Electronic tube and vacuum tube catalog

Base

—

Socket code

IO

Electrical Summary

Heater	10 V / 320 mA
Plate	250 V / 1.9 W
Screen	180 V / 0.4 W
rP	500,000 Ω
gm	1.85 mA/V

Sections

1

6 pins - IO - International Octal

Russian pentode documented in bilingual manufacturer literature with guaranteed electrical characteristics. The available source establishes pentode operation but does not expose enough explicit application wording to justify a stronger functional category than its existing sharp-cutoff grouping.

Base

—

Socket code

—

Electrical Summary

Heater	10 V
Plate	250 V / 2 W
Screen	225 V / 0.7 W
gm	1.702 mA/V

Sections

1

Russian universal short-characteristic pentode designed for voltage and power amplification and high-frequency oscillation to about 200 MHz. Manufacturer documentation specifies a 2,500-hour service-life guarantee and broad amplifier/oscillator capability.

Base

—

Socket code

LOCTAL8

Electrical Summary

Heater	10 V / 93 mA
Plate	250 V / 2 W
Screen	225 V / 0.7 W
gm	1.7 mA/V

Sections

1

8 pins - LOCTAL8 - Loctal 8-contact base

Russian short-characteristic pentode intended for communications and general signal service. Manufacturer documentation specifies a 1,000-hour service-life guarantee and conventional voltage-amplifier operating characteristics.

Base

9BF

Socket code

—

Electrical Summary

Heater	11 V / 300 mA
Plate	330 V / 7 W
Screen	330 V / 1 W
rP	40,000 Ω
gm	30 mA/V

Sections

1

9 pins

Miniature frame-grid sharp-cutoff pentode with series/parallel heater arrangement, designed as a color-television video-output amplifier. Its high-transconductance construction is optimized for wideband video drive.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	6.3 V / 150 mA
Plate	300 V / 1.2 W
Screen	100 V / 0.15 W
rP	500,000 Ω
gm	1.8 mA/V

Sections

1

8 pins

Pentode documented with nominal and typical operating conditions and associated with the 7AB7 family. Available source material supports conventional sharp-cutoff signal amplification without a stronger specialized functional identity.

Base

—

Socket code

—

Electrical Summary

Heater	6.3 V / 300 mA
Plate	300 V / 0.75 W
Screen	125 V / 0.1 W
rP	1,500,000 Ω
gm	1.225 mA/V

Sections

1

6 pins

Special low-microphonics version of the Sylvania 6C6 sharp-cutoff pentode, designed for receiver and amplifier stages requiring reduced mechanical noise. It uses a six-pin base and retains the electrical characteristics of the standard 6C6.

Base

8-V

Socket code

Refer to variations

Electrical Summary

Heater	7 V / 480 mA
rP	700,000 Ω
gm	5.5 mA/V
μ	3,850

Sections

1

8 pins

Sylvania triple-grid amplifier tube with published pentode, tetrode-connected, and triode-connected operating data. Its flexible electrode connections permit several amplifier configurations while retaining a conventional signal-amplifier role.

Base

8-V

Socket code

Refer to variations

Electrical Summary

Heater	7 V / 480 mA
Plate	1.5 W
Screen	0.2 W
rP	800,000 Ω
gm	4.5 mA/V

Sections

1

8 pins

Sylvania triple-grid amplifier pentode with published operating characteristics and interelectrode capacitances. Manufacturer data establish conventional signal-amplifier service without sufficiently explicit evidence for a stronger functional category.

Base

7BK

Socket code

B7G

Electrical Summary

Heater	12.6 V / 150 mA
Plate	250 V / 2.5 W
Screen	200 V / 0.75 W
rP	500,000 Ω
gm	2.9 mA/V
μ	36

Sections

1

7 pins - B7G - Miniature 7-contact

Sharp-cutoff voltage pentode designed for RF amplification with a series heater. Its abrupt cutoff characteristic suits fixed-gain high-frequency signal stages rather than automatic-gain-controlled remote-cutoff service.

