View Single Post
Old 27th Feb 2020, 6:15 pm   #7
ajgriff
Octode
 
ajgriff's Avatar
 
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 1,273
Default Re: Grundig Concert Boy 1100 (again)

Towers gives AC188/K Hfe as 100 min so not sure that T013 is far enough out to be causing such a significant effect. Are the voltages shown on the schematic for the audio stage correct with the bias set to the specified figures? Also sounds like there's an issue with the mains power supply. You don't say whether or not AM is working ok at the DIN output?

Alan
ajgriff is online now   Reply With Quote