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I have a Sony "s" tonearm that is sensitive to different headshells. It produces no hum when used with the heavy Sony shell, but lighter headshells, even the Technics produce hum to various degrees. The thing is that I have an almost identical turntable with the same arm that is not sensitive to different headshells at all. So there must be something in the tonearm or table that's causing this. Any ideas?
Follow Ups:
I'd suspect that there's a grounding problem with interconnect cables. If the Sony in question is 70s vintage, then I'd highly recommend the interconnects be fully replaced. Many of these used foam insulation which may well have broken down.Before you go to this effort, though, examine the 4 pins inside the connector at the tonearm. Some of these used springs to provide tension for the connection. If one of those has gotten stuck, then all sorts of grief will result. Make sure, of course, that they're nice and clean, too.
I still stand by the interconnection recommendation no matter what if the 'table is over 20 years old.
Hope that helps.
Cheers,
David
David, it's a PS-X70. I also have an X60 and X65 and neither of them exhibit this behavior. Great tables, incidentally. Thanks for the good advice.
Yes, then I'd go for swapping out the interconnect cables. If it is like my old PS-X6, then there should be a small connection where the small wires from the tonearm are soldered to the interconnects that terminate in RCA connectors.I'd get some decent cables, cut off the RCAs on one end of the stereo pair, prepare the wires and install them where the old cables were connected.
If you've got an ohm meter, test the tonearm wiring while you're at it. They should be fine, though.
Glad you're a fan of these TT's, they're quite the sleepers, IMHO.
Cheers,
David
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