Hello I have this issue with a cec ol 7540 boombox and this can also be for other radios that have this issue. If anyone has an idea please let me know.ok the issue....on tape selector if tape 1 is slected is has this air sound on right side of the speaker and is ok on left.now I had it apart cleaned everything thats supposed to be cleaned as I do for fixing all my radios but sometimes run into issues. Now plays fine on radio and tape 2 and am but when selecting tape 1 air or wind sound as I call it some radios I have do that sound sometimes when push fast f button.I was thinking prob capacitor but checked pretty much the importance ones and seem fine all switches and record bar been spayed. I fixed few solder points figured that might help but no preval.also thought might be a ground issue but not sure i figure it prob do on all thats slected bit could be ground just in that section of switch for just the tape 1 ? any one had issues like this with there certain radio and figured it out I love to know so that be one more that knowing what issue it is when I come across one again thanks .