(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)

1 pair) EC92=6AB4 Siemens Halske Germany NOS branded Philips 1967

1 tube) 9ma Gm=5100

1 tube) 9ma Gm=4700

Vplate=250V

Vgrid=-2V

Good Ma range 7.5-10ma

Good Gm 5000-6000

(low noise, balanced, nice detail and extension)