Electronic tube and vacuum tube catalog

Base

9FA

Socket code

B9A

Sections

2

Heater

4.7 V / 600 mA

Plate

S1: 300 V / 2.7 W · S2: 300 V / 2.8 W

Screen

S2: 300 V / 0.5 W

rP

S1: 5,000 Ω · S2: 400,000 Ω

gm

S1: 8.5 mA/V · S2: 5.2 mA/V

μ

S1: 40

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

Medium-mu triode plus sharp-cutoff pentode used as a combined oscillator and mixer in VHF television tuners.

Base

9FA

Socket code

B9A

Sections

2

Heater

4.7 V / 600 mA

Plate

S1: 330 V / 2 W · S2: 330 V / 2.3 W

Screen

S2: 330 V / 0.55 W

Ik max

S1: 20 mA

rP

S1: 5,000 Ω · S2: 200,000 Ω

gm

S1: 8 mA/V · S2: 6.5 mA/V

μ

S1: 40

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

Medium-mu triode and sharp-cutoff pentode used together as oscillator and mixer in VHF television tuners.