(!!!) (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40.5ma and 42ma)
$ 64.99
1 pair) 47 RCA branded ARCTURUS NOS 1940's
1 tube) 40.5ma Gm=2750 very small section of getter flaked of glass - has no bearing on sound or performance
1 tube) 42.0ma Gm=2600
NOS Ma range 26-31ma
NOS Gm range 2300-2500
(2.5 watts)
(2.5V filament)
See more: vacuum tube
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 (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40.5ma and 42ma) "Pin It")
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