Not enough gain, you would need to follow this with another gain stage having 15 - 20dB of gain in order to have typical phono stage gain. The least I would consider would be 36dB and much more can be needed if you have a line stage with minimal or no gain.
In addition I think you would need to select fets for best performance and the power supplies would have to be extremely quiet.
I would look around a bit more. I suspect there are a lot of reasonably good discrete designs here if you search.
Tubes and op-amps are other good options. SY's design is particularly good and can be used with a conventional MM or HO MC if you don't use the specified input transformer.. It's output impedance is low enough that I suspect it would comfortably drive most solid state line stages. Take a look at SY's article: "His Masters Noise" http://www.diyaudio.com/forums/diya...oise-thoroughly-modern-tube-phono-preamp.html
In addition I think you would need to select fets for best performance and the power supplies would have to be extremely quiet.
I would look around a bit more. I suspect there are a lot of reasonably good discrete designs here if you search.
Tubes and op-amps are other good options. SY's design is particularly good and can be used with a conventional MM or HO MC if you don't use the specified input transformer.. It's output impedance is low enough that I suspect it would comfortably drive most solid state line stages. Take a look at SY's article: "His Masters Noise" http://www.diyaudio.com/forums/diya...oise-thoroughly-modern-tube-phono-preamp.html
Its easier to build one from an LM387. There is a circuit for a preamp using this IC in the N/S Audio Radio book. Also included are the components values for the NAB curve in case you wanted to make a tape preamp (which is what I built). The only drawback is that it uses a relatively high supply (+24) which might be unavailable if you are building it inside other equipment.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.