6DN7 RCA Mexco coin-base same internals as Sylvania NOS 1970's (40ma and 8.5ma)
$ 14.99
1 tube) 6DN7 RCA Mexco coin-base same internals as Sylvania NOS 1970's
40ma Gm=12,500
8.5ma 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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See more: vacuum tube
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