quiddity
Responses from quiddity
| RS-3 owners: Seeking anti-skate help Hey Dave, I'm TRYING to understand the wonders of the RS labs approach to design, but so far I've had no joy as no-one has been able to explain how they work. Several explanations have been advanced but so far they've all been proven wrong.For me ... | |
| RS-3 owners: Seeking anti-skate help Juliejoma you have misunderstood skating force. It has nothing to do with the angle of the headshell except that this angle attempts to follow the offset of the pivot. The stylus reaction force is a vector. The direction of the vector is a tangent... | |
| RS-3 owners: Seeking anti-skate help It is not possible for the RS-3 to eliminate the skating force.The skating force exists because the arm has a fixed pivot and the frictional reaction force from the stylus in the groove does not pass through that pivot point. SInce the RS-3 change... | |
| Belt stretch Jean you are quite wrong. Referred to the platter the actual output torque of a Garrard motor is around 0.5 N.m. The Lenco is in the same ballpark (I don't have one to measure so I can't say exactly)Typical synchronous motors range from 0.5 to mor... | |
| Belt stretch Rccc you can believe whatever you like but you should do so in the face of the available evidence:1. Belt creep exists (see Mosin's post for one argument, there are several others)2. I can measure it.3. Doug Deacon can hear it.Ketchup, if the lath... | |
| Battery Powered Turntables? Any AC turntable can be run on batteries.Until recently* I made a kit which was specifically designed to run AC synchronous motors on SLA battery supply. It's very easy to do, use a car amp chip to step up the oscillator power then transformers (o... | |
| Measure My Turntable Speed Whilst strobes of various kinds are good for measuring average speed, the advantage of the test tone approach is that it allows one to monitor speed stability over the shorter term. The simplest method is to set up a frequency counter with the sho... | |
| Turntable speed measurements for speed accuracy? Doug : "Finally, the entire system must be able to overcome the variable load of stylus drag whilst playing real records, an extremely difficult engineering problem. "There is a name for this, it's called mechanical coupling. I think you are overs... | |
| Walker or VPI motor controller with scoutmaster? ElinorI am puzzled by your statement that the Walker "holds speed over a longer period of time". Does the actual output frequency of the VPI unit drift over time? I can see no other mechanism causing the effect you have observed The major determin... | |
| Building plinths for quality DD tables? A direct drive motor's counter-torque is directly coupled into the chassis. This is an inevitable consequence of it being a direct drive, so it can't be avoided (unless you can work out how to suspend Newton's Third Law of Motion). Since a DD serv... | |
| Has anyone added a second belt to their VPI Scout If it is the case that the pulley is tapered then my observation is moot, the speed differential would be due to the tapering. Etbaby originally reported that his pulley was not tapered.An interesting experiment would be to try the dual belts on a... | |
| Has anyone added a second belt to their VPI Scout Thanks for a very neat confirmation that belt creep in the VPI "Scout" is approximately 1%. When you duplicate the belt you halve the effective compliance so the belt creep also halves. | |
| Lotus cleaning system oxygenated water for LP's? OP made a slight misstep in describing the process. From what I can tell the Tersano is a water ozonator, it generates ozone (03) in water and uses it as a cleaner / sterilant.This should be very effective as long as the substrate (the vinyl) is o... | |
| Grand Prix Monaco review in new Stereophile- OUCH Grooves / Michael, I disagree that hall effect commutation has the effect you say it has, I think the problem is much simpler and was first "outed" by Sansui's engineers 20 years ago. It comes down to Newton's Third Law (you know the one, equal an... |