Electronic tube and vacuum tube catalog

Base

—

Socket code

—

Electrical Summary

Heater	22 V / 100 mA
Plate	250 V / 1.6 W
Screen	250 V / 0.4 W
gm	6.5 mA/V

Sections

1

Ediswan/Mazda pentode documented for signal amplification service. The available manufacturer sheet supplies its electrical characteristics and operating information, but does not provide sufficiently explicit functional wording here to justify a narrower specialized classification.

Base

—

Socket code

IO

Electrical Summary

Heater	10 V / 320 mA
Plate	250 V / 1.9 W
Screen	180 V / 0.4 W
gm	1.85 mA/V

Sections

1

8 pins - IO - International Octal

Russian high-frequency voltage-amplifier pentode designed for long-distance wire communication systems. Manufacturer data specify a 1,000-hour guaranteed service life and operating characteristics for high-frequency signal amplification in communications equipment.

Base

—

Socket code

B9A

Electrical Summary

Heater	12.6 V / 150 mA
Plate	250 V / 2.5 W
Screen	250 V / 0.7 W
Ik max	15 mA
rP	650,000 Ω
gm	6.8 mA/V

Sections

1

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

Nine-pin miniature pentode designed for RF, IF, video-amplifier, or mixer service in television receivers. Its broad high-frequency signal role makes it a versatile television front-end and wideband amplification tube rather than a power-output device.

Base

—

Socket code

IO

Electrical Summary

Heater	12.6 V / 150 mA
Plate	330 V / 3.3 W
Screen	220 V / 0.7 W
gm	4.7 mA/V

Sections

1

8 pins - IO - International Octal

Russian high-frequency pentode with a tailored characteristic, designed for amplification of high-frequency voltage. Its manufacturer description places it firmly in RF voltage-amplifier service rather than power-output operation.

Base

—

Socket code

IO

Electrical Summary

Heater	12.6 V / 150 mA
Plate	330 V / 2.8 W
Screen	140 V / 0.7 W
gm	1.65 mA/V

Sections

1

8 pins - IO - International Octal

Russian high-frequency pentode with a short characteristic, designed for high-frequency voltage amplification. Manufacturer documentation specifies a 2,000-hour service-life guarantee and electrical characteristics for RF signal-amplifier operation.

Base

—

Socket code

—

Electrical Summary

Heater	13.3 V / 295 mA
Plate	100 V
Screen	100 V
Ik max	3.2 mA
rP	500,000 Ω
gm	4.1 mA/V

Sections

1

High-frequency voltage-amplifier pentode designed for long-distance cable-telephone underwater equipment. Its specialized communications role emphasizes reliable RF or carrier-frequency signal amplification in submerged repeater systems.

Base

—

Socket code

—

Electrical Summary

Heater	13.3 V / 295 mA
Plate	100 V
Screen	100 V
Ik max	7.5 mA
gm	6.7 mA/V

Sections

1

Pentode designed for underwater amplifier equipment and high-frequency voltage amplification. Manufacturer documentation identifies it as a specialized communications signal tube for submerged cable systems rather than a general-purpose or power-output pentode.

Base

—

Socket code

B7

Electrical Summary

Heater	13 V / 200 mA
Plate	200 V
Screen	100 V
gm	2.5 mA/V

Sections

1

7 pins - B7 - Medium 7-contact

Indirectly heated high-frequency pentode intended for HF amplification or detector service. Cossor documentation identifies it as a radio-frequency signal tube capable of both amplification and detection in receiving equipment.

Base

—

Socket code

IO

Electrical Summary

Heater	18 V / 165 mA
Plate	250 V / 4 W
Screen	250 V / 0.45 W
Ik max	20 mA
gm	10 mA/V

Sections

1

8 pins - IO - International Octal

High-slope RF pentode designed for RF, IF, and wideband amplifier service. Tesla documentation identifies it as a high-frequency signal-amplification tube suited to circuits requiring substantial transconductance and broad bandwidth.

