Six years after building my first phono preamp, I finally listened to it this morning. Loved it! It started out as a 5687 version of the 6DJ8 passive designs (like Bottlehead and others). Obviously, I had miscalculated the losses in my filter and cut-n-jumpered my board to accommodate the 6DJ8, getting about 37dB of gain at 1kHz. The tricky bit was the power supply, which is a 12V power supply (not a wall wart, but a computer type switcher) and a National Semi LM3478 running at 220V and 400kHz. The noise on the supply was just too much, and I fiddled with it back then and then gave up. Just returned to it yesterday and actually listened to it. Not bad at all, really. I think some tweaking can get the supply fairly respectable. One other note: the four triode halves use the IXYS 10M45S as plate loaded CCS. Kinda cool.
Now to add a 2SK170BL to the first 6DJ8 in a cascode configuration ala the old Tek scopes and Allen Wright's FVP5A preamp. Probably will add two more 6DJ8s (paralleled) as the third stage with a switch to let this act as a linestage.