Electronic tube and vacuum tube catalog

Base

—

Socket code

UX4

Sections

1

Heater

0.9 V / 35 mA

4 pins - UX4 - Medium-shell UX 4-contact

Sylvania directly heated ultra-low-current tetrode for precision DC voltage amplification, intended to operate with careful electrical and light shielding in electrometer-class measurements.

Base

5R

Socket code

UX5

Sections

1

Heater

2 V / 60 mA

Plate

180 V

Screen

67.5 V

rP

600,000 Ω

gm

0.65 mA/V

5 pins - UX5 - Small 5-contact

Variable-mu or remote-cutoff screen-grid tetrode for controlled RF or IF voltage amplification, permitting smooth receiver gain control over an extended grid-bias range.

Base

—

Socket code

—

Sections

1

Heater

1 V / 46 mA

μ

1.3

Russian directly heated electrometric tetrode for very-low-current measurements.

Base

—

Socket code

B4

Sections

1

Heater

2 V / 150 mA

Plate

150 V

rP

300,000 Ω

gm

1.1 mA/V

4 pins - B4 - European 4-pin base

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

4K

Socket code

UX4

Sections

1

Heater

3.3 V / 132 mA

Plate

135 V

Screen

67.5 V

rP

600,000 Ω

gm

0.48 mA/V

4 pins - UX4 - Medium-shell UX 4-contact

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

B4

Sections

1

Heater

2 V / 200 mA

Plate

150 V

rP

200,000 Ω

gm

1.6 mA/V

μ

320

4 pins - B4 - European 4-pin base

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

B4

Sections

1

Heater

2 V / 200 mA

Plate

150 V

rP

400,000 Ω

gm

1.6 mA/V

4 pins - B4 - European 4-pin base

Variable-mu or remote-cutoff screen-grid tetrode for controlled RF or IF voltage amplification, permitting smooth receiver gain control over an extended grid-bias range.

Base

—

Socket code

B4

Sections

1

Heater

2 V / 200 mA

Plate

150 V

rP

110,000 Ω

gm

1.6 mA/V

4 pins - B4 - European 4-pin base

Variable-mu or remote-cutoff screen-grid tetrode for controlled RF or IF voltage amplification, permitting smooth receiver gain control over an extended grid-bias range.

Base

—

Socket code

UX5

Sections

1

Heater

2.5 V / 1.75 A

Plate

275 V

rP

600,000 Ω

gm

1.05 mA/V

5 pins - UX5 - Small 5-contact

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

MEDIUM5

Sections

1

Heater

2 V / 1.6 A

Plate

180 V

Screen

67.5 V

rP

110,000 Ω

gm

0.78 mA/V

5 pins - MEDIUM5 - Medium 5-contact transmitting-tube base

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

MEDIUM4BAYONET

Sections

1

Heater

3.3 V / 100 mA

Plate

180 V

Screen

67.5 V

rP

325,000 Ω

gm

0.51 mA/V

4 pins - MEDIUM4BAYONET - Medium 4-contact bayonet base

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

5E

Socket code

UX5

Sections

1

Heater

2.5 V / 1.75 A

Plate

250 V

Screen

90 V

rP

600,000 Ω

gm

1.025 mA/V

5 pins - UX5 - Small 5-contact

Indirectly heated screen-grid tetrode chiefly intended for high-frequency receiver amplification, with manufacturer documentation also supporting detector and audio-frequency voltage-amplifier service.

Base

—

Socket code

UX5

Sections

1

Heater

2.5 V / 1.75 A

rP

600,000 Ω

gm

1 mA/V

5 pins - UX5 - Small 5-contact

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

MEDIUM5

Sections

1

Heater

2 V / 1.6 A

Plate

250 V

Screen

90 V

rP

400,000 Ω

gm

1.38 mA/V

μ

550

5 pins - MEDIUM5 - Medium 5-contact transmitting-tube base

Western Electric screen-grid tetrode for high-frequency or audio-frequency voltage amplification and detector service, providing high voltage gain per stage.

