We had a server crash and lost a lot of schematic files. Go to any post link that no longer works and post that you need it there. That will wake up the old thread and someone will repost the drawings.
The tubes may be new, but are they right? There are three small tubes on the power amp, two 12AU7 and one 12AX7. Make sure they are not all 12AX7s or somnething. And the two 12AU7s are in the sockets tight behind the two bias controls, make sure.
Does the bias adjust LEDs set up OK?
Does it make this noise with nothing playing? With nothing plugged into the inputs? AMp is noisy all by itself? If so, isolate the problem. PLug something into the power amp in jack, preferable a shorting plug. Noise stop or continue? That will tell you power amp or preamp.
For that matter, run a cord from the preamp out jack to some other amp for a listen, noise coming out of that?