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Old 19th April 2009, 07:24 AM   #1
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Default thorens TD125 arm board made

Friends,I want to build a new arm board for my thorens TD125,using rega rb300 tonearm.What's the dimension for all the holes I need to make?Great thanks for answering.
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Old 20th April 2009, 03:48 AM   #2
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I don't have a TD125, so cant help you with the board dimensions, but here are the specs for the RB300, which should provide all the info you need.

Good Luck

RB300 - Technical Specification

Low effective mass 11 grams
Effective length : 240 mm
Overhang : 17.2 mm
Offset angle: 23 degrees
Mounting distance: platter centre to arm hole centre : 223 mm
Diameter of mounting hole : 24 - 25mm
Size of base mounting nut is 32mm A/F (across flats)
Maximum armboard thickness: 27mm
The arm overhang to the rear - 50mm to the end of the counterweight stub
Total Weight 436 grams

The tip of the stylus should be 240mm from the pivot. In approximate terms, the armboard mounting hole should be such that the cartridge stylus will "overhang" the record centre (spindle) by a distance of around 17mm for an arm that is of 240mm Effective Length (distance from stylus to armboard mounting hole centre). Roughly check this by swinging the stylus over the record spindle.
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Old 21st April 2009, 02:23 AM   #3
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Default Great Thanks

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