Base

—

Socket code

MEDIUM4BAYONET

Sections

1

Heater

2 V / 1.6 A

Plate

250 V

Screen

90 V

rP

400,000 Ω

gm

1.38 mA/V

μ

550

4 pins - MEDIUM4BAYONET - Medium 4-contact bayonet base

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

MEDIUM5

Sections

1

Heater

2 V / 1.6 A

Plate

250 V

Screen

75 V

Ik max

6 mA

rP

700,000 Ω

gm

1.4 mA/V

μ

980

5 pins - MEDIUM5 - Medium 5-contact transmitting-tube base

Western Electric variable-mu screen-grid tetrode for controlled high-frequency and audio-frequency voltage amplification, using extended cutoff for receiver gain regulation.

Base

7EW

Socket code

B7G

Sections

1

Heater

2.4 V / 600 mA

Plate

180 V / 2 W

Screen

180 V / 0.5 W

Ik max

20 mA

rP

125,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

VHF tetrode designed as the RF amplifier in television tuners, providing high-frequency gain with controlled cutoff characteristics for front-end receiver service.

Base

—

Socket code

B7G

Sections

1

Heater

2.4 V / 600 mA

Plate

250 V / 3.25 W

Screen

150 V / 0.5 W

Ik max

20 mA

rP

150,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

Sharp-cutoff screen-grid tetrode intended primarily for RF voltage amplification, providing high gain with comparatively abrupt cutoff characteristics.

Base

—

Socket code

B7G

Sections

1

Heater

2.4 V / 600 mA

Plate

275 V / 3.25 W

Screen

180 V / 0.2 W

Ik max

20 mA

rP

150,000 Ω

gm

8.8 mA/V

7 pins - B7G - Miniature 7-contact

VHF tetrode designed as the RF amplifier in television tuners, providing high-frequency gain with controlled cutoff characteristics for front-end receiver service.

Base

—

Socket code

B7G

Sections

1

Heater

2.4 V / 600 mA

Plate

250 V / 4.5 W

Screen

180 V / 0.5 W

Ik max

20 mA

rP

100,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

VHF tetrode designed as the RF amplifier in television tuners, providing high-frequency gain with controlled cutoff characteristics for front-end receiver service.

Base

—

Socket code

—

Sections

1

Heater

1.2 V / 29 mA

Plate

10 V

Directly heated oxide-cathode electrometer tetrode intended for precision measuring applications requiring extremely small currents and sensitive DC signal amplification.

Base

B9A

Socket code

B9A

Sections

1

Heater

37 V / 300 mA

Plate

250 V / 2.5 W

Screen

230 V / 0.4 W

Ik max

18 mA

gm

15 mA/V

μ

60

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

Variable-mu frame-grid VHF tetrode designed for television turret-tuner RF amplification, combining high-frequency gain with controlled cutoff for receiver gain regulation.

Base

4K

Socket code

UX4

Sections

1

Heater

2 V / 60 mA

Plate

180 V

Screen

67.5 V

rP

1,200,000 Ω

gm

0.64 mA/V

μ

780

4 pins - UX4 - Medium-shell UX 4-contact

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

UX4

Sections

1

Heater

6.3 V / 950 mA

Plate

180 V / 15 W

Screen

67.5 V

gm

0.5 mA/V

4 pins - UX4 - Medium-shell UX 4-contact

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

—

Socket code

—

Sections

1

Heater

2 V / 60 mA

Plate

180 V

Screen

67.5 V

gm

0.78 mA/V

4 pins

Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.

Base

5E

Socket code

UX5

Sections

1

Heater

2.5 V / 1.75 A

Plate

250 V

Screen

90 V

rP

400,000 Ω

gm

1.05 mA/V

μ

420

5 pins - UX5 - Small 5-contact

Variable-mu or remote-cutoff screen-grid tetrode for controlled RF or IF voltage amplification, permitting smooth receiver gain control over an extended grid-bias range.

Base

5E

Socket code

UX5

Sections

1

Heater

6.3 V / 300 mA

Plate

180 V

Screen

90 V

rP

550,000 Ω

gm

1.08 mA/V

μ

595

5 pins - UX5 - Small 5-contact

Sharp-cutoff screen-grid tetrode intended primarily for RF voltage amplification, providing high gain with comparatively abrupt cutoff characteristics.