Base

—

Socket code

—

Electrical Summary

Heater	12.6 V / 150 mA
Plate	300 V / 2 W
Screen	150 V / 0.5 W
rP	500,000 Ω
gm	5.1 mA/V

Sections

1

7 pins

Sharp-cutoff pentode with a separately connected suppressor grid for RF, IF, and general amplifier service. The independent suppressor connection permits additional circuit flexibility beyond ordinary fixed-suppressor pentodes.

Base

9BF

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	300 V / 6.25 W
Screen	175 V / 1 W
rP	85,000 Ω
gm	13 mA/V

Sections

1

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

Sharp-cutoff pentode designed as a television video amplifier. Part of the 12BY7A/12BV7/12DQ7 replacement family, it is fundamentally a high-transconductance wideband signal tube rather than an audio power-output pentode.

Base

—

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	300 V / 6.5 W
Screen	180 V / 1.1 W
rP	93,000 Ω
gm	11 mA/V

Sections

1

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

High-transconductance video-amplifier pentode with series/parallel heater operation. Its wideband fixed-gain characteristics are optimized for television video service rather than conventional low-frequency power output.

Base

9BF

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	300 V / 6.5 W
Screen	180 V / 1.1 W
rP	93,000 Ω
gm	11 mA/V

Sections

1

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

Sharp-cutoff pentode designed for television video amplification. It belongs to the 12BY7A/12BV7/12DQ7 replacement family and provides high-transconductance wideband signal gain rather than ordinary audio power output.

Base

—

Socket code

—

Electrical Summary

Heater	12.6 V / 150 mA
Plate	33 V
Screen	33 V
rP	40,000 Ω
gm	3.1 mA/V

Sections

1

7 pins

RCA 12CX6 sharp-cutoff 7-pin miniature pentode for low-voltage automobile radios operating directly from 12 V storage batteries.

Base

—

Socket code

B7G

Electrical Summary

Heater	12.6 V / 200 mA
Plate	33 V
Screen	33 V
rP	140,000 Ω
gm	3.25 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Sylvania pentode documented with manufacturer electrical and operating data. The available source does not provide sufficiently clear application or cutoff terminology in the extracted material to justify a narrower functional classification beyond pentode.

Base

—

Socket code

B7G

Electrical Summary

Heater	12.6 V / 150 mA
Plate	330 V / 2.3 W
Screen	330 V
rP	350,000 Ω
gm	9.8 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Sharp-cutoff miniature pentode designed as an IF amplifier in color and black-and-white television receivers. Its fixed-gain high-frequency characteristics suit television intermediate-frequency signal stages.

Base

9BF

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	330 V / 6.5 W
Screen	330 V / 1.1 W
rP	53,000 Ω
gm	10.5 mA/V

Sections

1

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

Sharp-cutoff television video-amplifier pentode in the 12BY7A/12BV7/12DQ7 replacement family. Its high-frequency wideband characteristics make it a fixed-gain video signal tube rather than a conventional power pentode.

Base

—

Socket code

B7G

Electrical Summary

Heater	12.6 V / 150 mA
Plate	330 V / 1.7 W
Screen	330 V / 1.1 W
rP	150,000 Ω
gm	0.8 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Seven-pin miniature sharp-cutoff pentode with manufacturer-published ratings, characteristics, and application information. Its abrupt transfer characteristic identifies it as a fixed-gain signal amplifier rather than a remote-cutoff AGC tube.

Base

THE

Socket code

B7G

Electrical Summary

Heater	12.6 V / 150 mA
Plate	330 V / 2 W
Screen	330 V
Ik max	10 mA
rP	300,000 Ω
gm	6 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Seven-pin miniature sharp-cutoff pentode designed for low-voltage amplifier service from automotive battery supplies. It combines fixed-gain signal amplification with operating conditions suited to vehicle electrical systems.

Base

—

Socket code

—

Electrical Summary

Heater	12.6 V / 150 mA
Plate	250 V / 3 W
Screen	100 V / 0.6 W
gm	4.4 mA/V

Sections

1

150 mA series-heater RF and IF pentode designed for high-frequency amplifier service. Manufacturer documentation provides nominal, operating, and maximum data for receiver signal stages using series heater strings.

