Ditto to what Atma-sphere wrote. Chakster, the Krebs mod is to stabilize the stators. As you know, in a DD, the platter is generally the rotor of the motor or is affixed firmly to the rotor assembly. In the case of the Mk3, a gigantic ring-shaped magnet is fixed to the underside of the platter, so the platter IS the rotor. When the motor spins the platter, there is an equal and opposite (in direction) force applied to the stators. Any movement of the stator assembly in the direction opposite to that of the platter can at least hypothetically cause the servo system to "think" there is a speed anomaly that it needs to correct. This can result, at a micro-level of course, in the servo hunting for correct speed. Since the Mk3 has the highest torque motor ever used in a DD, to the best of my knowledge, this is a potential issue especially for the Mk3. What Richard Krebs devised is a method to further stabilize the stators so as to eliminate that phenomenon so much as is possible. My Mk3 was purchased NOS, and I listened to it for about a year prior to having it Krebs-ed by Bill Thalmann, his agent in the US. I hear a subtle improvement in terms of "smoothness" and therefore "musicality". (You can jump on me for using those vague descriptors, but they fit what I hear.) Before the mod, the Mk3 was already the most accurate TT that I own, but in some ways it was a bit clinical sounding compared to the Kenwood L07D which sits right next to it and feeds the same system. Now I can hardly tell the difference between them except for the fact that the Mk3 is still bang on accurate. I hope I am not putting words into JP Jones' mouth, but he compared speed accuracy between his tweaked Mk3 and his own new SP10R and found in terms of that parameter virtually no difference. Which is why I was able to resist buying a 10R in Tokyo, where you can buy one for under $7K.
Technics SL1000 MK3 (SP10 MK3) performance/value VS modern turntables?
I have a Technics SL1000 MK3 in beautiful condition and in it's lifetime has seen very little use.
I am ready to send it off for complete electronics restoration/upgrade, upgrade the speed control processor module and have the Krebs mods done. Will cost about $2500.00 to have all this done.
I was wondering how this would compare to what is out there for modern turntables after all the work is done?
Or, would I be better off selling it, and adding what I was going to spend for the upgrades to a new turntable?
I believe these should sell in untouched condition for at least $5K? So that would put me in the $7.5K range for a modern table?
For tonearms, I already have:
New, unmounted Moerch DP8
Fidelity Research FR64S, in beautiful condition that I sent off to Ikeda/Japan and they re-wired (better silver wiring, I still have original wires) and completely tore it down and rebuilt/re-lubed.... it's just like a new FR64S.
I think this table would be hard to beat at the $7500.00 price point, but would appreciate others opinion.
Rick
I am ready to send it off for complete electronics restoration/upgrade, upgrade the speed control processor module and have the Krebs mods done. Will cost about $2500.00 to have all this done.
I was wondering how this would compare to what is out there for modern turntables after all the work is done?
Or, would I be better off selling it, and adding what I was going to spend for the upgrades to a new turntable?
I believe these should sell in untouched condition for at least $5K? So that would put me in the $7.5K range for a modern table?
For tonearms, I already have:
New, unmounted Moerch DP8
Fidelity Research FR64S, in beautiful condition that I sent off to Ikeda/Japan and they re-wired (better silver wiring, I still have original wires) and completely tore it down and rebuilt/re-lubed.... it's just like a new FR64S.
I think this table would be hard to beat at the $7500.00 price point, but would appreciate others opinion.
Rick
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- 87 posts total
- 87 posts total