Normal or abnormal ? Came in for an intermittant problem, fixed, and the following the owner lives with but is it normal or abnormal? With feed into a "normal" input and the "brilliant volume" at zero then there is no control of the bass on the tone control, you need to have a little advance on the brilliant volume. Trouble around V7 ECC83 ? DC voltages cathode,grid,anode "brilliant half" 0,1.4V, 182V "tone half" 182,183,290V all associated pots ,Rs and Cs check out agreeing with schematic as does the valve and same Vs with a different valve
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on