E83F=6689 Siemens made in Holland NOS 1966 (8.5ma)
By Tube World
$ 29.99
E83F=6689 Siemens made in Holland NOS gold pins 1966
8.5ma Gm=8700
Tested on Amplitrex
Good Ma 8-10ma
Good Gm 8000-9000
(10,000+ hour low noise Pentode)
- Telefunken v76 preamp
See more: vacuum tube
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