Electronic tube and vacuum tube catalog

Base

—

Socket code

OCTAL7

Electrical Summary

Heater	12.8 V / 500 mA
Plate	250 V / 11 W
Screen	250 V
Ik max	200 mA
rP	5,000 Ω
gm	14 mA/V

Sections

1

7 pins - OCTAL7 - 7-contact octal-family base

Output pentode designed specifically for television horizontal-output service, providing the pulse-current and voltage capability required to drive a line-deflection transformer.

Base

9AS

Socket code

B9A

Electrical Summary

Heater	21 V / 300 mA
Plate	250 V / 8 W
Screen	250 V / 4.5 W
Ik max	150 mA
gm	6.5 mA/V

Sections

1

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

PL81/21A6 beam-power pentode designed for television horizontal line-output and deflection service.

Base

Refer to variations

Socket code

B9A

Electrical Summary

Heater	21.5 V / 300 mA

Sections

1

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

300 mA series-heater power pentode designed for television horizontal line-sweep amplifier service.

Base

Refer to variations

Socket code

B7G

Electrical Summary

Heater	35 V / 300 mA

Sections

1

7 pins - B7G - Miniature 7-contact

300 mA series-heater power pentode designed specifically for television horizontal line-sweep amplification and repetitive flyback pulse service.

Base

38A

Socket code

B9D

Electrical Summary

Heater	40 V / 300 mA
Plate	700 V / 34 W
Screen	250 V / 7 W
Ik max	500 mA

Sections

1

9 pins - B9D - Magnoval 9-contact

Magnoval power pentode for color-television horizontal-deflection output, combining approximately 34 W plate dissipation with very high instantaneous plate current.

Base

5BT

Socket code

IO

Electrical Summary

Heater	50 V / 300 mA
Plate	175 V / 15 W
Screen	175 V / 5 W
rP	7,200 Ω
gm	7.4 mA/V

Sections

1

8 pins - IO - International Octal

50 V-heater power pentode designed as a television line time-base output valve, providing the switching current and multi-kilovolt pulse tolerance required for horizontal scanning.

Base

9AS

Socket code

B9A

Electrical Summary

Heater	6.3 V / 1.05 A
Plate	300 V / 8 W
Screen	300 V / 4.5 W
Ik max	180 mA
rP	15,000 Ω
gm	4.6 mA/V
μ	5.1

Sections

1

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

Power-amplifier pentode designed specifically for television horizontal-deflection service.

Base

Refer to variations

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.25 A
Plate	300 V / 10 W
gm	14 mA/V

Sections

1

7 pins - IO - International Octal

Television line-output pentode designed for horizontal sweep service, also capable of Class-B audio power operation.

Base

Octal7Pin

Socket code

Refer to variations

Electrical Summary

Heater	6.3 V / 1.4 A
Plate	800 V / 25 W
Screen	400 V / 8 W
Ik max	200 mA
rP	20,000 Ω
gm	14 mA/V
μ	15.5

Sections

1

7 pins

Television line-time-base output pentode designed for horizontal sweep service with very high pulse-voltage capability.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 1.05 A
Plate	550 V / 8 W
Ik max	180 mA

Sections

1

9 pins

Power pentode designed for television line-output and horizontal-deflection amplifier service.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.65 A
Plate	550 V / 17.6 W
Screen	275 V / 5 W

Sections

1

8 pins - IO - International Octal

High-power pentode designed for television line-output and horizontal-deflection sweep service.

Base

—

Socket code

B9E

Electrical Summary

Heater	6.3 V / 450 mA
Plate	33 W
Screen	250 V
gm	14 mA/V

Sections

1

B9E - Novar 9-contact

High-current power pentode intended for television horizontal-deflection and related power-amplifier service, with approximately 33 W plate dissipation and strong pulse capability.

