So I have 2 transmitting triodes in my VT collection:
- GE GL-592 tube
- Amperex 5868 tube
Both of these were marketed as transmitting triodes. So does a transmitting triode work as a Barkhausen oscillator? For the uninitiated, a Barkhausen oscillator is a specialized type of triode which acts as a reflex oscillator. Both the cathode and anode are held negative and the grid is held positive. I noticed that the Amperex 5868 tube is a radial beam triode with a very thick anode that completely shields the cathode. I still need to find a socket for it so I can test this effect using a DC power supply and an oscilloscope.