(!!!!) (Recommended Pair) JAN-5755 Raytheon Black Plates NOS 1971-1979 (1.5/1.7ma and 1.5/1.8ma)

1 pair) JAN-5755 Raytheon Black Plates NOS most 1971-1979

1 tube) 1.5/1.7ma Gm=1300/1400 (1979)

1 tube) 1.5/1.8ma Gm=1300/1500 (1971)



Good Ma 1.5-2.0ma

Good Gm = 1400-1500



Matched on Amplitrex



also see 420A/5755 Western Electric