Cliff has said that the schematic doesn't tell the whole story, you need the amp to take measurements, with only the schematic you run the risk of getting a tottaly different result from the real amp.
I just built one based on the schematics and the help of others who have dissected the amp. They have more than the schematics
they have the various voltage measurement through out the amps. They even have measured resistance and capacitance values where appropriate unlike many amps there are internal variable resistors that need to be adjusted to get the smoothest tone.
It is a very complex beast. The main guitar signal is carried via coaxial cable rather than standard wire. the outer wire is surrounding the core is grounded in very specific locations in the amp. The coaxial cable itself has a capacitance value that has been documented. The type of resistors and caps at every point is also well documented. End result its the best sounding amp I own!! I am comparing it to my other amps including,
fender original 1965 deluxe reverb, carr , victoria, louis electric , fender 50's high power tweed, metropolitan tone king and the axe.
Playing this amp reminds me, as amazing as the Axe FX is there is still much more to be done to capture that "authentic tube sound" if it is even really possible. That being said, being a cork sniffer tube amp guy, no one has come closer than Cliff and I am sure over the coming years
as the technology evolves the gap will continue to close.
Here is a picture of my amp the inside the white cables are the teflon coated coaxial cables unique to dumble amp
Having built several amps in the past this by far was the most difficult and complex build I have attempted. This amp took me almost a year to build although I worked on it on and off some of the difficulty was finding the exact correct parts, to give you an idea of a comparison It took me only a few hours to build a fender champ.
