27 National Union engraved base used/good 1930's (4.4ma)
$ 12.99
27 National Union engraved base used/good 1930's
4.4ma
Gm=700
Tested on Amplitrex
Vplate=250V
Vgriod=-21V
NOS Ma = 4.6-5ma
NOS Gm=900
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