philo
2019-07-18 00:40:54 UTC
Got two radios repaired yesterday, now working on a Crosley 124 that I
worked on a few years ago. All it needed then was new filter caps.
Almost zero audio output.
Pair of 47's in the final audio
I have a speaker with audio transformer I can put across the output
stage to confirm it's not a speaker or audio transformer problem
voice coil is good and has voltage on it.
If I put my test speaker to the input stage of the 47's I get a moderate
audio signal so I know it's the last stage.
One of the 47's tests low emission on my tube tester but works ok in
another radio. Also tried different tubes.
A bit stumped for now as there really isn't that much more to test in
the output stage.
worked on a few years ago. All it needed then was new filter caps.
Almost zero audio output.
Pair of 47's in the final audio
I have a speaker with audio transformer I can put across the output
stage to confirm it's not a speaker or audio transformer problem
voice coil is good and has voltage on it.
If I put my test speaker to the input stage of the 47's I get a moderate
audio signal so I know it's the last stage.
One of the 47's tests low emission on my tube tester but works ok in
another radio. Also tried different tubes.
A bit stumped for now as there really isn't that much more to test in
the output stage.