(!!) (Best Single) CX-220=20 Cunningham NOS 1920's (5.6ma)
By Tube World
$ 79.99
CX-220=20 Cunningham NOS 1920's tube was factory sealed
5.6ma
Gm=400
Tested on Amplitrex
NOS Ma = 5.5-6mA+
NOS Gm = 400-500
Vplate=135V
Vgrid=-22.5V
See more: vacuum tube
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 (Best Single) CX-220=20 Cunningham NOS 1920's (5.6ma) "Pin It")