phoenixengr
Responses from phoenixengr
| Confessions from a VPI owner of some 30 years The ADS centre indentation represents 60hz, with your particular pulley, belt and platter combination, your table’s motor needs a frequency less than 60hz to achieve 33.333 rpm.I think this is well stated: Center detente REPRESENTS 60Hz; it do... | |
| Confessions from a VPI owner of some 30 years If I'm correct in that VPI has or will be discontinuing the SDS, it seemed that accepting the ADS was a better option at the time. Again, no one offered an explanation. I'm not surprised they weren't able to fix the SDS, I don't know who they ... | |
| Confessions from a VPI owner of some 30 years There really is no reason to replace your SDS with the ADS. In my informed opinion, the ADS is clearly inferior to the SDS in almost every measurable way. Aside from the difference in technology, if you look at VPI's forum, there are a number of ... | |
| VPI Avenger Why the vertical play in the motor stems?Why the addition of the small brass collars to the motor stems? The Hurst motors have a single friction bearing at the top of the motor housing; the magnetic rotor hangs below it and is unsupported at th... | |
| Upgrade Opinions, Thorens vs VPI If your Classic has the built in controller ("mini SDS" powered by an external wall wart), it will not be compatible with the SDS, ADS or any other outboard controller. No matter what the ADS does to the 115V AC signal that it outputs, the table’s... | |
| VPI SDS/ADS PSU with Rega Turntable? If speed stability and accuracy is your main concern, I think you will have better luck with the older SDS. Apparently, the ADS does not have the same stability as the SDS and adjustability can be an issue near the center detent position. There ... | |
| VPI TNT Turntables Actually, I have a problem with Hurst motors, but thanks for your unbiased opinion.BTW, the motor in your TNT table is not a VPI motor; it is sold by Hurst and manufactured in China. | |
| VPI TNT Turntables I bought the motor overseas; it has a 4mm shaft (the Hurst motor is 3/16") so I had to have pulleys made as well. The PSU is also a prototype and very different design than the Falcon or Eagle, although operation is the same and it works with th... | |
| VPI TNT Turntables The Hurst AC motors will always be a major limiting factor on the VPI tables. I own a number of the Hurst motors from the 49mm series up to the 60mm T series and the one consistency is they all vibrate, some much worse than others (within the sam... | |
| VPI TNT Turntables sbank-Understood. My initial comments had nothing to do with speed controllers, I was curious about why a putatively undersized flywheel seems to make such a difference in SQ. Somehow, the thread got pulled in the direction of arguing over the p... | |
| VPI TNT Turntables Constant motor speed does not equate to constant platter speed however.Would you rather have constant motor speed with constantly changing platter speed, or motor speed that changes to keep the platter speed constant? | |
| VPI TNT Turntables I agree that flywheels are a benefit, provided they are constructed properly for the task at hand. Usually, the flywheel is larger in both diameter and mass than the object it is trying to stabilize. Increasing mass does help, increasing r... | |
| VPI TNT Turntables Well, from the formula, there are only 2 parameters that effect inertia, mass and diameter. Diameter will have a greater impact because inertia increases with the square of the radius. If your flywheel is 5" instead of 3", it changes the additio... | |
| VPI TNT Turntables I'm not questioning whether it makes a difference, everyone would seem to agree that it does. I'm interested in finding out WHY it makes a difference.The reason posited by most is the increased inertia that a flywheel provides improves stability,... | |
| VPI TNT Turntables "Melm- Quite similar to the improvement gained by using a speed controller. More of the same. "That's interesting. A 12 lb 3" flywheel has less than 4% of the inertia of a 20 lb 12" platter; it's difficult to see how that would have much of a... |