1 tube) ECC84=6CW7 Siemens Sonotone NOS (5929=1959)
1 section) 13.8ma Gm=6500
1 section) 11.2ma Gm=5700
Tested on Amplitrex
Vplate=90
Vgrid=-1.5
Good Ma 9-12ma
Good Gm 5000-6000