Creaking sound from stereo
Hi guys, haven't been on this forum in years. I have a late 60s/ early 70s Magnavox astrosonic stereo that has this sound out of the left speaker that is kind of like moving a creaky door really slow. Has worked fine for a long time, the sound just started. Any ideas?
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Are the electrolytics original? Some of those caps prevent oscillation or cause it when bad.
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Quote:
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I'd bet on lytics too - maybe a "motorboat" oscillation when a push-pull stage draws increased current due to increased bass volume?
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Ill see if I can make a video of it sometime, then it may be easier to help diagnose, it has some pretty dirty controls, I may give it a shot, but it probably is caps.
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https://www.youtube.com/watch?v=_XRP-GAcLwc
Here is the video, it went away overnight, and then came back after about an hour. Sounds like popcorn. Doesn't get louder with volume, but does become more rapid. |
Definitely bad capacitors Johnny you may want to change those a full recap is in order
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After some diagnostics, turned out to be a capacitor on a small board for the output. Problem solved thank you all for your help.
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Congratulations show me I'm fixing that I hope you enjoy your Magnavox I love that sound but Magnavox specially the tube type models solid state is okay but tubes are better going to stay in touch better
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