Decided to build this amp as the next project. I think it will a good match for the early 70s Drake iron I have lying around from a Carlsbro TR60 chassis. PT gives high voltage on the plates, and is center tapped with diode rectifier. Drake OT for 2x EL34 and a choke. I will just build it into the Carlsbro chassis, and see what happens. The layout I just make based on the past experiences. I'll raise the heaters of the preamp tubes, move V1 as close as possible to the inputs. And then have a center ground buss in between preamp valves and pots, and run the components next and over it to make the signal path as short as possible, and ground the buss close to the PT ground. Last build had virtually no hiss or hum, without using shielded wire. Is this the schematic to follow?