After the topic of power supply was clarified, I searched for the best RF transistor for this project. It should be robust and affordable. I discovered the SD2933 from ST which is still available but no longer produced. More interesting seemed to me the VRF2933 from Microsemi.
|Drain Source Voltage||170 V||125 V|
|Drain Current||42 A||40A|
|Gain||22 dB||20 dB|
|Power||300 W||300 W|
|VSWR all Phases||70:1||3:1|
That looked already good, to get the VRF2933 unintentionally
broken seemed almost impossible and also Dick Frey, developer
at Microsemi, does not manage it in a really breathtaking
video. Who also raises the voltage to 65VDC to get a whopping
600W out of a MOSFET and then pulls sparks with a screwdriver
at the output at 1200W!
Note, however, that this was a pulsed signal and not CW.