Electronic tube and vacuum tube catalog

Base

—

Socket code

IO

Sections

1

Heater

10 V / 640 mA

Plate

250 V / 8 W

gm

2.85 mA/V

μ

95

5 pins - IO - International Octal

Russian output pentode designed for low-frequency power amplification in long-distance wire-communication equipment. Manufacturer documentation identifies audio-frequency power delivery as its primary function.

Base

7F

Socket code

U7A

Sections

1

Heater

12.6 V / 300 mA

Plate

180 V / 8.25 W

Screen

180 V / 2.5 W

rP

50,000 Ω

gm

1.7 mA/V

μ

85

7 pins - U7A - Small 7-contact

Dual-purpose power pentode intended for power-amplifier service and capable of series or parallel heater operation. Its flexible heater arrangement supports output-stage use across different receiver supply configurations.

Base

Refer to variations

Socket code

B7G

Sections

1

Heater

12.6 V / 600 mA

Plate

150 V / 5.5 W

Screen

130 V / 2 W

rP

11,000 Ω

gm

14.6 mA/V

7 pins - B7G - Miniature 7-contact

High-perveance miniature power pentode designed for audio-output service, offering high power sensitivity and several watts of Class-A output from comparatively low supply voltage.

Base

7CV

Socket code

B7G

Sections

1

Heater

12.6 V / 450 mA

Plate

150 V / 5.5 W

Screen

130 V / 2 W

Ik max

50 mA

rP

17,000 Ω

gm

13.5 mA/V

7 pins - B7G - Miniature 7-contact

Miniature beam-power pentode designed for audio-amplifier output stages, emphasizing high power sensitivity for record players and other low-voltage consumer equipment.

Base

—

Socket code

B8G

Sections

1

Heater

12.6 V / 325 mA

Plate

250 V / 7.5 W

Screen

250 V / 2 W

Ik max

60 mA

gm

7.977 mA/V

8 pins - B8G - Loctal 8-contact

Russian oscillator pentode designed for high-frequency generation and RF power amplification to approximately 120 MHz. Its defining function is RF generation/output rather than low-frequency audio power service.

Base

—

Socket code

—

Sections

1

Heater

13 V / 150 mA

Plate

110 V / 6 W

Screen

80 V / 1 W

Output pentode designed for low-frequency power amplification. Manufacturer documentation identifies it as a dedicated audio-frequency power tube rather than a small-signal voltage amplifier.

Base

9AR

Socket code

B9A

Sections

1

Heater

15 V / 300 mA

Plate

250 V / 9 W

Screen

250 V / 2 W

rP

100,000 Ω

gm

10 mA/V

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

Video-output pentode designed for television receivers using series heater chains. Its output capability is optimized for wideband video drive rather than conventional audio-frequency power amplification.

Base

—

Socket code

UX5

Sections

1

Heater

2.5 V / 1.75 A

Plate

400 V / 6 W

Screen

200 V

gm

2.5 mA/V

5 pins - UX5 - Small 5-contact

RCA RF power pentode designed for transmitting service. Manufacturer documentation provides radio-frequency power ratings appropriate to an RF output tube rather than a receiving-type audio power pentode.

Base

7S

Socket code

IO

Sections

1

Heater

6.3 V / 700 mA

Plate

300 V / 7.9 W

Screen

300 V / 1.9 W

7 pins - IO - International Octal

Octal power pentode similar to the 6F6, with documented push-pull Class-A1 operation producing about 5 W into a 4 kΩ plate-to-plate load. Designed for audio power-output service.

Base

9BL

Socket code

B9A

Sections

1

Heater

16.5 V / 300 mA

Plate

250 V / 9 W

Screen

250 V

rP

20,000 Ω

gm

9 mA/V

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

Power-amplifier pentode with a 16.5 V heater designed for Class-A audio-output service. Its primary function is low-frequency power delivery to an output load.