Base

7EW

Socket code

B7G

Sections

1

Heater

2.9 V / 600 mA

Plate

180 V / 2 W

Screen

180 V / 0.5 W

Ik max

20 mA

rP

125,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

VHF tetrode designed as the RF amplifier in television tuners, providing high-frequency gain with controlled cutoff characteristics for front-end receiver service.

Base

—

Socket code

B7G

Sections

1

Heater

2.9 V / 450 mA

Plate

250 V / 3.25 W

Screen

150 V / 0.5 W

Ik max

20 mA

rP

150,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

Sharp-cutoff tetrode for high-plate-voltage RF amplification in VHF television tuners. Its high output resistance and controlled cutoff suit low-level tuner front ends.

Base

—

Socket code

B7G

Sections

1

Heater

2.9 V / 450 mA

Plate

275 V / 3.25 W

Screen

180 V / 0.2 W

Ik max

20 mA

rP

150,000 Ω

gm

8.8 mA/V

7 pins - B7G - Miniature 7-contact

High-gain sharp-cutoff tetrode for low-noise VHF television tuner service. Its design emphasizes sensitive RF amplification ahead of the converter stage.

Base

—

Socket code

B8D

Sections

1

Heater

1.25 V / 13 mA

Plate

10 V

Ik max

0.3 mA

gm

0.017 mA/V

8 pins - B8D - Subminiature 8-lead

Directly heated subminiature electrometer tetrode for very-low-current measurement. Extremely low filament power and high input resistance suit sensitive instrumentation.

Base

—

Socket code

B9A

Sections

1

Heater

6.3 V / 300 mA

Plate

190 V / 3 W

Screen

160 V / 0.75 W

Ik max

36 mA

rP

13,000 Ω

gm

15.5 mA/V

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

High figure-of-merit amplifier tetrode for high-frequency signal amplification. Its construction emphasizes useful gain and performance at elevated radio frequencies.

Base

—

Socket code

B9A

Sections

1

Heater

6.3 V / 450 mA

Plate

190 V / 4.5 W

Screen

160 V / 2 W

Ik max

72 mA

rP

36,000 Ω

gm

3 mA/V

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

High figure-of-merit amplifier tetrode for high-frequency signal amplification. Its increased heater power supports strong performance in demanding RF circuits.

Base

—

Socket code

UX4

Sections

1

Heater

6.3 V / 450 mA

Plate

150 V / 6 W

Screen

150 V / 1.75 W

Ik max

50 mA

rP

33,000 Ω

gm

31.5 mA/V

4 pins - UX4 - Medium-shell UX 4-contact

High figure-of-merit indirectly heated tetrode developed for the Western Electric TH radio-relay system, providing high-frequency amplification in professional communications equipment.

Base

—

Socket code

UX4

Sections

1

Heater

6.3 V / 450 mA

Plate

150 V / 6 W

Screen

150 V / 1.75 W

Ik max

50 mA

rP

33,000 Ω

gm

31.5 mA/V

4 pins - UX4 - Medium-shell UX 4-contact

High figure-of-merit indirectly heated tetrode for the Western Electric TH radio-relay system, intended for professional high-frequency repeater amplification.

Base

—

Socket code

UX4

Sections

1

Heater

6.3 V / 450 mA

Plate

150 V / 6 W

Screen

150 V / 1.75 W

Ik max

50 mA

rP

33,000 Ω

gm

31.5 mA/V

4 pins - UX4 - Medium-shell UX 4-contact

High figure-of-merit indirectly heated tetrode for the Western Electric TH radio-relay system, providing specialized amplification in professional communications links.

Base

6A

Socket code

UX6

Sections

1

Heater

30 V / 400 mA

Plate

125 V

Screen

100 V

Ik max

65.5 mA

gm

3.9 mA/V

μ

15.6

6 pins - UX6 - Small 6-contact

Power-amplifier tetrode for low-voltage Class A output service. Published operating data provide about 2.5 watts output from a 125-volt plate supply.

