UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Stella ST113U- distorted sound causes ?

Tim · 12th Jan 2019, 8:31 am

Are you sure it's a 330 ohm? If it is it may have been replaced in the past, or upped in an attempt to tame an already faulty UCL82

Check out the two capacitors in the mini diagram above too. C24 is the grid capacitor I mentioned, and if it's passing DC then the UCL82 will be rather uncomfortable.. If C25 was short or very low resistance that may also cause the speaker grief.
I would replace them both.

12th Jan 2019, 8:31 am	#8
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,310	Re: Stella ST113U- distorted sound causes ? Are you sure it's a 330 ohm? If it is it may have been replaced in the past, or upped in an attempt to tame an already faulty UCL82 Check out the two capacitors in the mini diagram above too. C24 is the grid capacitor I mentioned, and if it's passing DC then the UCL82 will be rather uncomfortable.. If C25 was short or very low resistance that may also cause the speaker grief. I would replace them both. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly." Last edited by Tim; 12th Jan 2019 at 8:38 am.