Probably dirty tuning capacitor, as others mentioned. Put a couple of drops (don't soak with spray) of WD-40 on the brass springs that contact the rotating shaft and work dial back and forth. Spray a little WD in a bottle cap and apply with a toothpick or cotton swab. If the front bearing is ball bearings, toothpick a little white grease in there. If it continues, blow out the plates with computer keyboard air. If noise continues, sign in again.
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Reece
Perfection is hard to reach with a screwdriver.
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