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Preamp for Low Output Moving Coil Cartridges [message #77272]

Tue, 23 July 2013 21:43

gofar99
Messages: 1947
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.

index.php?t=getfile&id=1218&private=0

Attachment: LOMC IC Phono Preamp July 22, 2013.png
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Attachment: IC Phono Preamp Inside.jpg
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Attachment: IC Phono Preamp Rear.jpg
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Good Listening
Bruce

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[Message index]

		Preamp for Low Output Moving Coil Cartridges By: gofar99 on Tue, 23 July 2013 21:43
		Re: Preamp for Low Output Moving Coil Cartridges By: Wayne Parham on Tue, 23 July 2013 22:11

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