Base

—

Socket code

—

Sections

1

Heater

4 V / 1.6 A

Plate

220 V / 7 W

Screen

220 V / 1 W

Ik max

50 mA

gm

8 mA/V

Long-life Philips pentode for telephone and communications equipment, with documented preamplifier and output-stage operating conditions.

Base

—

Socket code

—

Sections

1

Heater

21 V / 335 mA

Plate

150 V / 5.6 W

Screen

150 V / 1.2 W

Ik max

70 mA

gm

9 mA/V

Long-life Philips pentode for telephone equipment, supporting professional preamplifier and output-amplifier service.

Base

—

Socket code

B8G

Sections

1

Heater

18 V / 200 mA

Plate

250 V / 4.5 W

Screen

250 V / 1.2 W

Ik max

30 mA

gm

11 mA/V

μ

37

8 pins - B8G - Loctal 8-contact

Special-quality long-life Philips pentode for telephone equipment, usable as either preamplifier or output valve.

Base

—

Socket code

B9A

Sections

1

Heater

18 V / 130 mA

Plate

210 V / 4.5 W

Screen

210 V / 1.2 W

Ik max

30 mA

gm

11 mA/V

μ

36

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

Long-life Philips output pentode for telephone and communications equipment, documented for service exceeding 10,000 hours.

Base

—

Socket code

B9A

Sections

1

Heater

20 V / 135 mA

Plate

550 V / 4.5 W

Screen

550 V / 1.2 W

Ik max

30 mA

rP

300,000 Ω

gm

11 mA/V

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

Steep-slope long-life output pentode for long-distance communications equipment, also designated EL861.

Base

7CV

Socket code

B7G

Sections

1

Heater

18.9 V / 300 mA

Plate

150 V / 5.5 W

Screen

130 V / 2 W

Ik max

50 mA

rP

17,500 Ω

gm

13.5 mA/V

7 pins - B7G - Miniature 7-contact

Miniature high-transconductance power pentode for low-voltage audio-amplifier output stages.

Base

E9-1

Socket code

B9A

Sections

1

Heater

19 V / 200 mA

Plate

275 V / 8.2 W

Screen

165 V / 1.9 W

Ik max

55 mA

rP

25,000 Ω

gm

5.5 mA/V

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

Long-life power pentode for professional wire-communications power-amplifier service.

Base

—

Socket code

—

Sections

1

Heater

2 V / 240 mA

5 pins

Directly heated power amplifier pentode; low-power classification provisional pending dissipation rating.

Base

5K

Socket code

UX5

Sections

1

Heater

2 V / 120 mA

Plate

180 V / 1.75 W

Screen

180 V / 0.75 W

Ik max

11 mA

rP

200,000 Ω

gm

1.7 mA/V

μ

340

5 pins - UX5 - Small 5-contact

Directly heated power pentode for Class-A audio output in battery receivers using a 2 V filament.

Base

G-6X

Socket code

IO

Sections

1

Heater

2 V / 120 mA

Plate

180 V / 1.75 W

Screen

180 V / 0.75 W

rP

200,000 Ω

gm

1.7 mA/V

7 pins - IO - International Octal

Directly heated battery power pentode providing roughly 0.3 W Class-A audio output for portable and farm radios.

Base

6X-O-O

Socket code

IO

Sections

1

Heater

2 V / 120 mA

Plate

135 V / 1.25 W

Screen

135 V / 0.6 W

rP

160,000 Ω

gm

1.55 mA/V

μ

200

7 pins - IO - International Octal

Directly heated power pentode for battery receiver output, providing approximately 0.3 W Class-A loudspeaker power.

Base

—

Socket code

B7G

Sections

1

Heater

1.2 V / 60 mA

Plate

90 V / 0.7 W

Screen

67.5 V / 0.2 W

Ik max

12 mA

gm

1.4 mA/V

7 pins - B7G - Miniature 7-contact

Tesla directly heated battery output pentode producing about 230 mW Class-A audio power with an economical 1.2 V filament.

