AM Radio problem volume - Team Camaro Tech
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post #1 of 8 (permalink) Old Dec 17th, 11, 03:29 AM Thread Starter
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AM Radio problem volume

I have a stock 68 camaro AM radio, everything works but i have to turn up the volume all the way to barely hear something, Any ideas? Is this a transistor problem?
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post #2 of 8 (permalink) Old Dec 17th, 11, 05:01 AM
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Re: AM Radio problem volume

Maybe an exhaust system problem?


Seriously - speaker connections good and is the speaker in good shape?

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post #3 of 8 (permalink) Old Dec 17th, 11, 05:36 AM
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Re: AM Radio problem volume

Could be. Try another speaker. OE speakers are 10 ohm, aftermarket are 4 or 8 ohm, meaning afmkt will require less volume control for the same sound level.

Replace transistors as a pair.

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post #4 of 8 (permalink) Old Dec 17th, 11, 07:25 AM Thread Starter
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Re: AM Radio problem volume

It is a nos delco 10 ohm speaker, I also did try putting two 4 ohm speakers in to total 8 oms and same thing???
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post #5 of 8 (permalink) Old Dec 17th, 11, 07:26 AM
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Re: AM Radio problem volume

Good suggestions. One question, when you are adjusting the volume is there a scratchy-static noise? If so the volume control needs rebuilding/cleaning or replacement.


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post #6 of 8 (permalink) Old Dec 17th, 11, 08:37 AM
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Re: AM Radio problem volume

If you replaced the speaker(s) and got the same results, then the problem is internal to the radio.
It could be the power transistor(s) or it could be the driver circuit preceding the power circuit.
If you pull the cover off and see the power transistor(s) bolted & inserted into a socket, you will see they are mounted to an alum extrusion called a heat sink, you can remove them and go to an TV repair, are there any more? or electronics supply shop, and get a substitute part number and swap them, if a pair, and go from there.
If there are wires soldered to the two leads, use a 25 watt solder iron and resin solder and remove, after tagging or writing down the color to each lead, and replace the transistor(s). Your call. Or visit an electronics friend for him to do it or submit the radio to a repair shop with the speaker being used and have it professionally repaired.
But like I said, if there is a pair of power transistors, replace the pair, not just one.

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post #7 of 8 (permalink) Old Dec 17th, 11, 08:54 AM
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Re: AM Radio problem volume

These delco radios ain't that great on the am band.. the fm one is sure a lot better.

Wouldn't hurt to have a tech look it over, to see if there's any stuff to be looked at.

I had an electronic antenna enhancer put in my archaic system, and it seemed to pull in the signals a bit better. The closest radio station is about 60 miles as the crow flies, eh?

Guess you could go hog wild, and replace the orig guts with new, but that's prob cost you $400+ to do this...but, it would still look orig.

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post #8 of 8 (permalink) Old Dec 18th, 11, 04:12 AM Thread Starter
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Re: AM Radio problem volume

Thanks to all for the help!
I am going to try to look into changing the transistors. Could just buy one that works but what fun is that?
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