Base

9BF

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	400 V / 11.5 W
Screen	330 V / 1.5 W
rP	50,000 Ω
gm	36 mA/V

Sections

1

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

Frame-grid sharp-cutoff pentode designed for video-amplifier service in color and black-and-white television receivers. Its high transconductance and wideband response suit demanding television video stages.

Base

9BF

Socket code

B9A

Electrical Summary

Heater	12.6 V / 260 mA
Plate	400 V / 10 W
Screen	330 V / 1 W
Ik max	40 mA
rP	60,000 Ω
gm	32 mA/V

Sections

1

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

Frame-grid sharp-cutoff pentode designed for television video-amplifier service. Its specialized grid construction provides high transconductance and bandwidth for color and monochrome television signal amplification.

Base

9BF

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	330 V / 10 W
Screen	1 W
rP	55,000 Ω
gm	21 mA/V

Sections

1

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

Frame-grid sharp-cutoff pentode used as a video-output amplifier in color television receivers. Its high-transconductance wideband construction provides the signal drive required by television video-output stages.

Base

—

Socket code

B8G

Electrical Summary

Heater	12.6 V / 75 mA
Plate	250 V / 2 W
Screen	225 V / 0.7 W
gm	1.65 mA/V

Sections

1

8 pins - B8G - Loctal 8-contact

Russian universal pentode designed to withstand demanding ambient conditions. Bilingual manufacturer literature provides guaranteed electrical characteristics, but the available application wording is not specific enough to assign a narrower functional family conservatively.

Base

7R

Socket code

IO

Electrical Summary

Heater	12.6 V / 150 mA
Plate	300 V / 0.75 W
Screen	125 V / 0.1 W
gm	1.225 mA/V

Sections

1

7 pins - IO - International Octal

Brimar RF pentode with documented pentode and triode-connected Class A operation. Its 12.6 V heater and high anode impedance suit fixed-gain high-frequency signal-amplifier service.

Base

8BK

Socket code

—

Electrical Summary

Heater	12.6 V / 150 mA
Plate	300 V
Screen	150 V
rP	900,000 Ω
gm	4.9 mA/V

Sections

1

8 pins

Sharp-cutoff RF pentode designed for Class A RF and IF amplifier service. Its abrupt cutoff characteristic suits fixed-gain receiver signal stages rather than automatic-gain-controlled variable-mu operation.

Base

8N

Socket code

IO

Electrical Summary

Heater	12.6 V / 150 mA
Plate	330 V / 2.75 W
Screen	140 V / 0.44 W
Ik max	6 mA
rP	700,000 Ω
gm	1.575 mA/V

Sections

1

8 pins - IO - International Octal

RF pentode with documented pentode and triode-connected Class A operation. Its signal-amplifier characteristics suit RF and general voltage-amplifier stages requiring a sharp-cutoff transfer characteristic.

Base

8N

Socket code

IO

Electrical Summary

Heater	12.6 V / 150 mA
Plate	300 V
Screen	150 V
rP	1,000,000 Ω
gm	1.65 mA/V

Sections

1

8 pins - IO - International Octal

Single-ended RF pentode designed for amplifier or anode-bend detector service in AC/DC equipment. Its ability to serve as a detector supplements its primary fixed-gain signal-amplifier function.

Base

—

Socket code

B8G

Electrical Summary

Heater	12.6 V / 75 mA
Plate	250 V / 2 W
Screen	225 V / 0.7 W
Ik max	11 mA
gm	1.65 mA/V

Sections

1

8 pins - B8G - Loctal 8-contact

Russian universal short-characteristic pentode designed for voltage and power amplification and high-frequency oscillation to about 200 MHz. Manufacturer documentation specifies a 2,000-hour service-life guarantee.

Base

8V

Socket code

LOCTAL8

Electrical Summary

Heater	12.6 V / 150 mA
Plate	300 V / 1 W
Screen	100 V / 0.1 W
rP	400,000 Ω
gm	2.275 mA/V

Sections

1

8 pins - LOCTAL8 - Loctal 8-contact base

Series-heater counterpart of the 7C7 sharp-cutoff general-purpose pentode amplifier. It provides fixed-gain signal amplification in equipment using series-connected heater strings.

