DC motors and outboard power supplies...

Dear No regrets: Looking at your thread and that in other one ( not yours ) you ask the same: Could I assume that you have speed " problems " with your TT?, do you? or which is the real subject: only curiosity?

Regards and enjoy the music.
Raul.

Hello Raul,

Yes, I am having issues with speed control in my rig. So, as I am trying to sort out these issues I am contemplating getting a new table but can't help but wonder if I might not have simalar problems with the new table. Therefore I ask questions of the fabulous members of this forum because I respect their opinions.

The problem that I am experiencing is that there are times that I can listen for hours without a problem, and then out of the blue my speed will slow way down. Other times I can't even make it through a single record.

I've changed the bearing oil, the belt, the battery in the power supply. I don't know if it is an issue with the motor or the supply. About a couple weeks ago, I cleaned the din plug that connects the power supply to the table and I had put on about 50 hours of listening without a problem. But now, here it is again. I'm getting stumped. Maybe I need to replace the capacitors and regulator chips in the supply. I don't know what the answer is but it is getting frustrating. I never know when it is going to happen except that it will probably happen for sure when I'd like to invite friends over for listening!

So do you have any ideas? Your thoughts would be greatly welcomed.

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.