yep definitely an AC component. not that I checked it with a scope or anything.
some history this was the first pocket transistor AM receiver that I had worked on. having nearly zero volume first off I replaced electrolytics with what I had improving volume considerably. sounded pretty good. the 50uF axial lead battery bypass that I crammed in there had never been used before. must have been far from new or at least poor quality. recently buying 47uF radial from Mouser I suspected my original replacement. wow what a difference. no more gargle grunge audio. cleaned it right-up. distortion gone. I changed another that should have been 10uF but had a 33uF in there from volume wiper to audio driver. although it is now 10uF like it should be I didnt notice any big difference maybe because I changed it before the 50uF. but is working great now. thanks to all and to all who like a good story