Electronic tube and vacuum tube catalog

Base

—

Socket code

IO

Electrical Summary

Heater	33.6 V / 450 mA
Plate	S1: 3.5 WS2: 400 V / 9 W
Screen	S2: 150 V / 2.5 W
Ik max	S2: 140 mA
Rectifier	S1: 125 mA
V Drop	S1: 21 V
V Inverse	S1: 2,500 V
rP	S2: 10,000 Ω
gm	S2: 6.5 mA/V
μ	S2: 4

Sections

2

12 pins - IO - International Octal

Beam-power output tube intended for audio-frequency power amplification in series-heater radio or television receiving equipment.

Base

9RA

Socket code

B9A

Electrical Summary

Heater	6.3 V / 1.2 A
Plate	S1: 425 V / 10 W
Screen	S1: 330 V / 2 W
Ik max	S1: 70 mA
Rectifier	S2: 1 mA
V Drop	S2: 5 V
V Inverse	S2: 425 V
rP	S1: 10,500 Ω
gm	S1: 4.2 mA/V
μ	S1: 6.5

Sections

2

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

High-current beam-power tube explicitly designed for television horizontal-output and line-deflection service, with substantial flyback pulse-voltage capability.