tesla Coil.
>
> The idea is very simple, and the circuit is elegantly simple.
>
> A tube needs negative voltage on the grid to shut it off. Most tubes we
> use have the grids driven positive to turn the tube on "hard" and get
> massive plate current.  The biggest obstacle to running a tube in pulsed
> mode is having a sufficient negative bias to turn it off when it's not
>msnip..............