Tube Phono Amps

[Primalsea]

I've been thinking about buliding a tube phono amp for a while but only started to look into it seriously a few days ago. Most of my projects have been solid state, the only tube project is my hybrid preamp that has a 6dj8 Buffer in it. A tube phono amp seems like a good 2nd project.

I've looked around on the web but have been unconvinced by many of the projects I've found so decided to design my own. What I have at the moment as a soild state design that I hope to carry over to a tube design.

what I have so far is a discrete opamp that actively equalises the first part of the RIAA curve (20 - 1Khz). However the feedback loop is first attenuated before the equalisation can take place. You will see on the posted circuit the resistive attenuator in the feedback loop which is then follwed by a Complimentry Feedback Pair (CFP) follower. The CFP follower isolates the resistive attenuator from the RIAA equalisation network that follows it.
This gives a first stage that actively handles the first part of the RIAA equalisation as well as having all of the gain of the phono amp. (the current resistor values set the gain is too low at the moment, it needs to be changed).

The 2nd part of the RIAA equalisation is passive and follwed by a buffer only. The idea here is that this will lower the noise floor for frequencies over this part of the RIAA curve.

I have read that phono stages are a popular topic here with some people and that there has been some shoot outs in the past. I'm hoping that someone will point me in the right direction on turning this SS design into a tube design.

A good start would be for someone to let me know what tubes would have enough gain for this??