Base

Octal

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.2 A
Plate	400 V / 12 W
Screen	300 V / 5.5 W
Ik max	220 mA
rP	5,000 Ω
gm	14 mA/V
μ	5.6

Sections

1

8 pins - IO - International Octal

Rugged long-life power pentode for high-current service including television horizontal-deflection output, combining substantial pulse capability with special-quality construction.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 1.65 A
Plate	550 V / 17.6 W
Screen	275 V / 5 W

Sections

1

8 pins

High-power output pentode designed specifically for television horizontal line-deflection, providing substantial current and flyback-voltage capability for magnetic line-output stages.

Base

Octal

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.4 A
Plate	400 V / 25 W
Screen	400 V / 6 W
Ik max	200 mA
rP	20,000 Ω
gm	14 mA/V
μ	16.5

Sections

1

8 pins - IO - International Octal

High-power output pentode primarily designed for television line time-base output, providing approximately 25 W plate dissipation and substantial voltage/current swing.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.4 A
Plate	400 V / 25 W
Screen	400 V / 6 W
gm	14 mA/V

Sections

1

8 pins - IO - International Octal

EL38 variant intended for television line time-base power stages, combining approximately 25 W plate dissipation with substantial horizontal-deflection output capability.

Base

—

Socket code

P8A

Electrical Summary

Heater	6.3 V / 1.35 A
Plate	800 V

Sections

1

8 pins - P8A - European 8-pin side-contact base

High-voltage output pentode designed primarily for Class-B audio power amplification, with published push-pull operating data and plate ratings reaching approximately 800 V.

Base

—

Socket code

B9A

Electrical Summary

Heater	6.3 V / 1.7 A
Screen	4.5 W

Sections

1

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

High-current power pentode designed for television horizontal line-deflection amplification and repetitive flyback pulse service.

Base

9C18

Socket code

B9D

Electrical Summary

Heater	6.3 V / 1.38 A

Sections

1

9 pins - B9D - Magnoval 9-contact

High-perveance power pentode dedicated to television horizontal line-output amplification, providing the large current pulses required by magnetic deflection transformers.

Base

9C18

Socket code

B9D

Electrical Summary

Heater	6.3 V / 2.5 A
Plate	900 V / 35 W
Screen	300 V / 7 W
Ik max	500 mA
rP	8,000 Ω
gm	18 mA/V

Sections

1

9 pins - B9D - Magnoval 9-contact

Heavy-duty power pentode for color-television horizontal-deflection output, combining approximately 35 W plate dissipation, high transconductance, and demanding flyback capability.

Base

—

Socket code

P8A

Electrical Summary

Heater	6.3 V / 1.4 A
Plate	800 V / 25 W
Screen	300 V
gm	11 mA/V

Sections

1

8 pins - P8A - European 8-pin side-contact base

Power pentode designed for audio and industrial power-amplifier service; unlike the surrounding batch, the available datasheets do not identify it as a television line-output tube.

Base

—

Socket code

B9A

Electrical Summary

Heater	6.3 V / 1.3 A

Sections

1

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

Power pentode designed for television line-deflection amplification and horizontal time-base output service.

Base

Refer to variations

Socket code

B9D

Electrical Summary

Heater	6.3 V / 2 A
Plate	250 V / 40 W
Screen	275 V
Ik max	500 mA

Sections

1

9 pins - B9D - Magnoval 9-contact

High-power line-output pentode designed for color-television horizontal-deflection circuits.

Base

B9A

Socket code

B9A

Electrical Summary

Heater	6.3 V / 1.05 A
Plate	300 V / 8 W
Screen	250 V / 4.5 W
Ik max	180 mA
rP	15,000 Ω
gm	11 mA/V

Sections

1

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

Output pentode designed for television line time-base service and also usable as a series-regulator valve in stabilized power supplies.

Base

—

Socket code

B9A

Electrical Summary

Heater	20 V / 300 mA
Plate	300 V / 12 W
Screen	200 V / 4.5 W

Sections

1

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

Power pentode designed for television line time-base output service.

Base

—

Socket code

B9A

Electrical Summary

Heater	35 V / 300 mA
Plate	250 V / 16 W
Screen	250 V / 4.5 W
Ik max	300 mA
gm	20 mA/V

Sections

1

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

Power pentode designed for 110-degree television horizontal line time-base output service.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	35 V / 300 mA

Sections

1

Power pentode identified as a television horizontal line-sweep output type.

