1965 Aiwa AR-145 12 Transistor Radio Issues

[zeno]

Run the radio a while & see if the audio driver or outputs are getting hot.
Often one will go leaky & cause symptoms like this.
Sams doesn't list this set so a manual will be a challenge.
The audio out area is pretty common design for most radios of this vintage.

73 Zeno
LFOD !