We are trying to get as close to an authentic Rangemaster, no gilding the lily, or reinventing the wheel.
we use the following parts:
Mullard/Philips OC44.
Sprague 50uF capacitors.
Styroflex Input/Outputs capacitors.
Vishay PR02 5% resistors.
Van Damme Pro Grade Shielded cable.
Neutrik jack's.