(!!!!) (Best Value Pair) 71A RCA and Ken Rad used/good 1930”s (22ma and 22.6ma)

1 pair) 71A RCA and Ken Rad used/good 1930”s – same top mica shape – in white boxes

1 tube) 22.0ma Gm=1700 Ken Rad slightly taller

1 tube) 22.6ma Gm=1800 RCA

Tested on Amplitrex

Vplate=180V

Vgrid=-38V

Good Ma = 20ma

Good Gm = 1600-1700