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Old 20th November 2007, 03:19 AM   #1
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Default Phono preamp mm

Hi,

I would like to make a phono preamp type mm for my turn table. Somebody have something to propose.

cartier20002000
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Old 20th November 2007, 04:35 AM   #2
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You could do a lot worse than the circuit National Semiconductor has in their app note for their new LME opamps.
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Old 20th November 2007, 11:54 AM   #3
AMV8 is offline AMV8  United Kingdom
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Conrad

Thanks for your comment. I just tried to find the application note but could not. Could you give me an op amp number to search against please.

Thanks

Don
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Old 20th November 2007, 12:07 PM   #4
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Hi,
this is it, I think (page2):

http://cache.national.com/ds/LM/LME49710.pdf
Rüdiger
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Old 20th November 2007, 12:12 PM   #5
AMV8 is offline AMV8  United Kingdom
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thanks

Don
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Old 20th November 2007, 02:25 PM   #6
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Search in this forum for the VSPS.

excellent phonostage
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Old 22nd November 2007, 07:42 AM   #7
Thomo is offline Thomo  United Kingdom
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Hi. Has anyone tried the PassLabs Xono or Pearl Phono stages?

Lee.
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Old 27th November 2007, 03:08 AM   #8
dangus is offline dangus  Canada
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Check out the Hagerman Technology Bugle preamp kit; those are available on eBay for reasonable prices. Reviews suggest that they perform very well.
http://www.hagtech.com/bugle.html
There's enough info there to build one from scratch if you wanted.

If you listen to house and techno music, you could build a classic DJ mixer phono stage: the schematic for the UREI 1620 can be found online. There's some images online of the 1622 phono card which clearly show the layout.
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Old 27th November 2007, 03:17 AM   #9
jcx is offline jcx  United States
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I strongly recommend against "passive eq" with flat op amp gain stages in RIAA preamps as shown in the national datasheet:

http://www.diyaudio.com/forums/showt...t=#post1014067
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