tonywinsc
Responses from tonywinsc
| Turntable speed accuracy Dover, good suggestion. I have a small, round bastard that should do the trick. I might give that a try. | |
| Turntable speed accuracy I found the owners manual online for Adjust+ and some reviews. As I surmised the low pass filter is set for 0.56Hz to eliminate record runout. I was considering drilling the center hole out a few tenths of a millimeter on my test record, but I beg... | |
| Turntable speed accuracy I downloaded the iPhone app and did some testing. The same test record that I used before also has a track with 3150Hz. As I mentioned before, I measured considerable runout in my test record which by itself causes some audible Wow when playing co... | |
| Turntable speed accuracy H Lewm, yes, you are correct. That is called cogging. I'm sure BD motors do it too if they are unloaded. You just can't see it with your eyes because they spin too fast. That is what I was saying before that designers use mass as a damper- mass da... | |
| Turntable speed accuracy The mass of the platter has nothing to do with speed control other than it is the "m" in the equation, F=ma or T=J(Omega). The motor controls the speed. Its that simple. As shown by the equation, more mass means the motor must generate more torque... | |
| Turntable speed accuracy I found an article online about the Nak. Very interesting tt. The author had an excerpt from an interview with the designer. He substantiates my point exactly. He says vinyl record runout is the elephant in the room that tt designers ignore. As fo... | |
| Turntable speed accuracy Keep in mind that the effect of the vinyl record runout is worse at the inner groove. As the needle is further out from the spindle the radius of the runout is proportionally smaller so Wow will be less at the outer groove of the record. So effect... | |
| Turntable speed accuracy It will show that the designer used a motor with sufficient torque to maintain a stable speed. | |
| Turntable speed accuracy Halcro, another way to do it is with a stopwatch if you are fast enough. The motor should be able to accelerate the platter from 0 to 33.33 rpm in less than 3.6 seconds. So you could start the laser then start the motor and stopwatch and time it u... | |
| Turntable speed accuracy Halcro, can you turn on the laser with the platter stopped and then start the platter? See if the speed is stable within one rotation. It is a bit difficult. The best way to see it would be with instrumentation and a plotter. | |
| Turntable speed accuracy I found an article online about the Nak. Very interesting tt. The author had an excerpt from an interview with the designer. He substantiates my point exactly. He says vinyl record runout is the elephant in the room that tt designers ignore. As fo... | |
| Turntable speed accuracy I have read this post with fascination and it has lead me to do some measurements and calculations. I am an engineer. This sort of thing is what I live for. I have an expensive belt drive tt and therefore I became very interested in determining if... | |
| Disappointing Evening Everyone cares about someone which means everyone cares about what at least one person thinks about them. Sure, you may not care about what the guy passing you on the sidewalk thinks, but I can't accept that a person cares about no one in this wor... | |
| Disappointing Evening People are social and it is normal to have concern about what other people think of us. Afterall, we cannot succeed materially or emotionally without the feedback/appraisal of those around us. To say we do not care what other people think of us is... | |
| Actually difference between class A and AB? The measurable difference between class A and AB is the crossover point. ie. In class A designs one tube/transistor amplifies the complete waveform. So bias current in transistor designs are at max levels all of the time. In a class B circuit, two... |