Developed Hum.
Something changed, seemingly on it’s own.
Always check your cartridge wires, remove, if off too easy, tighten them carefully and reattach.
btw, after 70 years of not knowing this: I read on Ortofon’s site: the connector wires in headshells: the pins of cartridges and pins of headshell are slightly different diameters. reverse the wires if all seem a bit too easy to get on at one end, other end hard to get on.
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From Shure
MAR 7, 2020•KNOWLEDGE
Question
What is the diameter of the four terminal pins on the rear of a Shure cartridge (standard mount, not P-mount)?
Answer
The pin diameter is 1.32 mm, with a tolerance of +/- .05 mm.
The mating socket (soldered onto the headshell wire) has an inner diameter of 1.2 mm.
shure 'find an answer'.
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What else ON THE TT can you check yourself?
My TT, one tonearm, the delicate silk covered litz wire moved very slightly as the tonearm pivoted, rubbed against the square edge of the hole it passed thru. Bad design, they have changed it. Took over a year, but eventually the insulation of one of the wires caused a slight hum. Found it, VAS re-wired it, "humless days are hear again".