Electronic tube and vacuum tube catalog

Base

9DC

Socket code

B9A

Sections

2

Heater

6.3 V / 450 mA

Plate

S1: 250 V / 1.5 W · S2: 250 V / 1.7 W

Screen

S2: 175 V / 0.5 W

Ik max

S1: 14 mA · S2: 14 mA

rP

S1: 20,000 Ω · S2: 400,000 Ω

gm

S1: 5 mA/V · S2: 6.2 mA/V

μ

S1: 47

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

Medium-mu triode plus sharp-cutoff pentode used primarily for television frequency-changer service.

Base

9DC

Socket code

B9A

Sections

2

Heater

6 V / 450 mA

Plate

S1: 250 V / 1.5 W · S2: 250 V / 2.5 W

Screen

S2: 150 V / 0.75 W

Ik max

S1: 14 mA · S2: 14 mA

rP

S1: 8,500 Ω · S2: 300,000 Ω

gm

S1: 4.5 mA/V · S2: 7.5 mA/V

μ

S1: 38 · S2: 20

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

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Base

9C12

Socket code

B9A

Sections

2

Heater

6.3 V / 430 mA

Plate

S1: 250 V / 1.7 W · S2: 250 V / 1.5 W

Screen

S1: 175 V / 0.5 W

Ik max

S1: 14 mA · S2: 14 mA

rP

S1: 4,000,000 Ω · S2: 4,000 Ω

gm

S1: 6.5 mA/V · S2: 5 mA/V

μ

S1: 47 · S2: 50

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

Triode-pentode combination for receiver and amplifier service; available source material does not establish a narrower functional role confidently.