10-01-2022, 06:31 PM
fixr,
all the caps are new. the electrolytics are 10 uf compared to 8 originally. close enough, i have to think.
with a permanent magnet speaker i did not get a pop. i also tried turning the radio off in the dark [with the field coil in the circuit] and didn't see any arcing but only hear the popping sound maybe half the time, if that, with no apparent rhyme or reason.
i jiggled the tubes and even tried another 42. i poked everything with a wooden stick and found one solder connection that wasn't good. correcting that didn't seem to make a difference.
i also tried putting cap 43 and resistor 44 in series between the 2 electrolytic caps. apparently they were not used in later runs. anyway, the radio popped all the same with them in the circuit.
for what it's worth, i hear a similar popping sound when i connect or disconnect an antenna.
the radio is certainly useable. i probably won't spend much more time on it unless someone knows definitely what's amiss.
thanks for all the suggestions.
all the caps are new. the electrolytics are 10 uf compared to 8 originally. close enough, i have to think.
with a permanent magnet speaker i did not get a pop. i also tried turning the radio off in the dark [with the field coil in the circuit] and didn't see any arcing but only hear the popping sound maybe half the time, if that, with no apparent rhyme or reason.
i jiggled the tubes and even tried another 42. i poked everything with a wooden stick and found one solder connection that wasn't good. correcting that didn't seem to make a difference.
i also tried putting cap 43 and resistor 44 in series between the 2 electrolytic caps. apparently they were not used in later runs. anyway, the radio popped all the same with them in the circuit.
for what it's worth, i hear a similar popping sound when i connect or disconnect an antenna.
the radio is certainly useable. i probably won't spend much more time on it unless someone knows definitely what's amiss.
thanks for all the suggestions.
