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(!) (#1 404A Pair) 404A Western Electric used/good 1963 (27ma and 30.5ma)

(!) (#1 404A Pair) 404A Western Electric used/good 1963 (27ma and 30.5ma)

$ 59.99

1 matched pair) 404A Western Electric used/good (6339=1963) 

1 tube) 27.0ma Gm=16,500

1 tube) 30.5ma Gm=18,500

 

Tested on Amplitrex

Vplate=150V

Vscreen=150V

Vgrid=-1.5V

Good like new Ma range 18-20ma

Good used Gm range 12,000 - 13,000

 

 

 

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