Description
(!!!!!) (Best Value Pair) JAN-5687WA Sylvania black plates used/test like new 1967-1970 era (43.6/47ma and 46.8/44.2ma) (Highest Ma and Gm)
1 low noise tube) JAN-5687WA Sylvania black plates used/test like new 1967-1970 era in white boxes
1 tube) 43.6/47.0ma Gm=12,100/12,200 (1967)
1 tube) 46.8/44.2ma Gm=12,400/12,000 (1970 era)
Good Ma range 30-35ma
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth