(!!!!) (Best Raytheon Pair) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.8ma and 1.9/1.7ma)

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

1 tube) 1.7/1.8ma Gm=1500/1500

1 tube) 1.9/1.7ma Gm=1500/1400

Good Ma 1.5-2.0ma

Good Gm = 1400-1500

Matched on Amplitrex

also see 420A/5755 Western Electric