01-22-2014, 12:07 AM
Before you do anything trace them to where they go.
Use any AA5 sch, like this one
http://www.nostalgiaair.org/PagesByModel...021381.pdf
See which ones go to 25Z5 cathodes and then from there either vial field coil or a choke to other one. Those are the one I mentioned, 20-40uF. The first one will be probably 40uF and the other - 20uF.
then trace the others. One could go to cathode of the audio output tube (the one driving the output transformer which could be on teh speaker or on teh chassis - depends). This one could be 5uF to 10uF with 50V to 100V voltage. And possibly another one filtering some divider there. Also same capacitance to 150V tops (this is a good margin). But those are no longer too critical. Any reasonable capacitance in uF range will work.
You should check your speaker first lest you fix the radio only to find out your speaker no workie-workie, and then you have no means of checking your radio.
Use any AA5 sch, like this one
http://www.nostalgiaair.org/PagesByModel...021381.pdf
See which ones go to 25Z5 cathodes and then from there either vial field coil or a choke to other one. Those are the one I mentioned, 20-40uF. The first one will be probably 40uF and the other - 20uF.
then trace the others. One could go to cathode of the audio output tube (the one driving the output transformer which could be on teh speaker or on teh chassis - depends). This one could be 5uF to 10uF with 50V to 100V voltage. And possibly another one filtering some divider there. Also same capacitance to 150V tops (this is a good margin). But those are no longer too critical. Any reasonable capacitance in uF range will work.
You should check your speaker first lest you fix the radio only to find out your speaker no workie-workie, and then you have no means of checking your radio.
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