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Station X · 10th Jan 2012, 11:54 pm

Final thought for tonight. The heaters appear to be wired in brown wire. Is it possible that the voltages on pins 1 and 8 of the UL41 are in fact AC rather than DC?

Assuming that the heaters are wired as shown for the AC34, then everything points to a break in the heater chain between V4 and V5. This is unlikely though so check the heater continutiy of all valves as suggested.

10th Jan 2012, 11:54 pm	#47
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Bush AC34, no sound. Final thought for tonight. The heaters appear to be wired in brown wire. Is it possible that the voltages on pins 1 and 8 of the UL41 are in fact AC rather than DC? Assuming that the heaters are wired as shown for the AC34, then everything points to a break in the heater chain between V4 and V5. This is unlikely though so check the heater continutiy of all valves as suggested. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.