phoenixengr
Responses from phoenixengr
| TT speed The OP is correct and his numbers are spot on target. The math to prove it is not difficult. If the position of the cartridge changes by 20° from beginning to end of the LP, it will lengthen the time of the play back by 100mS: 20°/360°=1/18th of ... | |
| Possibly Dumb Question re:Battery as a power supply The LM317 has a drop out voltage of ~3V, so I doubt it regulates the battery output to the table. NiMH batteries need to be charged at 1C and negative delta V slope detection, thus the higher voltage input, the PIC processor and complex charging c... | |
| Possibly Dumb Question re:Battery as a power supply @terry9- ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to 125°C (Note 17), unless otherwise noted) That is the standard disclaimer at the top of the chart of parameters. It is the operating point used in all of the measurements be... | |
| Possibly Dumb Question re:Battery as a power supply millercarbon: Never misunderestimate the ability of the forum to overthink even the simplest things. Full disclosure: I converted AC to DC battery, did none of that, and it was audibly quite a bit better. Just not that hard. Unless you make it so.... | |
| Calling all Sota fans. I have no idea why. It is a 3 phase AC synchronous motor. Synchronous motors are best for turntables because they will automatically adjust torque to maintain the speed dictated by the AC signal they are given. It happens instantaneously. I sus... | |
| Phoenix Eagle Versions? The original Eagle used a class AB output amp and was rated for 15W max. The wall adapter was 48VDC and 60W. Starting at SN 620240 the output amp was changed to a class D type and the output was rated for 25W. The wall adapter was 24VDC and 60W... | |
| I finally get it! A 1mm error in effective length implies a 0.1mm difference in overhang and a 0.1 deg difference in cartridge alignment. This should not be a drama. Read the articles. @olddearsWhere are you coming up with your numbers? A 1 mm difference in effecti... | |
| I finally get it! slaw-VPI has their metal work done by MDI, a very competent machine shop in NJ, so I don't think it is machining tolerances. VPI assembles the parts, made by other companies for them, so it may be an assembly error.From what I can tell, part of t... | |
| Turntable power supply/motor’s role in SQ for belt drive TT You may want to look at the motor/controller offered by SOTA:https://sotaturntables.com/product-category/eclipse-series/ | |
| Recapped Valhalla or new Herculis II? https://www.diyaudio.com/forums/group-buys/349742-turntable-tachometer-motor-speed-controller.html#post6086530 | |
| speed controller for Lenco or Garrard Yes, Condor is the name of the 3 phase PSU. | |
| speed controller for Lenco or Garrard The Eagle and the Condor are completely different and not interchangeable. The Eagle is a universal PSU that will drive any 115/230VAC motor up to 25W. The Condor is a low voltage PSU for a very specific 3 phase BLDC motor; it does not work wit... | |
| Linn LP12 factory power supply upgrade or 3rd party? Need to do 45’s. You can build your own PSU for ~£100 which will include closed loop feedback and a tachometer:https://www.diyaudio.com/forums/group-buys/349742-turntable-tachometer-motor-speed-controller.html#post6086530 | |
| Help!! Bought Rega TT in the UK and now cant use it in the U.S. If it's a new Planar 2, it uses a 24VAC motor; it would come with a 220V to 24VAC wall wart. You will need to replace the wall wart with a 120V to 24VAC version and get the correct pulley for 60Hz operation. The pulley will have to come from Re... | |
| VPI's new "Vanquish" Ultra High-End turntable is a STUNNER! @wspohn- That's an interesting point. You can compare the incremental improvement in SQ of this set up, but compared to what? I seriously doubt anyone with a $8K analog front end and $20K total system cost would install this TT into their system... |