David,
mainly five points:
- Noisy Bearing
- little vibrating pulley
- no fine speed control
- speed changes over listening hours due to warm up of the motor / Motor electronics (after 30 to 60 min speed need to be fine tuned again)
- performance change over the time (warm motor sounds better, so full performance after 30 min)
Many modern motors (unfortunately not all) are doing this aspects better, some of them do even sound significant better.
Juergen
I see why there's nothing to salvage Juergen, it's dead !
david