(!) 47 RCA Radiotron engraved base used/good 1930's (27.5ma Gm=2250)
$ 21.99
1 tube) 47 RCA Radiotron engraved base used/good 1930's in white box
27.5ma
Gm=2250
NOS Ma range 26-31ma
NOS Gm range 2300-2500
(2.5 watts)
(2.5V filament)
See more: vacuum tube
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 47 RCA Radiotron engraved base used/good 1930's (27.5ma Gm=2250)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_e9e29959-b545-4b34-b3d0-165d22e2a683.jpg?v=1571439288){kind=link}
 47 RCA Radiotron engraved base used/good 1930's (27.5ma Gm=2250) "Pin It")