Base

—

Socket code

—

Sections

1

Heater

1.2 V / 233 mA

gm

2.8 mA/V

Base

—

Socket code

—

Sections

1

Heater

1.2 V / 190 mA

gm

2.8 mA/V

Base

—

Socket code

—

Sections

1

Heater

1.25 V / 50 mA

gm

0.5 mA/V

Base

—

Socket code

—

Sections

1

Heater

1.25 V / 28 mA

gm

0.42 mA/V

Base

—

Socket code

—

Sections

1

Heater

1.25 V / 20 mA

gm

0.39 mA/V

Base

7S

Socket code

IO

Sections

1

Heater

25 V / 300 mA

Plate

180 V / 4.3 W

Screen

135 V / 1.9 W

rP

42,000 Ω

gm

2.375 mA/V

μ

90

7 pins - IO - International Octal

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

IO

Sections

1

Heater

25 V / 300 mA

Plate

180 V / 4.3 W

Screen

135 V / 1.9 W

rP

42,000 Ω

gm

2.375 mA/V

μ

90

7 pins - IO - International Octal

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

7S

Socket code

IO

Sections

1

Heater

25 V / 300 mA

Plate

180 V / 4.3 W

Screen

135 V / 1.9 W

rP

42,000 Ω

gm

2.375 mA/V

7 pins - IO - International Octal

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

MEDIUM6

Sections

1

Heater

10 V / 320 mA

Plate

250 V / 5 W

Screen

200 V / 1 W

Ik max

30 mA

rP

100,000 Ω

gm

1.175 mA/V

6 pins - MEDIUM6 - Medium 6-contact base

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

2E35

Socket code

Refer to variations

Sections

1

Heater

1.25 V / 50 mA

Plate

90 V / 0.25 W

Screen

90 V

Ik max

10 mA

rP

250,000 Ω

gm

0.5 mA/V

5 pins

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

2E35

Socket code

—

Sections

1

Heater

1.25 V / 30 mA

Plate

45 V / 0.15 W

Screen

45 V

Ik max

5 mA

rP

250,000 Ω

gm

0.5 mA/V

5 pins

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

—

Sections

1

Heater

2.2 V / 70 mA

Low-power directly heated RF oscillator and power-amplifier pentode.

Base

—

Socket code

—

Sections

1

Heater

2.2 V / 123 mA

Low-power directly heated HF oscillator and power-amplifier pentode.

Base

E7-1

Socket code

B7G

Sections

1

Heater

30 V / 150 mA

Plate

150 V / 7.5 W

Screen

150 V / 1.5 W

Ik max

100 mA

rP

22,000 Ω

gm

9.2 mA/V

7 pins - B7G - Miniature 7-contact

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

UX5

Sections

1

Heater

10 V / 640 mA

Plate

180 V / 9 W

Screen

150 V / 1.8 W

Ik max

60 mA

rP

50,000 Ω

gm

2.9 mA/V

μ

146

5 pins - UX5 - Small 5-contact

Power pentode designed for both audio/output amplification and radio-frequency power-amplifier service.

Base

—

Socket code

UX4

Sections

1

Heater

9 V / 600 mA

Plate

200 V / 9 W

Screen

150 V / 1.8 W

Ik max

60 mA

gm

2.8 mA/V

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

Power pentode designed for both audio/output amplification and radio-frequency power-amplifier service.

Base

—

Socket code

UX5

Sections

1

Heater

7.5 V / 850 mA

Plate

180 V / 9 W

Screen

150 V / 1.8 W

Ik max

60 mA

rP

50,000 Ω

gm

2.9 mA/V

μ

146

5 pins - UX5 - Small 5-contact

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

7-pin miniature

Socket code

B7G

Sections

1

Heater

35 V / 150 mA

Plate

150 V / 5.5 W

Screen

130 V / 1 W

Ik max

100 mA

rP

12,000 Ω

gm

7.5 mA/V

7 pins - B7G - Miniature 7-contact

Power pentode designed for audio-frequency output service with a 35 V, 150 mA heater. Manufacturer data provide ratings, characteristics, and typical operating conditions for receiver audio power stages.

