The TD125/SME3009 combination has provided years of excellent service but the one major fault has been the difficult and imprecise adjustment of VTA. This will produce the correct linear offset – ie 93.45mm.Ron Barbee, Thorens TD125, SME 3009: As the recent recipient of a version of your product which affords vertical tracking angle adjustment for my recently restored 1967 Thorens TD125 turntable with an SME 3009 tone arm, I want to encourage you to continue manufacturing this fine innovation and to recommend the incorporation of the VTAF capability to anyone with similar equipment. For these tonearms, a two point protractor was provided, however the alignment procedure did not change the extra grid on the protractor was only introduced to enable double checking of correct alignment.įor alignment of an earlier 3009 tonearm, using a conventional protractor with null radii at 66.00mm and 120.9mm - such as that produced by SME for later tonearms - the cartridge should be skewed inwards by just over 1 degrees in the headshell. When one these tonearms is aligned according to the instructions, the null-radii fall at 66.0 and 120.9 – ie the alignment is consistent with the method which minimizes peak tracking distortion. Later models of the 3009 tonearm were re-designed for an alternative alignment system. As discussed here before, it is possible to ensure alignment of a cartridge at two chosen null-radii by simultaneously ensuring that the cartridge is squared up in the headshell, and by adjusting the overhang so that the cartridge is aligned on one grid on a protractor. For these early tonearms, the linear offset will be 88.87mm when a cartridge is squared up in the headshell.Ī single point protractor was provided for alignment of these tonearms the centre of the grid on this protractor was located at a distance of 60.325mm from the turntable spindle. In other words, the designers intended for the cartridge to be set in the headshell so that null radii occur at 60.325mm and 117.42mm. The earlier 3009 series tonearms: - 3009 series I, 3009 series II, and 3009 improved / S2 improved which have a serial number that is less than 439606, have an arm tube that is designed for cartridge alignment according to the method laid down by Stevenson. Alignment of early models of the SME 3009 tonearm
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