Electronic tube and vacuum tube catalog

Base

9EX

Socket code

B9A

Sections

2

Heater

16 V / 300 mA

Plate

S1: 250 V · S2: 250 V / 7 W

Screen

S2: 250 V / 1.8 W

Ik max

S2: 50 mA

rP

S2: 20,000 Ω

gm

S1: 2.5 mA/V · S2: 6.4 mA/V

μ

S1: 70

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

High-mu triode and power pentode combined for television vertical oscillator/amplifier and audio-output service. The triode provides control or voltage gain while the pentode supplies output power.

Base

9EX

Socket code

B9A

Sections

2

Heater

16 V / 300 mA

Plate

S1: 550 V / 1 W · S2: 550 V / 7 W

Screen

S2: 250 V / 1.8 W

Ik max

S1: 15 mA · S2: 50 mA

rP

S1: 40,000 Ω · S2: 16,000 Ω

gm

S1: 2.2 mA/V · S2: 7.5 mA/V

μ

S1: 70

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

Triode beam-power valve intended primarily for audio-frequency output service, combining a voltage-amplifying triode with a power-output section for compact receiver audio stages.