DIY Turntable Power Supply

[Arch Stanton]

The TCA955 chip is still available from several vendors. Attached clip is its use as controller in a Thorens TT.

The circuit is for a DC motor with a tachymetric generator.
It seems to be a chopper.

 

[DieterK]

Right,
the TD115 is one of the less thorens player with dc-motor...

Regards
Dieter

 

[john_tracy]

Ist it possible, with the K&K supply, to regulate the phase shift between the two phases

Yes. It has two separate outputs with phase trim. This requires rewiring the motor with a new power cord and removing the cap from the motor pod.

 

[pelosi]

Somehow, this thread got terribly off topic. The OP was to see if there was interest in doing a group buy based on an already designed and CADed turntable power supply. The thread has turned into a design session on which topology is the best to use, from digital synthesizers to class A tube amp outputs. All of these have been discussed in other threads.

True, the current design is not very sophisticated or clever. It is not a commercial product, but an easy to build DIY design. Sure, it could be made better in a lot of ways, but unless someone wants to redesign it, it is what we are stuck with.

So back to the original purpose of this thread:

If enough people are interested in building this project, could someone with group buy experience work out the details to have the boards made?

 

[DieterK]

I think the most that had seen this threat would'nd work with the XR Chip cause it is not stable enough for a good turntable supply. My opinion is that it will be better to work out a good sinus/cosinus generator an then make a group by out of it.
Second i think that the XR chip based oszillater dont need a special PCB. It is so simple that you can build it on an universal board without problems. It needs a really very simple design that can be taken out of the datasheet.

Regards
Dieter