Electronic tube and vacuum tube catalog

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 300 mA
Plate	8,000 V / 12 W
Ik max	5 mA
rP	525,000 Ω
gm	0.95 mA/V
μ	500

Sections

1

8 pins - IO - International Octal

National Union 2C53 very-high-mu indirectly heated high-voltage shunt-regulator triode for stabilized power supplies, with 8 kV maximum plate voltage and amplification factor 500.

Base

—

Socket code

B9A

Electrical Summary

Heater	6.3 V / 800 mA
Plate	200 V / 12 W
Ik max	100 mA
rP	2,000 Ω
gm	6.5 mA/V
μ	3.75

Sections

1

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

High-voltage triode designed for electronic voltage-regulator service, controlling or shunting current to stabilize demanding power supplies.

Base

6BD4

Socket code

B7G

Electrical Summary

Heater	6.3 V / 600 mA
Plate	300 V / 20 W
Ik max	1.5 mA
μ	1,650

Sections

1

7 pins - B7G - Miniature 7-contact

High-voltage triode designed for electronic voltage-regulator service, controlling or shunting current to stabilize demanding power supplies.

Base

6BD4

Socket code

B7G

Electrical Summary

Heater	6.3 V / 600 mA
Plate	27,000 V / 25 W
Ik max	1.5 mA
μ	1,650

Sections

1

7 pins - B7G - Miniature 7-contact

Sharp-cutoff beam triode for high-voltage shunt regulation; 27 kV maximum plate voltage, 25 W dissipation, μ 1650.

Base

8GC

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 2.5 W
Ik max	6 mA
gm	0.2 mA/V
μ	2,000

Sections

1

8 pins - IO - International Octal

High-voltage triode designed for electronic voltage-regulator service, controlling or shunting current to stabilize demanding power supplies.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 30 W
Ik max	1.6 mA
gm	0.2 mA/V
μ	2,000

Sections

1

8 pins - IO - International Octal

High-voltage triode designed for electronic voltage-regulator service, controlling or shunting current to stabilize demanding power supplies.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
Ik max	1.6 mA
gm	0.2 mA/V
μ	2,000

Sections

1

8 pins - IO - International Octal

High-voltage triode designed for electronic voltage-regulator service, controlling or shunting current to stabilize demanding power supplies.

Base

SMW

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
Ik max	1.6 mA
gm	0.2 mA/V
μ	2,000

Sections

1

8 pins - IO - International Octal

High-voltage beam triode used as a shunt regulator for low-current DC supplies in color and black-and-white television receivers.

Base

—

Socket code

B9A

Electrical Summary

μ	1,515

Sections

1

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

High-voltage beam triode designed to regulate color-television anode and focus supplies over approximately the 5–25 kV range.

Base

Refer to variations

Socket code

B12C

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 30 W
Ik max	1.6 mA

Sections

1

B12C - Duodecar 12-contact

High-voltage beam triode designed for shunt regulation in color-television high-voltage power supplies.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
gm	0.2 mA/V

Sections

1

Refer to variations

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 30 W

Sections

1

Refer to variations

Base

—

Socket code

B12C

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
gm	0.2 mA/V

Sections

1

12 pins - B12C - Duodecar 12-contact

Duodecar beam triode used as a shunt regulator in color-television high-voltage power supplies, electrically identical to type 6EJ4A.

Base

Refer to variations

Socket code

B12C

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
gm	0.2 mA/V

Sections

1

12 pins - B12C - Duodecar 12-contact

Low-current high-voltage beam triode for color-television shunt regulation, incorporating X-radiation shielding and design controls to reduce radiation output.

Base

8GC

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
Ik max	1.6 mA
gm	0.2 mA/V

Sections

1

8 pins - IO - International Octal

High-voltage beam triode for shunt regulation of low-current television power supplies.

