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I have a classic car with an astor diamond-dot radio which crackles when the volume control is moved?



The radio powers-up OK, but the volume is very low, and the speaker crackles when the volume knob is turned. Any ideas about the problem and how to fix it would be appreciated

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5 Comments

  1. dodge man

    i own a repair shop,and it needs a new replacement speaker in it,this is what causes this to happen, i do a lot of replacements on some of the older cars ,and most of the time there easy to get to ,but that’s the cause of it,and you,ll be surprised how much better it will sound with a new speaker in it, the volume will come back up on it also,,good luck i hope this help,s.

    Posted on 12-Nov-09 at 3:16 pm | Permalink
  2. goldwing127959

    ok do this. Remove the know and get some contact spray. You can use WD-40 to do the same. The scraching you hear means the contacts inside the controll is dirty.
    Ok after you remove the know, you will see a small hole and give it 1 or 2 quick sprays. Reinstall the know and rotate back and forth from full off to full on. That should clean it up .

    Posted on 12-Nov-09 at 3:28 pm | Permalink
  3. mohavedesert

    If the radio actually plays, but the volume is low then it is very possible that the only problem is dirt in the volume control. Go to Radio Shack and get a spray can of their “TV tuner cleaner” which is around 9 bucks. Spray it into the open side of the control which is not the knob side, but on the circuit board where the three wires go into it. you will see an opening slot there in the cover that you can spray into. Spray a lot in there while moving the knob back and forth (power off of course) and then after doing this a few times let dry for about 5 minutes and then turn back on and try. There are capacitors, tubes, and all sorts of things that can cause the volume to be low as well, but the crackling when you turn the knob indicate that the resistance in the control is high. You can even buy a replacement volume control from Radio shack in a more modern model for a few bucks and change it yourself as only 3 or so wires to solder to it in the same pattern as the old one and one nut holds the assembly to the radio chassis. I would try these items first before sending it off for repair as that is very possibly all they are going to do and charge a bunch for it. :-)
    One other thing, the volume control is often called a “potentiometer” instead of volume control and that might be what Radio shack is stocking them as now.

    Posted on 12-Nov-09 at 3:56 pm | Permalink
  4. sparky3489

    The second and third answers are right. You need contact cleaner. Be darned sure it’s the kind that won’t hurt plastics.

    Don’t use WD40!!

    Posted on 12-Nov-09 at 4:05 pm | Permalink
  5. Fred C

    It is a dirty control. You need some contact cleaner spray. the radio has to come out, and the case opened. Spray the cleaner in any small opening in the volume control while you turn it back and forth. It will clean it, and it will work as good as new. Most classic radios with dial in the middle, and controls on either side of the dial are reasonably easy to remove. While you have it out, spray any other similar controls, like treble, bass, or balance. Might as well have them all clean, and never have to do it again.

    Posted on 12-Nov-09 at 4:58 pm | Permalink

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