(!) 47 RCA Radiotron engraved base used/good 1930”s (27.5ma Gm=2250)

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)