UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Steve_P · 18th Jan 2012, 12:38 pm

If there are no volts on the anode, then trace it back. You can do thiswith the set turned off and on Ohms mode!

There is a bigger problem here that needs to be sorted. From Pin 2, go back to the Output Transformer. One pin should be lower than the other on the O/P transformer, by about 500 Ohms. The winding you want is about 500 ohms if you go across it. If this is OK, and there's no link to the valve, then follow it through and find out where it's going astray.

If you can't get a reading on the O/P transformer, then it's looking like the O/P transforner is faulty, which will cause the 'No Sound' symptom and also kill the UL41.

There should, at the end of the day, be about 500 Ohms between Pin 2 of the UL41 and Pin 7 of the UY41.

Remember the system ; Start at the Rectifier and go back towards the aerial, putting right each fault as you find it..

Cheers,

Steve P.

18th Jan 2012, 12:38 pm	#106
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Bush AC34, no sound. If there are no volts on the anode, then trace it back. You can do thiswith the set turned off and on Ohms mode! There is a bigger problem here that needs to be sorted. From Pin 2, go back to the Output Transformer. One pin should be lower than the other on the O/P transformer, by about 500 Ohms. The winding you want is about 500 ohms if you go across it. If this is OK, and there's no link to the valve, then follow it through and find out where it's going astray. If you can't get a reading on the O/P transformer, then it's looking like the O/P transforner is faulty, which will cause the 'No Sound' symptom and also kill the UL41. There should, at the end of the day, be about 500 Ohms between Pin 2 of the UL41 and Pin 7 of the UY41. Remember the system ; Start at the Rectifier and go back towards the aerial, putting right each fault as you find it.. Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?