EF40 Siemens by Valvo Germany NOS 1956 (3.0ma)
By Tube World
$ 11.99
EF40 Siemens by Valvo Hamburg Germany NOS 1956 in white box
3.0ma
Gm=1600
Good mA range 2.5-3.5ma
Good Gm 1800+
See more: vacuum tube
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