Vintage DD turntables. Are we living dangerously?
Technics claimed the SP-10MKIII would maintain speed with up to one thousand tonearms tracking at 2 grams each. Sure, look at this photo from the 1976 Japan Audio Fair during the presentation of the Technics SP 10 mk2 what it could do without speed variations; The MK3 is even an even more powerful engine. http://i949.photobucket.com/albums/ad331/marika-johnson/AA.jpg @Halcro ok ;) |
"Technics claimed the SP-10MKIII would maintain speed with up to one thousand tonearms tracking at 2 grams each." The manual for my SP-10 Mk2A quotes maintained speed "even with a load torque up to 5 kg-cm (4.3 lbs. in.)" That's only 500 tonearms tracking simultaneously at 2 g. each. So obviously a very inferior performer. ;^) |
Halcro re the 2 tonearm test. Actually I would be surprised if any of the flag ship DD TTs from that era failed this test. Feedback and sufficient motor torque is all that is needed. re the SP10 MK3, I don't run 2 arms, but I did a timeline test playing a record while forceably applying a carbon fiber record cleaning brush. The dot did not move 3.7 meters away. Not very scientific, I know, but it is possible to apply much more torque this way than with a second arm. It is also possible to significantly modulate this torque, which I did. No movement. cheers |
