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

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

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, February 23, 2004 6:29 AM
Subject: Re[2]: MONSTER 100kW VTTC - Building now!


 > Original poster: Boost <boost-at-newmail.ru>
 >
 > Hello Tesla list
 >
 > Ος, 20.02.2004 22:37:12 you wrote:
 >  >
 > Tl> Original poster: "James" <mustang3-at-cox-dot-net>
 > Tl>
 > Tl> Hi List,
 > Tl>      Oh, Lord that will be neat. I can't wait to see some pictures of
 > that in
 > Tl> operation. My VTTC runs at 12KW input and it looks grand. The flaming
arcs
 > Tl>
 > Tl> James
 >
 > Hehe ! =))) Yep, sure, you're using two 5868 tubes with this specs:
 >
 > Fmax = 100 MHz
 > Va max = 4000 V
 > Pa max= 450 W
 > Vg max = -500 V
 > Pg max = 50 W
 > Ig max = 180 mA
 > Ik max = 700 mA
 >
 > And run them at 12 kW ! =)))))))
 > Don't Make Me Laugh!


Well.... figure he's running hard core class C bias so he can get 70-80%
efficiency.. Tube's rated at 450W plate diss, 900 for two.. at 12kW and 80%,
he'd be dissipating 2400W.. a mere 250% overload.  The beauty of tubes is
that they can actually take overload without catastrophically failing...
Short life, sure, envelope suck ins, sure, etc.