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Old 29th Oct 2018, 2:19 pm   #129
1100 man
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Join Date: Apr 2016
Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK.
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Default Re: Help needed restoring a Murphy V310

EHT discharge is much more likely to happen at low brightness settings. The EHT falls as brightness increases and the tube draws more current from the LOPT.
I doubt the twitching is caused by the LOPT and I don't think your tube has enough emission to disturb the EHT as the brightness is increased!

Dismantling the LOPT would allow you to sort the U26 heater winding and then it can run with the correct valve. I don't think you will see any picture benefits though, and it's a very messy business!
I think tube testing/ rejuvinating would be my next port of call.

Cheers
Nick
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