"N_Cook" wrote in message
...
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
http://home.graffiti.net/diverse:graffiti.net/






AC30's have always had weird tone circuits that don't do what you think they
should. There may not be any fault at all.



Gareth.