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(!!) (#1 pair) VT-25-A Hytron made for Western Electric NOS 1940's (33.5ma and 39ma)

$ 289.99

1 pair) VT-25-A Hytron made for Western Electric NOS 1940's

1 tube) 39.0ma Gm=2800

1 tube) 33.5ma Gm=2600

Tested on Amplitrex

Vplate=300V, Vgrid=-15V

Good Ma = 30

 

Tested on Amplitrex

Vplate=220V, Vgrid=-7V

Good Ma = 25

1 tube) 32.5ma Gm=2700

1 tube) 29.0ma Gm=2500

General Information

(Filament=7V @ 1.2A, Vplate=220V, Vgrid=-7V, Iplate=25ma, Mu=6, Rp=6Kohms)

(The VT-25 is built exactly the same as a VT-52, but the plate and grid are spaced  differently yielding different Mu factors and plate resistance)

 

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