Base

—

Socket code

—

Electrical Summary

Heater	2 V / 60 mA
Plate	180 V
Screen	67.5 V
Ik max	3 mA
rP	1,500,000 Ω
gm	0.65 mA/V
μ	975

Sections

1

5 pins

Directly heated high-frequency amplifier pentode, explicitly co-designated 1B4/951 in RCA documentation. It is intended for RF signal amplification and uses a filamentary cathode suited to low-voltage supply operation.

Base

—

Socket code

—

Electrical Summary

Heater	2 V / 60 mA
Plate	180 V
Screen	67.5 V
rP	1,000,000 Ω
gm	0.6 mA/V
μ	600

Sections

1

Directly heated high-frequency RF amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 60 mA
Plate	150 V / 1.2 W
Screen	120 V / 0.35 W
Ik max	8 mA

Sections

1

Ruggedized Russian high-frequency pentode designed for voltage amplification. Its strengthened construction supports RF signal service under demanding mechanical conditions while retaining the compact form of a miniature directly heated pentode.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 62 mA
Plate	150 V / 1.2 W
Screen	120 V / 0.35 W
Ik max	8 mA

Sections

1

Ruggedized Russian high-frequency pentode designed for voltage amplification. Manufacturer documentation emphasizes strengthened construction for RF signal service where resistance to demanding mechanical or environmental conditions is required.

Base

—

Socket code

—

Electrical Summary

Heater	1.35 V / 74 mA
Plate	200 V / 1.5 W
Screen	60 V
Ik max	7 mA

Sections

1

Shock-resistant Russian high-frequency pentode designed for voltage amplification. Its mechanically robust construction makes it suitable for RF signal equipment exposed to vibration or shock rather than ordinary stationary receiver service.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 60 mA
gm	0.89 mA/V

Sections

1

7 pins

Russian directly heated miniature pentode for high-frequency voltage amplification in battery-operated receivers. Its oxide-coated 1.2 V, 60 mA filament supports low-voltage RF amplification with nominal transconductance of 0.89 mA/V.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 125 mA
gm	3 mA/V

Sections

1

Russian directly heated, high-durability miniature pentode for high-frequency oscillation and amplification. The 1.2 V, 125 mA oxide-coated filament and flexible leads support compact RF equipment.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 125 mA
gm	3 mA/V

Sections

1

Russian high-durability, directly heated miniature RF pentode for high-frequency oscillation and amplification. The 1P22BV uses a 1.2 V, 125 mA oxide-coated filament and flexible leads; its datasheet specifies microphonic characteristics.

Base

—

Socket code

—

Electrical Summary

Heater	1.35 V / 223 mA
gm	2.8 mA/V

Sections

1

Russian shock-resistant directly heated miniature pentode intended for high-frequency oscillation. A 1.35 V, 223 mA oxide-coated filament and flexible lead connections suit equipment exposed to mechanical stress.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 120 mA
gm	1.4 mA/V

Sections

1

Russian high-durability miniature pentode for HF oscillation and amplification. Uses a directly heated oxide-coated filament rated 1.2 V, 120 mA, and flexible leads.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 45 mA
gm	1.5 mA/V

Sections

1

Directly heated miniature HF voltage-amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 24 mA
gm	0.835 mA/V

Sections

1

Directly heated miniature HF voltage-amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 13 mA
gm	0.48 mA/V

Sections

1

Directly heated miniature HF voltage-amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V
Plate	1.2 W
gm	1.2 mA/V

Sections

1

Directly heated miniature HF oscillator/amplifier pentode; series/parallel filament.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V
gm	1.2 mA/V

Sections

1

Ruggedized directly heated HF pentode; series/parallel filament.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V
gm	1.2 mA/V

Sections

1

Directly heated HF voltage pentode; series/parallel filament.

Base

—

Socket code

—

Electrical Summary

Heater	1.35 V / 74 mA
gm	2 mA/V

Sections

1

Rugged directly heated HF voltage pentode.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 185 mA
gm	3.3 mA/V

Sections

1

Rugged directly heated high-frequency amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	2.2 V / 30 mA

Sections

1

Miniature directly heated high-frequency voltage amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	2.2 V / 14 mA

Sections

1

Miniature directly heated high-frequency voltage amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	2.2 V / 57 mA

Sections

1

Miniature directly heated high-frequency voltage amplifier pentode.

