Here's the schematic and PCB layout for a successor to the MyRef RevC - it's basically very similar to the MyRef RevC, with a minor change derived from an idea used in the Musical Fidelity MVT.
Basically, the idea is to bypass the darlington LTP of the LM318, and use a lower-noise (and maybe faster and more linear) discrete LTP instead. I'm suggesting NEC 2sc1845 with 390 ohms degeneration on each leg, and a 33k resistor to set the tail current (which should improve H2 compared to an active current source) - these values are just placeholders, which will be tweaked after prototyping and auditioning. I expect that the change will result in darker silences and improved dynamic range over the RevC, which should be discernible on quiet passages.
Basically, the idea is to bypass the darlington LTP of the LM318, and use a lower-noise (and maybe faster and more linear) discrete LTP instead. I'm suggesting NEC 2sc1845 with 390 ohms degeneration on each leg, and a 33k resistor to set the tail current (which should improve H2 compared to an active current source) - these values are just placeholders, which will be tweaked after prototyping and auditioning. I expect that the change will result in darker silences and improved dynamic range over the RevC, which should be discernible on quiet passages.