SME TONEARM HISTORY FULL
The angle of the stylus tip determines how much of its surface area makes full contact with the groove wall. A discernible change in pitch is created by movement in the vinyl wall one thousandth of the thickness of a human hair, detected by the styus sitting in the groove. There should be nothing surprising about that, though it was, as the whole business of hi fi is about massive amplification of microscopically tiny signals. Very small adjustments create very large changes. Now just to drive that point home that 0.018 mm equates to a 0.00342 degree change in stylus rake: around three thousandths of one degree! So once you’ve found that sweet-spot a change of 0.018 mm (2×0.0091) will lose that perfect reproduction. He says that changes of +/-2 clicks produce a “vital” change in sound quality. That translates to less than one hundredth of a mm. The VPI’s VTA adjuster clicks equate to 0.35 thousandths of an inch according to Mr Gregory. A 1.0mm change in arm height changes SRA by 0.19 degrees. Just in case you were thinking LJC was off his medication with this sweet spot business, an audio engineer walks you through the principles and metrics here, extract below:Īssuming the (VPI) tonearm to have a 300mm effective length, to get a one degree change of Stylus Rake Angle we need to alter arm height by 5.23mm.
SME TONEARM HISTORY TRIAL
In this case, trial and error found less than a quarter turn of the adjuster identified the huge step change in soundstage and tonal balance as it springs into or out of focus. Starting with a spirit level and rough-tuning up and down to achieve a fairly level tonearm position, it is then necessary to fine tune the adjustment to locate the very small range in which the “sweet spot” is found. The stylus will ride perfectly in the groove when the arm is perfectly horizontal and parallel to the record surface. Altering the arm height is carried out by rotating the helical screw disc up or down – which alters the angle that the stylus makes relative to the surface of the disc, and thus how well that line-contact stylus matches the ridges cut by the original lathe onto the groove wall. It turns to raise or lower the tonearm, and holds a grub screw to tighten on the final position.Īchieving the correct angle by adjusting the height of the tonearm is critical to achieving accurate groove tracking. Most good quality tonearms will have some sort of equivalent method of adjustment. The adjustment wheel on an Origin Live Encounter tonearm. (Note: these pictures are not the latest LJC kit, which continues to evolve) The stereo sound stage snapped into focus, the troubling bass lifted, harshness was replaced by sweetness, an extraordinary and unexpected experience. In less than 15 minutes, the effect of adjusting, refining the adjustment, and eventually locating the “sweet spot” in VTA – just a turn of the adjuster, listen, turn a little more, listen, turn again until you finally locate it – completely transformed the performance of the system.
You have already paid for your equipment, and though the turntable may have been set up “perfectly” at some time by a dealer, experience shows this is no guarantee that it is correctly and precisely adjusted right now. Parts move with use, and the tightness of fittings can alter over time.
It is not as difficult as you may be thinking, and costs nothing. This little item has to be one of the most sought after replacement parts in the history of SME Tonearms !! SHIPPING RATE IS SET AT $5.00 FOR THE UNITED STATES & $7.50 FOR THE REST OF THE WORLD.Precise adjustment of the Vertical Tracking of your tonearm is one of the most significant improvements you can make to your listening experience.
These Finger Lifts are suitable for all SME 30 Tonearms. We Guarantee That ?WHO SHOULD BE YOUR SOURCE FOR SME PARTS? UP FOR AUCTION HERE IS AS FOLLOWS A Genuine (NOS) SME Finger Lift. They are NOT reproductions or some off shore garbage. All of the items we are offering here in various auctions are all Genuine SME New Old Stock. What we have here Ebay members are some of the rarest and without question some of the most sought after SME 3009/3012/Series III (NOS) Replacement Parts ever made. WHO WE ARE We are the Canadian Distributor for all current production SME Tonearms & Turntables We have been the reference source for all things SME in North America for over 15 years We have restored & rewired almost 4,000 vintage & current SME arms to date Our restorations & rewires of vintage & current SME arms are legendary Want to know more about us ? Just google SME Tonearms on any google search engine in the world we are the people that come up number one virtually each and every time. Item: 1318462869 3012 TONEARM HEAD SHELL FINGER LIFT NOS NEW BRITISH MADE SME PRODUCT.
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