Hi Board,
Stuck in doors with lots of snow up here on the Pennines so decided to have a go at an unknown 4 valve 1930's Derwent.
It has a round aircraft type dial and says "Puts a Girdle round about the Earth" on the dial. Re-capped and rewired where necessary but now I've got a weird scenario and I just don't know why.
When I turn the set on I hear a music station then it slowly fades out to nothing, if I turn off then on again, It does the same again. The wave change makes a healthy pop when turned.
I'm very new to this hobby and have some old 40's/50's books which assume a certain level of knowledge. I have checked some voltages and the speakers pops and crackles when checking is done. All valves glow. Any ideas, no service sheet not much experience makes for a glum time.
Valves are 80S (rectifier), 42(errrr !!), 6A7 (top cap goes to tuning gang), 75 ( I think this is the output valve as its top cap goes to the output transformer) 78 (is this the AF valve? its top cap goes into a silver can)
All the best OldTickTock