[NostalgiaRadioTime]

I totally went through my single 47 version model 90 earlier this year. All new caps, all new resistors. It was playing fine. But it's been sitting a few months and now it developed a crackling sound that almost sounds like the crackling interference you get when there's a thunderstorm. It's controllable with the volume but is consistent throughout the dial as you tune. Does this sound like it could be caused by corrosion; that perhaps the trimmers on the tuner developed corrosion from sitting? Full disclosure I didn't remove the tuning capacitor from the chassis when I did the recap but did clean it out good. My other thought is it may be the grommets under the tuner that need replacing. Anyone else encounter this with a model 90? I didn't have this on my model 70 (which I sold after I got the 90).