[matspar]

Thanks John,

I think I was being a bit optimistic about a half inch spark, just tried again and its probably about a quarter of an inch. The U25 is struggling to light up as well. I'm getting nowhere fast with this set really...

I tried shorting the crt cathode to chassis just to see if I could get any illumination but again no joy. There's just nowhere near enough EHT being generated. The ion trap is undisturbed, I've loosened it slightly just to break the seal from all the built up grime, but I've resisted the temptation to move it.

If I took a tripler from the anode of the line output valve, after first removing the overwind, how much EHT do you think would be available?
I tried briefly yesterday on the original lopt connecting a tripler to the anode of the EY51, but it just damped the lopt down even more.

Best regards
Matt