Set of four identical vacuum tubes (valves in British English) from Sylvania
An exception is tube amplifiers from the Japanese brand Leben, whose owner and chief designer, Mr. Taku Hyodo, has a fondness 6CS7 for preamplification stage designs. Presumably because of its high degree of linearity, very robust design and prior availability.
The photo, taken with a Pentax K5 and a 77mm 1.8 lens, shows four Sylvania 6CS7 tubes from the 60s - a so-called matched quad - for use in my treasured Leben CS-600 amplifier.
GIULIO57
14 yearsMember
Firenze-Italia
PPG