Electronic tube and vacuum tube catalog

Base

9DX

Socket code

B9A

Sections

2

Heater

6.3 V / 450 mA

Plate

S1: 300 V / 3 W · S2: 300 V / 2.5 W

Screen

S1: 300 V / 1 W

rP

S1: 150,000 Ω · S2: 8,200 Ω

gm

S1: 7 mA/V · S2: 4.9 mA/V

μ

S2: 40

9 pins - B9A - Small-button Noval 9-contact

Medium-mu triode plus sharp-cutoff pentode combination; available documentation establishes the construction but does not support one dominant application strongly enough for reassignment.

Base

9DX

Socket code

B9A

Sections

2

Heater

6.3 V / 600 mA

Plate

S1: 300 V / 3 W · S2: 300 V / 2.5 W

Screen

S1: 300 V / 1 W

rP

S1: 150,000 Ω · S2: 5,150 Ω

gm

S1: 7 mA/V · S2: 3.3 mA/V

μ

S2: 17

9 pins - B9A - Small-button Noval 9-contact

Sharp-cutoff pentode and medium-mu triode designed for television frequency-changing and amplifier service.