(!) Recommended Pair) 37 RCA branded GE NOS 1946 and RCA like new 1930's (7.3ma and 8.3ma)
$ 44.99
1 pair) 37 RCA branded GE NOS 1946 and RCA like new 1930's
1 tube) 7.3ma Gm=1100 RCA branded GE NOS 1946 NOS
1 tube) 8.3ma Gm=1100 RCA Cunningham engraved abse 1930's like new
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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 Recommended Pair) 37 RCA branded GE NOS 1946 and RCA like new 1930's (7.3ma and 8.3ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/3_1_b4747878-1827-4ff9-a591-aa642d55a43b.jpg?v=1769200077){kind=link}
 Recommended Pair) 37 RCA branded GE NOS 1946 and RCA like new 1930's (7.3ma and 8.3ma) "Pin It")