Sounds sweet and has enough power to drive RV239.
There is a schematic of this stage in Tomofines site, but he only has written the mA and after trying to come to this currents i saw and heard that there must be something wrong.
so i had to search of data sheets and how to load the tubes.
Trial and error is also here mostly the way. I plugded on the driver to the outputstage and listen, and with 8mA on RL12T15 was only bass to
hear and with 11mA also, so finally i made it to 20mA and the sound was good but still a had the feeling of to much depths and not enough brightness in upper frequencies, so i looked on the REN904 which i had runnig with 4mA and screw them up to the original datasheet amperes i did 570 on the Kathode and got 165Volts on the Anode and 2.8V on the Grid, this means a current of 5mA and 1,8MOhm on the Grid resistor.
And listen again and again but all changes I made did not have the brightness in sound I was actually looking for. The solution came with an article in Diyaudio member referring to the connection of the Hammond 126B interstage Transformer. The wires are written on like Brown Blue primary which means Brown on B+ and Blue on Anode, and secondary Green and Black, as it looks i thought of Green on the Grid and Black on the Ground.
here the original message from the guy from Stoneville, North Carolina
When using the Hammond interstages, you must observe the following wire connections:
Primary - Brown (B+), Blue (Plate)
Secondary - Black (Grid), Green (Ground)
If you connect the secondary with the green and black backward, you will get very poor frequency response.
And it was like this. Oh wonder, the sound was incredribly clear and this is what i mean with fever for tubes, these expieriences are so good when you get to the right solution