Re: Re[2]: MONSTER 100kW VTTC - Building now!

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "James" <mustang3-at-cox-dot-net> 

Hi Steve, List
     The grid always has a negative voltage on it. Due to Lenz law (the "dot"
phasing) of the primary coil and tickler coil, a negative pulse is induced
into the tickler coil every time the primary coil conducts. The grid leak
network develops the negative bias. We don't want positive on the grid, this
would turn on the tube too hard. This would prolly be one of those "instant
death" things. The grid goes from 0 volts(or close to 0) to -3000. As all of
us toob TC guys can attest, getting the tickler coil and the grid leak
correct makes a big difference in performance. If anyone wants a boring view
of the grid on the o'scope and some views of the VTTC running on a spectrum
analyzer. Email me. I'll send it to you---must have high speed internet
connection. I sure am glad to see(read) all the interest in the VTTC's. I've
been playing with them since 59. I still have have my 1st toob.

Later,

James

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, February 25, 2004 8:37 AM
Subject: RE: Re[2]: MONSTER 100kW VTTC - Building now!


 > Original poster: "Steve Conner" <steve.conner-at-optosci-dot-com>
 >
 >  >My coils run about -3000 volts on the grid when running at full power.
 >
 > :-0 8--at- K-P
 >
 > 3kV, really? That's a heck of a lot of volts for a grid, especially (since
 > it's self-bias) there must be at least 3kV peak RF signal riding on it.
The
 > grid must be swinging from something like -7kV to +1kV, so I'm surprised
it
 > doesn't arc.
 >
 > Steve C.
 >
 >
 >