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31.1.13.66
In Reply to: RE: which SME for OC9ML/II posted by flood2 on February 22, 2017 at 14:15:19
those are out of my budget at the moment....
if I reason correctly:
my cart has 9 x 10-6 cm/dyne at 100 Hz, resulting 15.75 x 10-6 cm/dyne at 10 Hz (multiplied times 1,75 according to several sources) and 8 g of weight
for:
3009 II (effective arm mass 12,5) I have result of 9,18 Hz
3009 II improved (6,5) - 10,97 Hz
3009 II improved S2 (9,5) - 9,96 Hz
3009 series III (5,0) - 11,39 Hz
Does it mean that option 3 - 3009 imp S2 is the best choice, wheas 3009 II is second choice? Does it matter which sign is the deviation from 10Hz?
Follow Ups:
The SME III is the best of the two. Get the black enameled carrying arm with modern Lofgren A geometry. I owned this tonearm for 20-years and I used moving coil cartridges exclusively. It is perfect for the OC9ML/II when using the 4.4-gram headshell weight along with all the counterweights installed. This configuration has 10 to 11-grams effective mass. I played the original AT-OC9 for three or four years in my SME III and the arm/cartridge resonance frequency was 10-Hz. If you can't afford one of the newer SME arms, the SME III is one of the very best and most versatile tonearms I ever owned.
Good luck,
John Elison
I had the II and the II Improved and neither behaved well with half a dozen different Moving Coils. The Knife bearings are said to be the problem.
I lived with a Series III for the time it took to leave SME once and for all, a thoroughly bad tonearm. OK perhaps with the extremely high compliance cartridges it was designed for when that was the fashion.
I lived happily ever after when I discovered the modestly priced Audio Technica AT-1005 which excelled with everything from DL-103r to Benz Ace L to ZYX R50 Bloom. Hard to find. Troll Ebay until you do.
I haven't checked the actual numbers, but your line of reasoning appears sound. I would choose any arm that gave around 10Hz as being optimal. However, anywhere in the range 10 to 12Hz could be considered ideal.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
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