Home Vinyl Asylum

Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ.

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Vinyl Asylum ]
[ Alert Moderator ]

RE: Is this a 4 pole Aussenlaufer?

Hi Ugly,

You can sort the speed with this inexpensive tach which I linked from Amazon.

I do believe that the motor made for Thorens by Papst was indeed an Aussenlaufer however it is not synchronous. It is an induction motor with a well defined slip versus torque characteristic. I believe Thorens controlled the speed with an eddy current magnetic brake.

If you get the tach you can check that by rubbing your finger on the rotor and seeing if it slows.

I don't think you can tell by looking at the rotor. I believe that rather than a laminated core and a shorted squirrel cage it uses solid steel and the Eddy current in the rotor to serve as the squirrel cage. A hysteresis motor uses a hardened steel rotor.

Phil




This post is made possible by the generous support of people like you and our sponsors:
  The Cable Cooker  

Follow Ups Full Thread
Follow Ups
FAQ

Post a Message!

 Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]