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In Reply to: RE: Stylus jumps at beginning of 12 inch record posted by Tompete123 on July 14, 2017 at 14:34:22
Here I go again given how many times that I have answered similar questions on various forums! Nearly all regular jumping at the same point on a record's radius is caused by the arm not disengaging properly from the lift/lower device when lowered. So it isn't disengaged for the outer part of a 12 " record but by the time it moves inwards to the outer radius of 10 " or 7" discs it is. Look at this.
Edits: 07/14/17Follow Ups:
An easy first thing to do, if the OP hasn't done it already, is to clean and examine the stylus- if it's bent or damaged or covered with gunk and a big ol' fuzzball, that could be the problem in itself.
He also mentioned the treble is greatly exaggerated- what's up here? It sounds like new stylus might be advisable. .
The most likely culprit however is the arm motion mechanism. These take several forms but in the OP's old Garrard, the mechanism is purely mechanical. There are bearings, cams, etc where you can see the brown dried-up grease. You can see the brown crud in the photo of the Garrard he specified, from the interwebbbs. There surely is ancient dried-up and gunky grease somewhere, interfering with the range of motion of the linkages.
My first effort would be to de-grease the mechanism and looking for bent, damaged, or rusty bits. I like CRC "QD Electronic Cleaner" spray for degreasing, it doesn't eat plastic or rubber and works decently if you use a few dozen Q-tips to rub the gunk off. Also some canned air to blow out the dead bugs, Q-tip fuzz, etc. Re-lube with a tiny sheen of the lightest silicon grease at faying surfaces and tiny, tiny dabs of Triflow from their groovy little pin-point lubricator on shafts and bearings.
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