richardkrebs
Responses from richardkrebs
| Direct drive vs belt vs rim vs idler arm DoverI do not think that the published specs for the SP10 are wrong.....There is no measurable speed change due to stylus drag.I have alluded to another problem with speed stability in DD TTs that is unrelated to stylus drag or cogging. See my ear... | |
| Direct drive vs belt vs rim vs idler arm Ct0517The Krebs upgrade causes no material change to the platters inertia and I have not done any tests on the effect, if any, of extra mass via heavy matts or clamps. This was part of my line of questions to Halcro on any changes to the 101's pla... | |
| Direct drive vs belt vs rim vs idler arm HalcroThe reason for my question was that it is popular to add significant inertia via metal aftermarket mats. The thought is that this can screw with the servo, which if excessive, it should. I was curious, given the tight control, spot on freque... | |
| Direct drive vs belt vs rim vs idler arm HalcroThanks again for doing these tests they are most interesting. I did reply almost as soon as you posted. But it seems that I have suffered from moderator silencing I did note the dampening influence of the second tonearm on the DD but it is i... | |
| Direct drive vs belt vs rim vs idler arm Dover.To answer your questions.The servo does not know if you are going to play Mahler or Beethoven before the fact, but it does know very quickly when you do. The feedback is very fast. In much the same way that we do not know where a tennis play... | |
| Direct drive vs belt vs rim vs idler arm Dover. I tried to get out of this thread by offering an olive branch since I sense that we are going nowhere.... oh well.The argument that servos cause overshoot followed by a period of slowing and then repeat does not hold up to analysis. This pi... | |
| Direct drive vs belt vs rim vs idler arm Gentlepeople The problem with posts like this, where a difference in opinion is being aired, is that there is a tendnacy for us to talk past eachother and place significance on things that are written outside of what the author meant. This is perf... | |
| Direct drive vs belt vs rim vs idler arm 1) The Final has been shown, through your own testing, to slow down due to stylus drag.....end of story2) You are quite right, the Final has much higher intrinsic resistance to stylus drag than the other TT's mentioned...if you assume that the oth... | |
| Direct drive vs belt vs rim vs idler arm DoverNo inconsistency at all. I have repeatedly said that there are many paths...,Obviously within each family of drive there is bad and good engineering design. Further I have tried to be as generic as possible in my posts. I mentioned the Goldmu... | |
| Direct drive vs belt vs rim vs idler arm GentlepeopleA simple dynamic load test you might want to try if you havent already done so, is to hold your finger against the rotating platter while playing music. No strobes, timelines needed just your ears. Can you hear a speed change?How much ... | |
| Direct drive vs belt vs rim vs idler arm Ct0517You are quite right, I should have said "Motor/Controller"Many thanks | |
| Who needs a MM cartridge type when we have MC? Timeltel.Great to read that you are embarking on a plinth/pod journey.This is great fun and really frustrating all the same time.You don't specifically state what material you are using? It is some time since I put together my plinth and I am inte... | |
| Direct drive vs belt vs rim vs idler arm Gentlepeople. Isn't this an interesting thread.Ct 0517, that was a great video. Thank you for sharing it with us. Good to see what a well engineered closed loop speed control can achieve. It was also interesting how fast the high inertia platter s... | |
| Direct drive vs belt vs rim vs idler arm DoverYes we are measuring an error and correcting it before it gets worse. This is the old argument about feedback correcting an error that has already passed. The nature of this feedback and the torque/ platter moment are critical here. The motor... | |
| Direct drive vs belt vs rim vs idler arm Jazdoc I agree totally with you. There are many other important parameters that must be addressed in a TT designTo state the obvious. A complete TT assembly including arm and cart is a machine that measures tiny movement with respect to time. Over... |