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RE: Any reason I have not seen a fixed bias phono stage???

The issue probably has to do with the need to provide an extremely clean DC voltage. A manufacturer would be hard pressed to justify the cost of the additional PS compared to a simple cathode bypass cap. For DIY, it's possible to do, but then a coupling cap has to be inserted to protect the cartridge. You might consider the 5755 for the first stage. It's a zero bias triode, so it doesn't require either a bypass cap (the cathode is grounded) or a coupling cap. I haven't heard this tube yet, but it's the next thing I want to try for a phono pre.



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