wrote in message
ps.com...
Thats interesting - whats a stopper in the anode circuit? The
combination of a resistor and an inductor? And if the tube does take
off at 3GHz, will I get fried by the microwaves??!

VHF oscillations will develop extremely high RF voltages since the
tank coil will look like a high impedance RFC and there will be
no load. Expect to see a lot of arcing.

Pete