E83F=6689 Siemens Holland NOS 1963 (10.6ma)
By Tube World
$ 39.99
E83F=6689 Siemens Holland NOS 1963
10.6ma
Gm=9700
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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