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(!!!) (~ Recommended Pair ~) 420A Western Electric NOS 1979 (1.6/1.7ma and 1.6/1.6ma)

(!!!) (~ Recommended Pair ~) 420A Western Electric NOS 1979 (1.6/1.7ma and 1.6/1.6ma)

$ 84.99

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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