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-   -   Phono preamp mm (http://www.diyaudio.com/forums/analogue-source/112223-phono-preamp-mm.html)

cartier20002000 20th November 2007 03:19 AM

Phono preamp mm
 
Hi,

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

cartier20002000:att'n:

Conrad Hoffman 20th November 2007 04:35 AM

You could do a lot worse than the circuit National Semiconductor has in their app note for their new LME opamps.

AMV8 20th November 2007 11:54 AM

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

Onvinyl 20th November 2007 12:07 PM

Hi,
this is it, I think (page2):

http://cache.national.com/ds/LM/LME49710.pdf
Rüdiger

AMV8 20th November 2007 12:12 PM

thanks

Don

woodturner-fran 20th November 2007 02:25 PM

Search in this forum for the VSPS.

excellent phonostage

Thomo 22nd November 2007 07:42 AM

Hi. Has anyone tried the PassLabs Xono or Pearl Phono stages?

Lee.

dangus 27th November 2007 03:08 AM

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.

jcx 27th November 2007 03:17 AM

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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