Electronic tube and vacuum tube catalog

Base

—

Socket code

B9A

Sections

2

Heater

6.3 V / 300 mA

Plate

S2: 330 V

Screen

S2: 330 V

rP

S2: 90,000 Ω

gm

S2: 3.2 mA/V

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

Diode and twin-plate tetrode designed specifically for frequency-divider and complex-wave-generator circuits, combining switching or waveform generation with an integrated rectifying/control diode.

Base

9QG

Socket code

B9A

Sections

2

Heater

6.3 V / 300 mA

Plate

S2: 330 V / 1 W

Screen

S2: 330 V / 0.65 W

Ik max

S1: 1 mA

Rectifier

S1: 1 A

rP

S2: 30,000 Ω

gm

S2: 3.4 mA/V

μ

S2: 45

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

Diode and three-plate tetrode for frequency-divider and complex-wave-generator circuits in electronic musical instruments, intended for pulse and timing service rather than ordinary amplification.

Base

—

Socket code

—

Sections

2

Heater

20 V / 180 mA

Plate

S2: 200 V

Screen

S2: 200 V / 0.25 W

gm

S2: 1.2 mA/V

Philips binode combining a signal diode with an amplifying tetrode for receiver detection and signal amplification, integrating two radio signal-processing functions in one envelope.