Base

—

Socket code

—

Electrical Summary

Heater	2.4 V / 140 mA
gm	4.5 mA/V

Sections

1

Base

—

Socket code

B7G

Electrical Summary

Heater	3.4 V / 600 mA
Plate	290 V / 2.5 W
Screen	250 V / 0.7 W
Ik max	15 mA
rP	500,000 Ω
gm	7.4 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Controlled-warm-up high-transconductance pentode developed for RF and IF amplifier service in sensitive high-frequency receiver stages.

Base

—

Socket code

B7G

Electrical Summary

Heater	6.3 V / 175 mA
Plate	180 V / 1.7 W
Screen	140 V / 0.5 W
Ik max	18 mA
rP	300,000 Ω
gm	5 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Western Electric miniature pentode designed for high- and ultra-high-frequency amplification, combining useful gain with compact low-capacitance construction.

Base

—

Socket code

B7G

Electrical Summary

Heater	6.3 V / 150 mA
Plate	180 V / 1.7 W
Screen	140 V / 0.75 W
Ik max	18 mA
gm	1.85 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Western Electric UHF suppressor-grid pentode with independent suppressor control for gating, modulation, mixing, and specialized high-frequency circuits.

Base

—

Socket code

UX6

Electrical Summary

Heater	7.5 V / 425 mA
Plate	250 V
Screen	180 V
Ik max	7.5 mA
gm	2 mA/V

Sections

1

6 pins - UX6 - Small 6-contact

Professional carrier-frequency pentode for telecommunications amplification, featuring top-cap control grid and detailed high-frequency capacitance specifications.

Base

WITHOUTBASE-MV

Socket code

—

Electrical Summary

Heater	6.3 V / 150 mA
Plate	250 V / 0.8 W
Screen	100 V / 0.15 W
Ik max	5 mA
rP	3,500,000 Ω
gm	1.4 mA/V
μ	5,000

Sections

1

Compact acorn pentode for high- and low-frequency amplification and detector service, using low capacitances for high-frequency receiver applications.

Base

P30-VIII

Socket code

—

Electrical Summary

Heater	4 V / 150 mA
Plate	250 V / 2.5 W
Screen	200 V / 0.4 W
Ik max	15 mA
rP	1,500,000 Ω
gm	5 mA/V

Sections

1

High-transconductance pentode developed for high-frequency and television amplification, with published operating conditions for wideband video service.

Base

WITHOUTBASE-MV

Socket code

—

Electrical Summary

Heater	6.3 V / 150 mA
Plate	250 V / 1.5 W
Screen	125 V / 0.5 W
Ik max	10 mA
rP	800,000 Ω
gm	1.8 mA/V

Sections

1

Acorn pentode developed for high-frequency voltage amplification, combining compact low-capacitance construction with high plate resistance.

Base

—

Socket code

—

Electrical Summary

Heater	4.2 V / 225 mA
gm	1.7 mA/V

Sections

1

Russian indirectly heated screened RF pentode for high-frequency voltage and power amplification and oscillation up to approximately 200 MHz. Nominal heater 4.2 V, 225 mA; published transconductance 1.7 mA/V.

Base

E7-1

Socket code

B7G

Electrical Summary

Heater	6.3 V / 150 mA
Plate	200 V / 1.85 W
Screen	155 V / 0.5 W
rP	350,000 Ω
gm	5.1 mA/V
μ	28

Sections

1

7 pins - B7G - Miniature 7-contact

Long-life low-noise RF and broadband pentode developed for professional high-frequency amplifier service and replacement of 5654/6AK5-class types.

Base

5702

Socket code

SUBMINIATURE7

Electrical Summary

Heater	6.3 V / 200 mA
Plate	180 V
Screen	140 V
rP	340,000 Ω
gm	5 mA/V

Sections

1

7 pins - SUBMINIATURE7 - Subminiature 7-lead base

Subminiature RF pentode intended for Class A signal amplification. Its compact construction suits high-frequency voltage-amplifier stages where miniature size is important, with manufacturer data providing the corresponding Class A operating characteristics.

