RIAA preamps

[audioguru]

Maybe the induction motor in an old grammophone was used as an inductor in the power supply for the amplifier.

 

[camerart]

Sorry for butting in, as I haven't been following your theme.

I had a Gramophone with a Motor that was like the disk type Electricity meters, and the needle was a screw in type like the old windups, then was electrically amplified. It's gone to a Museum.

 

[audioguru]

I have a turntable that I haven't used for about 25 years. Its Shure magnetic cartridge is about 47 years old. The sylus has an ellipical diamond and it tracks at only 1.25 grams.

 

[KeepItSimpleStupid]

Hey, it's 33 1/3 RPM. Now add Moving Coil Cartridges to the mix or ceramic and moving magnet.

RIAA equalization - Wikipedia, the free encyclopedia

and for the purists: **broken link removed** And don't forget the stylus has to change for the 78's too.

Now, my friend has some wax recordings and a Victrola.