Base

8NJ

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	30,000 V / 40 W
gm	0.2 mA/V
μ	2,000

Sections

1

8 pins - IO - International Octal

Sharp-cutoff beam triode used as a shunt high-voltage regulator in color-television power supplies, with explicit X-radiation operating limits.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W
gm	0.2 mA/V

Sections

1

Base

8MQ

Socket code

—

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W

Sections

1

8 pins

Beam triode used for shunt regulation of high-voltage, low-current television power supplies, with explicit X-radiation safety limits.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	6.3 V / 200 mA
Plate	27,000 V / 40 W

Sections

1

Refer to variations

Base

8NP

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	30,000 V / 40 W
Ik max	1.5 mA
gm	0.2 mA/V

Sections

1

8 pins - IO - International Octal

GE 6MA6 high-voltage beam triode for color-TV shunt regulation, rated 30 kV and 40 W with built-in X-ray shielding.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 200 mA
Plate	25,000 V / 25 W
Ik max	150 mA
gm	0.25 mA/V

Sections

1

8 pins - IO - International Octal

Russian high-voltage triode for specialized electronic service. Available source material does not establish a narrower functional category confidently.

Base

—

Socket code

B9A

Electrical Summary

Heater	6.3 V / 300 mA
Plate	1,500 V / 3 W
gm	1 mA/V

Sections

1

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

High-voltage Russian triode designed specifically to function as a voltage stabilizer in electronic power-supply circuits.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 1 A
Plate	350 V
Ik max	140 mA
rP	350 Ω
gm	8.5 mA/V

Sections

1

Russian miniature regulator triode designed specifically for electronic voltage stabilizers and regulated power supplies.

Base

Refer to variations

Socket code

B9A

Electrical Summary

Heater	6.3 V / 950 mA
Plate	15 W
Ik max	120 mA
rP	375 Ω
gm	12 mA/V
μ	4.5

Sections

1

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

Low-impedance triode designed particularly as the series-pass valve in stabilized electronic power supplies.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 1.1 A
Plate	300 V / 15 W
Ik max	125 mA
gm	11 mA/V
μ	4.5

Sections

1

Rugged indirectly heated low-impedance triode designed for electronic stabilizer service under extreme shock and vibration.

Base

—

Socket code

B9D

Electrical Summary

Heater	6.3 V / 350 mA
Plate	25,000 V / 30 W
Ik max	1.5 mA

Sections

1

B9D - Magnoval 9-contact

High-voltage shunt-regulator triode designed specifically to stabilize color-television extra-high-tension supplies.

Base

—

Socket code

MAGNOVAL

Electrical Summary

Heater	6.3 V / 400 mA
Plate	27,000 V / 40 W
Ik max	1.6 mA
gm	0.2 mA/V

Sections

1

MAGNOVAL - Magnoval 9-contact base

Magnoval power triode designed for shunt regulation of low-current extra-high-tension supplies in television and related equipment.

Base

—

Socket code

B9A

Electrical Summary

Heater	6.3 V / 210 mA
Plate	30,000 V / 37.5 W
Ik max	2 mA
gm	0.7 mA/V
μ	2,750

Sections

1

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

High-voltage beam power triode for shunt-regulator or pulse-modulator service in systems rated to approximately 30 kV.

Base

—

Socket code

IO

Electrical Summary

Heater	4 V / 1.5 A
Plate	20,000 V / 30 W
Ik max	10 mA
μ	300

Sections

1

IO - International Octal

High-voltage control triode for shunt regulation and variable-resistance service in high-voltage DC power supplies.

Base

B9D

Socket code

B9A

Electrical Summary

Heater	7.3 V / 300 mA
Plate	25,000 V / 30 W
Ik max	1.6 mA

Sections

1

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

High-voltage shunt-regulator triode for stabilizing the extra-high-tension supply in color television receivers.

Base

Magnoval

Socket code

B9A

Electrical Summary

Heater	7.3 V / 300 mA
Plate	25,000 V / 30 W
Ik max	1.6 mA

Sections

1

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

High-voltage shunt-regulator triode for stabilizing the extra-high-tension supply in color television receivers.