Base

—

Socket code

IO

Electrical Summary

Heater	30 V / 300 mA
Plate	800 V / 12 W
Screen	400 V / 8 W
Ik max	200 mA
rP	20,000 Ω
gm	13.5 mA/V

Sections

1

8 pins - IO - International Octal

Series-heater line-output pentode designed for television horizontal time-base service.

Base

—

Socket code

IO

Electrical Summary

Heater	30 V / 300 mA
Plate	800 V / 12 W
Screen	400 V
rP	20,000 Ω
gm	13.5 mA/V

Sections

1

8 pins - IO - International Octal

Metallised PL38 output-pentode variant designed for television line time-base output service.

Base

—

Socket code

B9D

Electrical Summary

Heater	27 V / 300 mA
Plate	7,000 V / 25 W
Ik max	500 mA

Sections

1

9 pins - B9D - Magnoval 9-contact

High-power line-output pentode designed for color-television horizontal-deflection circuits.

Base

B9D

Socket code

B9D

Electrical Summary

Heater	17 V / 300 mA
Plate	400 V / 12 W
Screen	275 V / 3 W
Ik max	100 mA
rP	10,000 Ω
gm	9 mA/V

Sections

1

9 pins - B9D - Magnoval 9-contact

Power pentode designed for color-television line-output and horizontal-deflection amplification.

Base

38A

Socket code

B9D

Electrical Summary

Heater	40 V / 300 mA
Plate	700 V / 30 W
Screen	275 V / 7 W
Ik max	500 mA

Sections

1

9 pins - B9D - Magnoval 9-contact

Power pentode designed for color-television line-output and horizontal-deflection amplification.

Base

—

Socket code

B9D

Electrical Summary

Heater	27 V / 300 mA

Sections

1

9 pins - B9D - Magnoval 9-contact

Power pentode designed for television line-output and horizontal-deflection amplification.

Base

Refer to variations

Socket code

B9D

Electrical Summary

Heater	40 V / 300 mA
Plate	700 V / 35 W
Screen	275 V / 7 W
Ik max	500 mA

Sections

1

9 pins - B9D - Magnoval 9-contact

High-power line-output pentode designed for color-television horizontal deflection.

Base

Noval

Socket code

B9A

Electrical Summary

Heater	21.5 V / 300 mA
Plate	250 V / 8 W
Screen	250 V / 4.5 W
Ik max	180 mA
rP	10,000 Ω
gm	6.2 mA/V
μ	5.3

Sections

1

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

Television line-time-base output pentode designed to scan wide-angle CRTs from relatively low HT supply voltages.

Base

B9D

Socket code

B9D

Electrical Summary

Heater	21.5 V / 300 mA
Plate	250 V / 7.5 W
Screen	250 V
Ik max	180 mA
rP	11,500 Ω
gm	6 mA/V
μ	4.9

Sections

1

9 pins - B9D - Magnoval 9-contact

Line-output pentode designed for horizontal-deflection service in portable television receivers.

Base

—

Socket code

B9A

Electrical Summary

Heater	21.5 V / 300 mA
Plate	250 V / 8 W
Screen	250 V / 4.5 W
Ik max	180 mA
rP	11,000 Ω
gm	6 mA/V

Sections

1

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

Power pentode designed for television horizontal line time-base service and also suitable for sound-output amplification.

Base

—

Socket code

B8A

Electrical Summary

Heater	45 V / 100 mA
Plate	300 V
Screen	300 V
gm	7 mA/V

Sections

1

8 pins - B8A - Rimlock 8-contact

Series-heater television line-output pentode designed for horizontal time-base circuits with high peak plate-voltage capability.

Base

—

Socket code

IO

Electrical Summary

Heater	12.8 V / 600 mA
Plate	250 V / 12 W
Screen	250 V / 1.5 W
Ik max	200 mA

Sections

1

8 pins - IO - International Octal

Output pentode designed for television horizontal deflection and also specified for Class-B audio-frequency amplifier use.