Using a Vacuum Tube as a negative resistor in a Tesla Coil?
My question concerns the posibilty of using a Triode/Tetrode/Pentode as a spark gap in a Tesla Coil. I want to know if it is possible to configure a simple circuit that will detect the volatge in the capacitor and discharge it when it reaches full charge.
I want to do this so that I can create a good impulse current in the primary and also because I want to make the tank ciruit efficient by eliminating losses through resistors and capacitors.
I have a GU 81m and a 12kv Vacuum Capacitor and a MOT as the power supply.
I would like to either use the spark gap style Tesla Coil circuit or create a relaxation oscillator. I know this is possible with a Thyratron but I don't have one just yet.
So the ciruit should operate as a LC ciruit and discharge the capacitor once no current flow towards it. I would prefer not to use a feedback coil.
Any help would be great.