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Valve Phono Preamp [message #68202] Thu, 16 June 2011 17:26 Go to previous message
gofar99 is currently offline  gofar99
Messages: 1500
Registered: May 2010
Location: Southern Arizona
Illuminati (4th Degree)
Hi Fellow vinyl lovers. A work in progress is nearly ready to field. I have been designing a valve based phono preamp for addition to the Oddwatt Line. As is my personal policy it will also show up as a diy project. Not a simple project, but from what I saw at LSAF, it should be ok with many of the folks there. It is a MM design with the expectation that if you use MC cartridges you will most likely use a step up transformer. Some teasers, three stages, two are SRPP, passive equalization, tracking with the RIAA curve is within about a half db from 30HZ to past 20K, at 20 it is up about 0.75 db from the curve. I will be taking care of that before I post the project. Wide-band S/n is in the -90 dbv range. It has been running for about 3 weeks now in my main system and I like what I hear. Cool I still need a name for it so if you want a chance to have input and maybe a lasting contribution to audio send me your suggestions. Nod



Good Listening
Bruce
 
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