(!!!) (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40.5ma and 42ma)

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)