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

Jolly 7 · 11th Jan 2019, 11:31 pm

Currently I am trying to fix a Stella valve radio. I found out that the speaker is open. The radio works on both medium and long waves but produces distorted sound through a pair of high impedance headphones. Can anyone please suggest the most likely cause of the distorted sound. It uses four valves: UCH81, UBF89, UY85 and UCL82.
I am aware the speaker has an impedance of 300 ohms. Are there modern substitutes available ?

11th Jan 2019, 11:31 pm	#1
Jolly 7 Octode Join Date: Feb 2018 Location: Southampton, Hampshire, UK. Posts: 1,061	Stella ST113U- distorted sound causes ? Currently I am trying to fix a Stella valve radio. I found out that the speaker is open. The radio works on both medium and long waves but produces distorted sound through a pair of high impedance headphones. Can anyone please suggest the most likely cause of the distorted sound. It uses four valves: UCH81, UBF89, UY85 and UCL82. I am aware the speaker has an impedance of 300 ohms. Are there modern substitutes available ?