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ppppenguin · 26th Mar 2010, 5:19 pm

The smoothers aren't even in circuit with F1 pulled! All that should be energised is the heater dropper, L47 and the heaters themselves. Do some measuring to check that mains really isn't getting to the HT rectifiers.

Possible longshot problem of C111. I think this injects a bit of antiphase hum into the HT and could be short circuit. If it is then some valves will be lit up rather brightly while others may be hardly lit at all. Clip out C111 just to be sure.

26th Mar 2010, 5:19 pm	#46
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Tv62 The smoothers aren't even in circuit with F1 pulled! All that should be energised is the heater dropper, L47 and the heaters themselves. Do some measuring to check that mains really isn't getting to the HT rectifiers. Possible longshot problem of C111. I think this injects a bit of antiphase hum into the HT and could be short circuit. If it is then some valves will be lit up rather brightly while others may be hardly lit at all. Clip out C111 just to be sure.