6BX7GT Sylvania black plates NOS 1960's
1 tube) 56ma Gm=8100
1 tube) 76ma Gm=8500
Good Ma range 38-45ma
Good Gm range = 7000-7500
- Single Power
(Vfil=6.3V @ 1.5A, Vplate max=500V, Iplate max=60ma, Pout max = 12 watts total for both triode sides)