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Station X · 18th Jan 2012, 9:23 pm

If it's R17 it will be colour coded yellow, violet, yellow 470K.

If it's measuring 686K it's gone high in value and could do with replacing. Don't worry about it for the moment though, just reconnect it.

Right leave the speaker and magic eye plugs disconnected for the moment. Switch on and check whether any valves light up. There should be NO valves lit.

If valves are lit switch off and come back here for further advice.

If NO valves are lit, switch off and reconnect the plugs. Meter on DC volts. Negative lead to chassis and positive lead to UL41 pin 6 (Control Grid). Switch on. If reading rises to more than 2V come back here for further advice.

If reading is less than 2V take voltage readings on all pins of UY41 and UL41. Report results here.

18th Jan 2012, 9:23 pm	#117
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Bush AC34, no sound. If it's R17 it will be colour coded yellow, violet, yellow 470K. If it's measuring 686K it's gone high in value and could do with replacing. Don't worry about it for the moment though, just reconnect it. Right leave the speaker and magic eye plugs disconnected for the moment. Switch on and check whether any valves light up. There should be NO valves lit. If valves are lit switch off and come back here for further advice. If NO valves are lit, switch off and reconnect the plugs. Meter on DC volts. Negative lead to chassis and positive lead to UL41 pin 6 (Control Grid). Switch on. If reading rises to more than 2V come back here for further advice. If reading is less than 2V take voltage readings on all pins of UY41 and UL41. Report results here. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.