(!!) (Good Value Pair) 6384 Tungsol used/good 1967-1969 same build, 1 tube has slightly tilted glass (59.5ma and 60ma)1 matched pair) 6384 Tungsol used good 1967 1969 same build, 1 tube has slightly tilted glass 1 tube) 59. 5ma Gm=5100 (JAN 6384) 1969 on right 1 tube) 60. 0ma Gm=4800 (6384) 1967 tilted glass on left Matched on Amplitrex Vplate=250V Vscreen=250V Vgrid= 25V Good used Ma range = 60 65ma Good used Gm range = 4500 5000 DIY amps