Base

5C

Socket code

UX5

Sections

1

Heater

2 V / 120 mA

Plate

135 V

Ik max

50 mA

rP

4,175 Ω

gm

1.125 mA/V

μ

4.7

5 pins - UX5 - Small 5-contact

Directly heated dual-grid power-amplifier tube for low-power Class A output service. Its economical two-volt filament suits battery-operated receiving equipment.

Base

—

Socket code

B5

Sections

1

Heater

5 V / 1.6 A

Plate

250 V

rP

3,600 Ω

μ

5.3

5 pins - B5 - European 5-pin base

Directly heated tetrode with a heavy five-volt filament. Available source material confirms tetrode construction but does not establish a narrower functional application confidently.

Base

—

Socket code

B5

Sections

1

Heater

5 V / 1.6 A

Plate

250 V

Ik max

45 mA

rP

3,600 Ω

μ

5.3

5 pins - B5 - European 5-pin base

Directly heated coplanar-grid tetrode with a heavy five-volt filament. Available source material identifies its specialized grid geometry without establishing a narrower functional category.

Base

7FT

Socket code

B7G

Sections

1

Heater

4.5 V / 300 mA

Plate

180 V / 3 W

Screen

180 V / 0.5 W

Ik max

40 mA

rP

100,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

Sharp-cutoff tetrode for VHF television-tuner RF amplification. Its high-frequency characteristics suit sensitive front-end amplification in television receivers.

Base

—

Socket code

—

Sections

1

Heater

1.25 V / 26 mA

Plate

12 V

Directly heated electrometer tetrode intended for very-low-current measurement. Its low-power filament and high input resistance suit sensitive instrumentation circuits.

Base

5E

Socket code

UX5

Sections

1

Heater

2.5 V / 1.75 A

Plate

275 V

Screen

90 V

rP

400,000 Ω

gm

1.05 mA/V

5 pins - UX5 - Small 5-contact

Tetrode documented in Raytheon receiving-tube sources. Available manufacturer material in the current record does not establish a narrower functional application confidently enough for recategorization.

Base

—

Socket code

U7B

Sections

1

Heater

6.3 V / 300 mA

Plate

180 V

5 pins - U7B - Medium 7-contact

Directly heated tetrode documented in Raytheon receiving-tube sources. Available material confirms tetrode construction but does not establish a narrower functional role confidently.

Base

—

Socket code

B9A

Sections

1

Heater

1.25 V / 10 mA

Plate

25 V

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

Subminiature low-filament-power tetrode designed as an electrometer amplifier. Very high input resistance and tiny heater demand suit sensitive portable instrumentation.

Base

—

Socket code

B9A

Sections

1

Heater

2.56 V / 45 mA

Plate

9 V

gm

0.04 mA/V

μ

1.8

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

Directly heated space-charge-grid electrometer tetrode for extremely high input-resistance measurement circuits. Its specialized grid arrangement supports very-low-current instrumentation.

Base

7EW

Socket code

B7G

Sections

1

Heater

6.3 V / 200 mA

Plate

180 V / 2 W

Screen

180 V / 0.5 W

Ik max

20 mA

rP

100,000 Ω

gm

8 mA/V

7 pins - B7G - Miniature 7-contact

Sharp-cutoff tetrode for VHF television-tuner RF amplification. Its high output resistance and controlled cutoff suit sensitive tuner front ends.

Base

—

Socket code

—

Sections

1

7 pins

Ericsson long-life seven-pin sharp-cutoff RF tetrode developed for dependable amplification in cable-television (CATV) distribution equipment, with rugged miniature construction and shielded interelectrode capacitances.

Base

—

Socket code

B9A

Sections

1

Heater

6.3 V / 625 mA

Plate

5,000 V / 10 W

Screen

60 V / 0.15 W

gm

0.7 mA/V

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

Russian high-voltage tetrode designed for specialized high-voltage electronic service. Available translated source material supports the high-voltage role without a more specific functional assignment.

Base

—

Socket code

B9A

Sections

1

Heater

6.3 V / 610 mA

Plate

250 V

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

Russian tetrode of the 6E5P family. Available manufacturer material confirms tetrode construction and substantial operating capability but does not support a narrower functional category confidently.