37 GE ribbed plate NOS 1943 (8.0ma)
$ 16.99
37 GE ribbed plate NOS 1943
8.0ma
Gm=1100
Test parameters:
Vplate=250V
Vgrid=-18V
Iplate good range 6.5-8ma
Gm=1000-1100
(Filament=6.3V @ 300ma, many think the 37 sounds better than the 76)
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