(!!!) (Recommended Pair) 420A Western Electric NOS 1979 (1.6/1.7ma and 1.6/1.6ma)
$ 89.99
1 pair) 420A Western Electric NOS 1979 closely matched
1 tube) 1.6/1.7ma Gm=1500/1500
1 tube) 1.6/1.6ma Gm=1450/1500
Matched on Amplitrex
Vplate=180V
Vgrid=-.1V
Good Ma = 1.5-2.2ma
Good Gm = 1500
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