Bottlehead Forum

I See You Got Your First Question Answered

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In Reply to: RE: diy turntable AND (for all you experts) an obviously dumb question posted by nickb on May 12, 2008 at 21:18:09

The Seduction is necessary between a magnetic cartridge and the S.E.X. amp.

The implied question is why an AC signal...

DC motor speed is controlled by varying the magnitude of the DC coming in to it. 6V vs 12V will almost double the speed, there are some losses.

An AC motor speed is controlled by the frequency of the alternating current that is fed to it. It also has losses, so a 60Hz motor will need above 60Hz to turn "synchronous" speed. The speed on the nameplate.

Hope that helps a little bit.

"Remember, YOU are the only one who needs to be happy with the sound of YOUR SYSTEM."
Grainger Morrison
There Is Only One (Grainger Morrison, it seems)

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