DC motors and outboard power supplies...

No regrets, Are you absolutely certain that the belt is not slipping? If it's neither the belt nor binding up of the bearing assembly, then have you been able/are you able to measure the electrical output of the PS when it is running well as compared to when it is running too slow? That at least will pinpoin the problem to the PS. You might want to reveal the identity of your tt, so that others who own the same rig and might read this thread could relate their experiences. For example, measure the DC voltage at the output of the supply under both conditions (if you have a DC motor).

Dear No regrets: +++++ " Literally around the world in just over 8 hours time thanks to my Linn LP12, Naim ARO, Wood bodied Benz, and Pink Link DC Battery Power Supply. " +++++

well, I'm not the right person to help you on that Linn configuration but I think that you could obtain a very good advice/support from either LINN directly or the LP12 owner " excited " community, good luck.

Regards and enjoy the music.
Raul.

Hi Lewm,

Thank you for your response. My table is a Linn LP12 that was modified by Pink Triangle with a Pink Link DC Battery Power Supply. I take excellent care of the bearing assembly and really do not feel it is the cause of the problem. The inner platter and pulleys have been cleaned, the belt has been replaced with a brand new one so I don't think that is it either. What is confusing to me is that there are times when I can listen for up to eight hours strait with no problems. Other times it occurs within the first hour or two. I think that your suggestion about measuring the output of the supply is a great idea and should tell me if the problem is the supply or the motor. I will try to do that tomorrow. Thank you for that suggestion.

Hello Raul,

Believe me, I have done much research and have participated on many of the forums that Linn and Pink Triangle owners frequent. I have had many good suggestions but to no avail. I know I will most likely have to buy a new motor and power supply but I sure would love to try and fix what I have first because when it is running correctly, I do love the way it plays records.

Since Adjust+ is available, I heard from lot of users, that their - expensive - Turntables are drifting. That's more common than most of us think.

I am using
a, Basis Debut with Walker controller
b, Micro Seiki 5000

. How often do you check to see if the platter is at correct speed?

for both at the beginning but then I stopped that

. How often do you have to fine tune the speed adjustment?

a, never
b, never

. Once fine tuned, does it stay throughout the listening session, or do you need to make adjustments throughout?

a, stable
b, stable

. Would you be willing to comment on which table you are using?. How often do you check to see if the platter is at correct speed?

maybe 1x in 14 days

Dear No regrets: Normaly a speed TT has to be fix ( by design ) on 33/45rpm on the electronic circuit in the PS and normaly too this could be through a " pot " ( variable )that is the part that makes that job and for check about you need the diagram or a technician if you can't do it. I don't know how this works in your TT but you can contact to Linn and Pink Triangle and ask about.

Regards and enjoy the music.
Raul.