Most Papst motors are build as three-phase as can be seen in the technical data sheets, a Bodine NYC-12 is a two-phase motor with two coils , Papst have three coils.
What turntables do you use? Pictures would be nice as well :-)
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I explained why they’re not 3 phase motors -at least the ones inside old turntables- but anyway I’ll be happy to learn if you share an original Papst motor’s data sheet that is actually used in TD124 or other old turntable.
The Pabst motor i am using is a 3 phase capstan built for a special version of the Studer A80, not 100% synchronous but can be controlled by changing voltage and frequency , i have modified the bearing assembly to make i more synchronous. It sounds better than the other motors i have tried, very dynamic and punchy in the low frequencies.
Pabst external rotor motor, direct replacement for Berger E 50 motor. I didn't think it sounded any better. Better to take the Berger apart, put in new ball, bearing bushes and new felt and then oil it with good sinter oil. Then the thing will run smoothly for the next 30 years. Put an adjustable transformer in front of it, set it to 215 volts and be happy.
Shematics pabst
Shematics pabst
As you know to find out what kind of motor it is you can use the motor itself as generator this is what I have done with the Thorens 902 5014 07 motor in the picture , 120 degr between the coils .
Also a statement from Papst itself that the motors have standard a three phase coils that can be used with a phasecap at a single phase supply.
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The Papst is a better motor then the E50 imho but you need to tune the phasecap with single phase drive for minimal vibration.
But as said earlier three-phase is the best solution , you never get a shaded pole motor quiet from itself , decoupling with springs gives is the best way to go.
Yes this motor has very good speed stability here is a test setup with a Studer capstanmotor driving a stack TD124 platters.
Three phase drive .
Three phase drive .
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I believe you immediately that a three-phase drive produces excellent sound. I have other adjustment screws that are more effective for me. A good plinth that absorbs noise (mine weighs 65lbs), set up the tonearms separately from the frame, no mechanical connection to the Thorens. The whole turntable on slate with air suspension. Next step: battery operation with sine wave inverter (from ambulance), excellent, clean sine wave 220 volts.
It is a two phase motor. Maybe it is 3 phase or even 4 phase but according to schematics it is driven by two phase.
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sounds like good recipi getting straight to emergency room......
He already has a heart starter built right into his TT power supply, no need for hospitals !sounds like good recipi getting straight to emergency room......
Have you modified it to run of a tube power supply yet Leif ? I know that is one of your diy specialties.I have mine in the chest.........
Yes good solution
No not a two phase
I understand that you cant read German language
Let me translate what Papst said about the motors in the documentation
,,, Papst aussenlaufer motors were mainly build with three phase coils ,,
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I can read German but I don’t understand cause I don’t speak German.
Thanks for translating it but Google has already helped me to translate it to English before you did. According to the document in German that you shared, the motor, even though it has 3 phase coils, it can be run on a single phase by adding a capacitor. Which means 2 phase. That’s why and by looking at schematics that @DasguteOhr shared I concluded that;
“Maybe it is 3 phase or even 4 phase but according to schematics it is driven by two phase.”
Ok, it is a 3 phase motor show me 3 AC lines feeding the motor in the picture (this is the picture you shared).
I can only see one phase AC line feeding the motor and second phase is generated by a capacitor. Exactly as explained by the German document you shared. As a result 2 phase driving the motor.
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Nice sense of humor love itsounds like good recipi getting straight to emergency room......
When you want to test for turntable or maybe tube phono/pre
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