Base

—

Socket code

—

Sections

1

Heater

3 V / 830 mA

Plate

150 V / 4.8 W

Screen

150 V / 1 W

rP

60,000 Ω

gm

3.4 mA/V

μ

210

7 pins

Western Electric oxide-filament power pentode with published Class-A output characteristics. Its directly heated construction provides low-frequency power amplification from a filamentary cathode.

Base

B8-11

Socket code

IO

Sections

1

Heater

6.5 V / 500 mA

Plate

150 V / 8 W

Screen

150 V / 2 W

Ik max

75 mA

rP

17,000 Ω

gm

5.4 mA/V

μ

92

8 pins - IO - International Octal

Western Electric 5603/398A filamentary power pentode amplifier with design-center ratings and documented power-amplifier operating conditions. Its directly heated construction is intended for output-stage service.

Base

7B8

Socket code

B7G

Sections

1

Heater

1.4 V / 200 mA

Plate

150 V / 2 W

Screen

135 V / 0.9 W

Ik max

25 mA

rP

90,000 Ω

gm

1.9 mA/V

μ

190

7 pins - B7G - Miniature 7-contact

Directly heated power pentode for oscillator, Class-A audio, or Class-C RF power service. Series/parallel filament operation supports portable equipment, with documented output around one watt under suitable conditions.

Base

7CY

Socket code

B7G

Sections

1

Heater

1.25 V / 330 mA

Plate

150 V / 3 W

Screen

135 V

Ik max

25 mA

gm

1.7 mA/V

μ

4.1

7 pins - B7G - Miniature 7-contact

Directly heated instant-start beam-power pentode for portable or mobile RF amplification, oscillation, and frequency multiplication, capable of Class-C output around 100 MHz.

Base

6BX

Socket code

Refer to variations

Sections

1

Heater

1.4 V / 50 mA

Plate

90 V / 0.6 W

Screen

90 V / 0.2 W

gm

1.4 mA/V

6 pins

Low-voltage directly heated power pentode designed for Class-A audio output. Its filamentary cathode and modest supply requirements suit battery-operated low-frequency power amplifiers.

Base

—

Socket code

B7G

Sections

1

Heater

2.8 V / 50 mA

Plate

150 V / 2 W

Screen

90 V / 0.4 W

gm

2.1 mA/V

7 pins - B7G - Miniature 7-contact

Output pentode designed for both Class-A audio and RF power amplification. Manufacturer documentation identifies genuine output-stage service across low-frequency and radio-frequency applications.

Base

—

Socket code

B7G

Sections

1

Heater

2.8 V / 50 mA

Plate

150 V / 2 W

B7G - Miniature 7-contact

Directly heated pentode for Class-A output and Class-C high-frequency power amplification, with suppressor-grid modulation capability. Its construction supports both audio output and modulated RF power service.

Base

7BA

Socket code

B7G

Sections

1

Heater

2.8 V / 50 mA

Plate

90 V / 1 W

Screen

90 V

Ik max

12 mA

rP

100,000 Ω

gm

2.15 mA/V

7 pins - B7G - Miniature 7-contact

Directly heated output pentode, co-designated DL95, designed for low-frequency power amplification. Its filamentary construction suits battery-operated receiver audio-output stages.

Base

7BA

Socket code

B7G

Sections

1

Heater

2.8 V / 50 mA

Plate

90 V / 1 W

Screen

67.5 V

Ik max

5.5 mA

rP

100,000 Ω

gm

1.575 mA/V

7 pins - B7G - Miniature 7-contact

Directly heated output pentode, co-designated DL92, designed for low-frequency power amplification. Its low-power filament makes it suitable for portable battery receiver output stages.

Base

6BX

Socket code

B7G

Sections

1

Heater

2.8 V / 50 mA

Plate

90 V / 1 W

Screen

90 V

Ik max

12 mA

rP

100,000 Ω

gm

2.15 mA/V

7 pins - B7G - Miniature 7-contact

Directly heated miniature power-output pentode for battery-operated audio amplifiers. Its low filament demand and compact construction provide useful low-frequency output power in portable equipment.