turntable motors...

[tvi]

Have a look at: www.thingap.com

The ThinGap® Advantage
-High Power Density
-High Efficiency
-No Hysteresis Torque
-No Cogging Torque
-No Radial Deflection
-Smooth Quiet Operation
-Low Inductance Coil
-No Magnetic Saturation
-Precise Back EMF Waveform
-Enhanced Heat Dissipation
-Manufacturing Precision

One of their patents is here.

It might be the motor used by Continuum Audio Labs


Regards
James

 

[Vinyl-Addict]

Hurst Manufacturing makes AC motors, the same exact motor that VPI uses. PB-3203-001 is a 600 RPM motor. That is the one VPI uses. Approx. $65
You can also check out Saia-Burgess motors. Roxan use this motor.

 

[Kees]

This is a real gooed motor http://rswww.com/cgi-bin/bv/initSes...&logText=uk9999x&logType=902&stockNo=441-0423

RS Stock no: 441-0423

 

[DragonMaster]

DaveM, after having thinking about it, a high RPM motor should provide a really stable speed.

The only thing I worry about is the fact that if something wrong happens, it's unstoppable.

As for vibrations, all depends of what you use for speed reduction and things like belt drive, etc. A flywheel should keep everything stable and smooth.

If you want to work with it, really just make sure that everything is able to resist to it.





As for old HDD motors, would you put something that noisy in your hi-fi?

 

[rif]

As for old HDD motors, would you put something that noisy in your hi-fi?

Noise as in sound or EM? I would think that both are minimal since the old HDs were based on older electronics and needed more stability/clean EM up frint. That's just a guess, of course, since I'm no HD expert.

I'll rip one apart somethome soon and see what I find.

 

[DragonMaster]

Noise as in sound or EM?

As in really loud.

At the same time, the older HDDs could put less data on a same platter size.

 

[Pjotr]

This is a real gooed motor http://rswww.com/cgi-bin/bv/initSes...&logText=uk9999x&logType=902&stockNo=441-0423

RS Stock no: 441-0423

Hi,

That’s a Premotec motor (formerly Philps) The data sheet can also be found here

http://www.vinylengine.com/manuals_turntable_motors.shtml

Also some links there to other suitable manufacturers. That Premotec motor runs very smooth but actually not smoother than the original synchronous motor of my Thorens TD160.

Cheers

 

[Mikewong]

Is it advisible to use capstan motor (openreel) to drive the turntable?
I have a Revox A77 capstan motor with control-circuit.

 

[dmcgown]

Is it advisible to use capstan motor (openreel) to drive the turntable?

Of Course! I am using a Pabst Tascam capstan motor with a DIY Armeggedon PS driving my Heretical Teres. Works great, stable speed, dark background.

David

 

[Mikewong]

Any details for your DIY Armeggedon PS with the motor?

 

[dmcgown]

Any details for your DIY Armeggedon PS with the motor?

I found that it lowered the noise floor, increased low level resolution, was more involving, and for the most part eliminated a bit of uneasyness to the sound. I had been using the motor with a variac to reduce the voltage down to around 85-90VAC to keep vibration down, and found that, although it had excellent speed stability (as an AC synchoneous motor), it did not have the same resolution and noise floor as the Teres DC motor. The DIY Armegeddon seems to be equal to Teres DC motor.

Now, the reason I am not using the Teres motor is due, simply, to the tweakiness of the low torque DC motor with its regulator speed sensor. I found that it was too easy for the motor to lose speed momentarily. After spending countless hours of adjusting belt tension and sensor height, cleaning/polishing/re-lubing bearings, etc., just to keep the motor consistently at speed, I felt that this got in the way of musical enjoyment, even though, when operating properly, it is sonically excellent. The higher torque AC motor was, at first, a comprimise of solid motor speed stability with a certain loss of sound quality (compared with the DC motor). Now is a different matter.

I intend to later subsitute a decent fixed voltage regulated DC supply for the Teres controller, just to see how this impacts the speed stability of the motor.

Now the DIY Armegeddon is a 700VA 45-0-45 toroidal transformer I picked up on eBay for $50. I am using a LC noise filter at the primary (A 60mH choke in each leg of the primary with a 0.47uF cap across the primary). The transformer secondaries are connected in a balanced configuration (with the centertap grounded).

David

 

[Mikewong]

schematic please if available.

 

[Paul Dimaline]

Click "DIY LP12 Power Supply"


Paul.

 

[valveitude]

I was cruising the net looking around surplus outlets, and I found this motor. Thought someone might be interested. It's a little overkill, but it looks like it could make a killer tt motor...

http://www.surplussales.com/Motors/Motors-3.html

Later,
Casey

 

[valveitude]

Srolling down to the bottom of the page linked above, there is sankyo dc motor with speed control board for $5.00...just sayin

 

[DragonMaster]

I'm starting to be interested. I've just got a cartridge for my TT and I can hear the motor from my Technics in the cart.

 

[nghiep]

My motor has feedback speed controlled at 33 RPM with high torque and low rumble of Technics SP series turntable. It can pull my VPI TNT Jr. platter from dead stop. I don't have to put alot of tension on the bell with 12 inch pulley. This put much smaller side load on the turntable spindle.