(!!!) (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)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_90def45c-835f-40a1-9488-e4c9b5e95070.jpg?v=1738272209){kind=link}
 (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40.5ma and 42ma) "Pin It")