02-02-2013, 06:06 PM
have now fitted a new 3 core mains lead .i also found some of the rubber covered wire to the output tx needed to be replaced.
on re aplying mains the lamp limiter li up very brightly and there was a smell of hot wax.
this turned out to be the ez 80 going short.
after this diversion i have the audio stage working but no sign of any signals on AM or VHF. there is a click when changeing the wave change switch.with the signal injector i had a loud out put at the volume control ,and a low output at t13 then my injector died .
time to try something else ,i hooked the scope up to C31 (the ocs coupling cap) and found the ocsolator worked bu oml on long wave.
i pluged a wire into the aerial socket and was rewarded with a low leavel radio 4 and a french station .
so it looks like at least 3 faults to cure
1.why osc only works on LW
2. why the low gain.
3why no vhf?
rob t
on re aplying mains the lamp limiter li up very brightly and there was a smell of hot wax.
this turned out to be the ez 80 going short.
after this diversion i have the audio stage working but no sign of any signals on AM or VHF. there is a click when changeing the wave change switch.with the signal injector i had a loud out put at the volume control ,and a low output at t13 then my injector died .
time to try something else ,i hooked the scope up to C31 (the ocs coupling cap) and found the ocsolator worked bu oml on long wave.
i pluged a wire into the aerial socket and was rewarded with a low leavel radio 4 and a french station .
so it looks like at least 3 faults to cure
1.why osc only works on LW
2. why the low gain.
3why no vhf?
rob t
if its made by hand it can be repaired by hand
