6DN7 Sylvania NOS 1970 era (39ma and 7.5ma)
$ 19.99
6DN7 Sylvania NOS 1970 era
39ma Gm=13,100
7.5ma Gm=2600
Tested on Amplitrex
1 section) Good NOS Ma=35-40ma and Gm=7000-7700
1 section) Good NOS Ma=8ma and Gm=2500
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