Overcurrent tube.
I had exactly the same problem.
Yesterday I wanted to ask for advice.
I can advise you....... Today.
Vacuum test in okay. (20 minutes) . Power okay. No other visible problem.
Through it all 2 x or 4 x daily failure. ,,overcurrent tube - 10 or 8"
The entire month..... Twice came Service.
Test the quality of helium and nitrogen - OK.
We tested the volatility of the electricity supply.
All for nothing
We found the cause of the problem.
You disbelieve...... With cooler water leak..... minimum leakage.
Cooler in High-voltage cabinet. Above insulated plate vacuum tube and semiconductor diodes.
Just drop of water which is immediately evaporated.
!!!! Caution - high voltage can kill !!!
Sorry for poor English.
I just repairman agricultural and forestry machinery. From the Czech Republic
![[bigsmile] [bigsmile] [bigsmile]](/data/assets/smilies/bigsmile.gif)
I speak only Flemish, Czech, German and Russian with resistance.
Stanley