(!!) (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma)
By Tube World
$ 34.99
1 pair) 31 Cunningham NOS 1940's
1 tube) 11.6ma and Gm=1000 gold printing
1 tube) 11.0ma and Gm=1000 silver printing
Tested on Amplitrex
Vplate=180V
Vgrid=-30V
Good NOS Ma = 11 -12ma
Good Gm = 1000
See more: vacuum tube
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 (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_adfbecbd-a793-407b-a6f8-c9cbc92b0097.jpg?v=1683736787){kind=link}
 (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma) "Pin It")