I am experiancing an intermitant humm/buzz through my speakers when using my turntable. When I turn off the turntable, the buzz persits. When I move the pre amp selector switch off the phono MM position, the humm stops. Sometimes the Humm comes on loud and other times the volumn must be turned up and the humm increases with volumn. There is a phono MC Position, but the specifications state that the cartrige is a moving magnet type and I have always used the MM position and connection.The turntable is a JVC QL-A7. The preamp is a Mitsubishi DA-P20. The amp is A Mitsubishi DA-A15DC. All three are circa 1980. The turntable has been rarely used over the last couple of years and therefore the phono selection position hasn't either. I've recently gotten back into listening to my vinyl and would love to get to the bottom of this. Any advice/suggestions would be greatly appreciated. Thank you, Richard
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It's possible that there is a bad connection in the picup arm or the cart. and it's picking up stray AC humm. Reseat the cartridge or check for dirty connections, bad wire, or the cables that go to the input of the preamp. Sounds like AC pickup to me. I had an old DUAL turntable that the cartridge used to loosen up and cause that problem.
Hope this helps.
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can I rsvp to this...? Well anyway check your wire- main cord coming from the preamp/ ouput whichever applies try another see if that is the problem, and verify you are using the correct hole for the device................
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