Description
(!!!!!) (Best Pair) 6550A GE NOS “stapled plates” 1985-1986 (138.8ma and 139.2ma) 1-2% matched
1 pair) 6550A GE NOS “stapled plates” 1985-1986 – large shiney getters on both tubes – excellent pair – sweet lush midrange
1 tube) 138.8ma and Gm=11,800
1 tube) 139.2ma and Gm=11,650
TUBES PLUGGED INTO OCTAL SOCKETS IN PHOTO
Good Ma range 120-140ma
Good Gm range = 10,000 – 12,000
(warm and punchy midrange, good bass, a very good 6550 second only to Tungsol 6550 in overall sound and drastically superior to Svetlana or Sovtek 6550)
– ARC VT60, ARC VT100 MarkII and MarkIII, Ref. 300, Ref. 600
– Audio Research Reference 3 line-stage power supply
– Luxman
– Rogue
– Cary
– VTL MB300, MB450, ST-150
– CJ Premier 8 and 11A, 12
– Jadis
– Ampeg SVT
– Comins Alessandro Jazz Guitar Amp
– Cary SLI-80
– THD
– VAC PA100/100
– McIntosh 275 MK IV 2005
– Harmon Kardon
– Audio Aero Capitole Integrated amp
