Home » Audio » Craftsmen » Preamp for Low Output Moving Coil Cartridges
Preamp for Low Output Moving Coil Cartridges [message #77272] Tue, 23 July 2013 21:43 Go to next message
gofar99 is currently offline  gofar99
Messages: 1895
Registered: May 2010
Location: Southern Arizona
Illuminati (5th Degree)
Hi Everyone, I didn't want everyone to think I only do tubes (about 95% true though) so I did an IC project. I wanted to see how quiet I could get a preamp for low output moving coil cartridges (LOMC). So with a bit of studying and a bit of bench tweaking I came up with one. Response is as flat as I can measure between 10HZ and 30K IAW the RIAA curve. S/N above 100HZ is -96 dbv. At 20 HZ (worst case) it is -89 dbv. Very very quiet. The gain is about 58-59 db and input impedance is 200 ohms. The gain and input impedance can be adjusted rather easily. The sound is quite nice and the preamp could easily be the only one someone might want.

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Good Listening
Bruce
Re: Preamp for Low Output Moving Coil Cartridges [message #77274 is a reply to message #77272] Tue, 23 July 2013 22:11 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18669
Registered: January 2001
Illuminati (33rd Degree)

That's a great op-amp, and looks like a wonderful project!

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