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:	post by xmikex at 2007-07-18 08:23:56

So when I inherited my parents record player I took the reciever that came along with it. It's from the 70's or early 80's and was probably top of the line in its time. The only problem with it is that the volume knob rarely cooperates.

When I try to listen to something I have to play with the volume knob to get it to give me a consistent sound. I don't mean I have to turn it up and down. I have to grab the thing and sort of jiggle it until it starts to play through the speakers. Sometimes it comes out on just the right side, sometimes just the left. Sometimes it'll take me 10 minutes just to get it to give me a steady sound, and even then I'm pretty much stuck with whatever volume I can get a sound out of, because if I turn the knob at all I'll have to start all over again.

The story my parents gave me is that my little brother used to mess with it when he was real little until it started acting like this, and they just gave up on it.

I took it apart yesterday to see if there was something obviously wrong with it, like a disconnected wire, or a cold joint.

The volume pot (in the top picture) is the larger of the two. I tried aggitating the wires while it was playing to see if I could isolate the problem. I didn't get any definitive conclusion out of it, but the red and white wires at the top of the picture were the only ones that effected it when I moved them. Also, if I grabbed the volume knob, and the back of the volume pot and put a little pressure on it with my hand it would sound perfect. Of course, a few seconds after I let go the sound would go bad again.

I don't know how many of you have experience with this type of stuff, but any theories or suggestions anyone would care to throw at me would be appreciated.

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