Re: AM Radio problem volume
If you replaced the speaker(s) and got the same results, then the problem is internal to the radio.
It could be the power transistor(s) or it could be the driver circuit preceding the power circuit.
If you pull the cover off and see the power transistor(s) bolted & inserted into a socket, you will see they are mounted to an alum extrusion called a heat sink, you can remove them and go to an TV repair, are there any more? or electronics supply shop, and get a substitute part number and swap them, if a pair, and go from there.
If there are wires soldered to the two leads, use a 25 watt solder iron and resin solder and remove, after tagging or writing down the color to each lead, and replace the transistor(s). Your call. Or visit an electronics friend for him to do it or submit the radio to a repair shop with the speaker being used and have it professionally repaired.
But like I said, if there is a pair of power transistors, replace the pair, not just one.
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