(!) (Best Pair) 6S4A Tungsol NOS "D" and "U" getter halo 1957-1960 (24.5ma and 26ma)
$ 15.99
1 pair) 6S4A Tungsol NOS black plates 1957-1960
1 tube) 24.5ma and Gm=4400 "D" getter halo 1957
1 tube) 24.5ma and Gm=4400 "U" getter halo 1957-1960
Tested on Amplitrex
Vplate=250V
Vgrid=-8V
Good Ma range 20-25ma
Good Gm range 4000-4500
(the 6S4A features high plate current at relatively low plate voltages and is capable
of withstanding high pulse voltages)(Vfil=6.3V @ 600ma)
MAX Ratings: Vplate=550V, Iplate=30ma, Pout=8.5 watts
Typical Operation: Vplate=250V, Vgrid=-8V, Iplate=24ma, Mu=16.5, Gm=4500, Rplate=3700 ohms)
- Woo Audio GES Electrostatic headphone amp
See more: vacuum tube
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 (Best Pair) 6S4A Tungsol NOS "D" and "U" getter halo 1957-1960 (24.5ma and 26ma)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/1_a623fa15-73bd-4de8-8bd0-65ad28dac617.jpg?v=1586700697){kind=link}
 (Best Pair) 6S4A Tungsol NOS "D" and "U" getter halo 1957-1960 (24.5ma and 26ma) "Pin It")