Re: Oh no - another V4!
Hi Dom.
Have you replaced the G1 coupling cap (0.01uf) to the PL81 and 470k grid leak? Normally you would get a "kink" or a vertical line about one third of the way in from the LHS of the screen when you adjust the trimmer, the other way is to set it up for minimum cathode current in the PL81.
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Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
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