Finally got power and tuning to enable long runs. Tube glows very dull red after a few minutes run and stabilises with forced cooling. The single mot with doubler doesn't heat up appreciably. Doubler diode is nice and cool as well.
40 turns primary .5mm
12pf 25kv Vacuum Capacitor tank
300 turns secondary .5mm
30 turns .25mm feedback
1kohm grid with 0.01uf mica 6kv
5kv diode 200ma with 3300pf 4kv bypass
0.95 2200vac mot cap in doubler
100pf 25kv ceramic mot bypass cap
Frequency unstable 800khz to 1mhz
Blown up countless diodes and other components.
One more thing you need a tank capacitor or the primary will resonate with the transformer and the intercapacitance of the tube and pop diodes or short out the transformer.
Going to leave as is with no more mods.
EDIT: After a blown MOT I added a rf filter to the ground of the MOT and used a rf ground for the secondary. I also added 3.3nf 12kv across the MOT. I also addes a safety gap across to MOT for overvoltage protection. I hope this will be enough rf and overvoltage protection.
No comments:
Post a Comment