Base

—

Socket code

B5

Electrical Summary

Heater	4 V / 1 A
Plate	250 V
Screen	100 V
Ik max	9 mA
rP	800,000 Ω

Sections

1

5 pins - B5 - European 5-pin base

RF pentode documented by Standard Valves for high-frequency signal amplification. Its manufacturer classification establishes radio-frequency amplifier service rather than power output, although the surviving description does not justify a narrower cutoff classification.

Base

—

Socket code

M7A

Electrical Summary

Heater	10 V / 800 mA
Plate	500 V / 30 W
Screen	300 V / 6 W
Ik max	60 mA
gm	6 mA/V

Sections

1

7 pins - M7A - British/European 7-pin

RF pentode documented by Standard Valves for high-frequency signal service. Manufacturer data include electrode and capacitance information, identifying it as an RF amplifier tube rather than a power-output pentode.

Base

—

Socket code

M7A

Electrical Summary

Heater	10 V / 800 mA
Plate	500 V / 30 W
Screen	300 V / 6 W
Ik max	60 mA
gm	6 mA/V

Sections

1

7 pins - M7A - British/European 7-pin

RF pentode documented by Standard Valves for high-frequency signal service. Published electrode and capacitance data establish its role as an RF signal-amplifier device rather than an output-stage power tube.

Base

9BC

Socket code

B9A

Electrical Summary

Heater	6.3 V / 150 mA
Plate	250 V / 2.05 W
Screen	125 V / 0.7 W
rP	2,500,000 Ω
gm	1.95 mA/V

Sections

1

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

Low-microphony high-frequency pentode designed for signal amplification where mechanical vibration must produce minimal electrical disturbance. Its manufacturer registration emphasizes reduced microphonic response as a distinguishing characteristic for sensitive HF circuits.

Base

7EB

Socket code

B7G

Electrical Summary

Heater	6.3 V / 300 mA
Plate	250 V / 2.5 W
Screen	250 V / 0.8 W
rP	1,000,000 Ω
gm	7.5 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

High-slope wide-band RF pentode designed for broad-band high-frequency amplification. Manufacturer data identify substantial transconductance and wideband Class A service, making it suitable for demanding RF signal-amplifier stages.

Base

—

Socket code

B7G

Electrical Summary

Heater	6.3 V / 200 mA
Plate	200 V / 1.85 W
Screen	155 V / 0.55 W
Ik max	20 mA
rP	150,000 Ω
gm	5 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Ruggedized subminiature UHF pentode designed for high-frequency signal service under demanding conditions. Its compact construction combines ultra-high-frequency capability with mechanical ruggedization for equipment requiring both small size and environmental durability.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 300 mA
Plate	400 V
rP	50,000 Ω
gm	50 mA/V
μ	100

Sections

1

EMI Emitron secondary-emission pentode for wideband radio-frequency amplification. An internal secondary emitter multiplies electrons, enabling unusually high effective transconductance and gain in high-frequency amplifier stages.

Base

8FX

Socket code

SUBMINIATURE8

Electrical Summary

Heater	6.3 V / 200 mA
Plate	190 V / 1.5 W
Screen	185 V / 1 W
Ik max	14 mA
rP	250,000 Ω
gm	5.25 mA/V
μ	28

Sections

1

8 pins - SUBMINIATURE8 - Subminiature 8-lead base

High-transconductance compact pentode for professional high-frequency and wideband small-signal amplification, combining useful gain with low interelectrode capacitance.

Base

—

Socket code

B7G

Electrical Summary

Heater	6.3 V / 200 mA
Plate	550 V / 7.5 W
Screen	275 V / 0.8 W
Ik max	23 mA

Sections

1

B7G - Miniature 7-contact

High-frequency Class-A pentode for higher-voltage professional amplifier service, with approximately 7.5 W plate dissipation and plate ratings around 550 V.