1608 RCA white ceramic base NOS in white box 1940 era (32.5ma)

1 tube) 1608 RCA white ceramic base NOS in white box 1940 era

Vplate=350V, Vgrid=-10V Iplate=32.5ma Gm=5400 (NOS = 36ma) 1937 RCA data sheet

Vplate=425V, Vgrid=-15V Iplate=29.2ma Gm=5100 (NOS = 30ma) 1937 RCA data sheet

1 TUBE, NOT A PAIR 

1608=801 specs with mu raised to 20 versus 801/801A mu = 8

1608 has a 2.5V filament, 801 and 801A has a 7.5V filament

1608: quick heating filament: 2.5V filament @ 2.5amps