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

jayceebee · 24th Feb 2019, 12:32 pm

Sorry I don't have a manual but I would start by checking voltages on the BF196 & BF197 transistors, no or low collector volts would suggest a supply fault. Check particularly between the base and emitter for around 0.6 - 0.7V, replace any that are wide of the mark. If the BF196s are less than 0.5V then you may have an AGC fault.

John.

24th Feb 2019, 12:32 pm	#8
jayceebee Heptode Join Date: Jun 2007 Location: Durham, County Durham, UK. Posts: 640	Re: GEC Junior Fineline project. Sorry I don't have a manual but I would start by checking voltages on the BF196 & BF197 transistors, no or low collector volts would suggest a supply fault. Check particularly between the base and emitter for around 0.6 - 0.7V, replace any that are wide of the mark. If the BF196s are less than 0.5V then you may have an AGC fault. John.