Adding a PSU to a turntable

cpvh · 2019-04-16T06:32:13+00:00

Hi All, As some of you are aware, I have an old Sony Midi system complete with turntables. In recent years, the only thing I?ve used the main boxy bit for, is to provide 12V to drive the turntable. I?d like to feed it from something a bit more compact. But as usual, have zero budget. I?ve taken the bottom of the turntable and discovered It has a 9 point Something volt motor (it also has an auto Arm liftty and Putty away mechanism). I checked the power out from the big box, and it?s a little over 12V. I had a dig in my PSU box and the nearest I?ve got claims to be 13.1 V. Does the team think that?s near enough? Or do I need to get I?d down? If so, could I get away with adding a diode (and resistor (value?)?) in series?If not, could I add a 12V regulator? Or would I need more than 13V to feed the regulator?TIAChris

Apr 16, 2019 Last reply: 7 years ago 21 Replies

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cpvh 7 years ago

Back together with the 12V PSU now.

Having had another gander at the motor (a fine product of the matsushita corp. it is marked 9,12V.

By which I now think they must mean ?Anything between 9 and 12 V or thereabouts is fine round here.

Alls well that ends well!

Now to install it back in my bar, where it will probably gather dust unloved and unused for the next 20 years (It previously came in very handy digitising a few LOs which were made of Unibtainium-Digitallis.

Although, as it happens I?ve found a couple of them online since.

Chris

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Rob Morley 7 years ago

For only very slightly more than zero budget you can get variable PSUs and regulators like

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on eBay.

Obviously first check the drain of the existing supply, and having obtained an appropriate regulator check its performance under load.

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