(!!!) (Best Value Pair) 12A Sylvania NOS and Philco like new 1930”s – 1940”s same build (6.7ma and 6.8ma)

1 pair) 12A Sylvania NOS and Philco like new 1930”s – 1940”s same build

1 tube) 6.8ma Gm=1600 Sylvania NOS

1 tube) 6.7ma Gm=1500 Sylvania Philco like new

Vplate = 180V

Vgrid = -13.5V

Good used Ma = 5.5 – 7ma

Good used Gm = 1400-1600

– RCA Radiola 16 from 1928