Base

—

Socket code

B7G

Electrical Summary

Heater	15 V / 150 mA
Plate	330 V / 3.1 W
Screen	330 V / 0.65 W
rP	200,000 Ω
gm	14 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Sharp-cutoff seven-pin miniature pentode designed for television intermediate-frequency amplifier service. Its fixed-gain high-frequency characteristics suit IF stages in television receivers.

Base

—

Socket code

UX6

Electrical Summary

Heater	6.3 V / 300 mA
Plate	250 V
Screen	100 V
rP	1,500,000 Ω
gm	1.225 mA/V
μ	1,500

Sections

1

6 pins - UX6 - Small 6-contact

Low-noise, low-microphonic heater-cathode pentode designed for preamplifier service. RCA documentation emphasizes sensitive low-level amplification where both electrical noise and vibration-induced microphonics must be minimized.

Base

—

Socket code

UX5

Electrical Summary

Heater	1.1 V / 250 mA
Plate	135 V / 1.5 W
Screen	67.5 V / 1 W
rP	400,000 Ω
gm	0.725 mA/V
μ	300

Sections

1

5 pins - UX5 - Small 5-contact

Coated-filament sharp-cutoff pentode designed for Class A amplifier service. RCA later recommended type 1620 for new equipment, but the 1609 remains a fixed-gain signal amplifier with filamentary cathode construction.

Base

7R

Socket code

IO

Electrical Summary

Heater	6.3 V / 300 mA
Plate	250 V / 1.75 W
Screen	100 V
rP	1,000,000 Ω
gm	1.225 mA/V

Sections

1

7 pins - IO - International Octal

Metal sharp-cutoff pentode electrically similar to the 6J7 but selected for low-microphonic applications. Manufacturer data include normal pentode and triode-connected operation for sensitive Class A signal amplification.

Base

—

Socket code

B7G

Electrical Summary

Heater	16 V / 300 mA
Plate	300 V / 1.7 W
Screen	300 V / 1 W
rP	140,000 Ω
gm	3.7 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Sharp-cutoff dual-control-grid pentode designed for gated AGC and television noise-inverter service. The second control grid enables specialized gating and noise-control functions beyond ordinary fixed-gain pentode amplification.

Base

Refer to variations

Socket code

IO

Electrical Summary

Heater	6.3 V / 450 mA
Plate	300 V / 3 W
Screen	300 V / 0.75 W
rP	750,000 Ω
gm	9 mA/V

Sections

1

8 pins - IO - International Octal

Sharp-cutoff high-transconductance pentode co-designated 6AC7/1852. Manufacturer data specify substantial transconductance for Class A RF or IF amplification, making it a high-gain fixed-control signal tube.

Base

—

Socket code

B7G

Electrical Summary

Heater	18 V / 100 mA
Plate	150 V / 2.5 W
Screen	0.6 W
rP	500,000 Ω
gm	4.3 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Sharp-cutoff miniature pentode for RF and IF amplification in AC/DC receivers using 100 mA series-heater strings.

Base

—

Socket code

B7G

Electrical Summary

Heater	18 V / 100 mA
Plate	150 V / 2.5 W
Screen	150 V / 0.6 W
Ik max	20 mA
rP	500,000 Ω
gm	4.3 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Controlled-warm-up sharp-cutoff pentode for RF and IF amplification in transformerless series-heater receiver circuits.

Base

—

Socket code

B9A

Electrical Summary

Heater	18.9 V / 300 mA
Plate	300 V / 3 W
Screen	150 V / 0.75 W
Ik max	25 mA
rP	350,000 Ω
gm	9 mA/V

Sections

1

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

Sharp-cutoff high-transconductance pentode for RF and IF voltage amplification, using an 18.9 V heater for series-string equipment.

Base

E7-1

Socket code

—

Electrical Summary

Heater	19 V / 100 mA
Plate	275 V / 2.2 W
Screen	165 V / 0.44 W
Ik max	22 mA
rP	260,000 Ω
gm	6.2 mA/V

Sections

1

7 pins

Long-life sharp-cutoff pentode developed for voltage amplification in professional wire-communications equipment.

Base

6AR

Socket code

B7G

Electrical Summary

Heater	1.25 V / 100 mA
Plate	390 V
Screen	90 V
Ik max	11 mA
rP	500,000 Ω
gm	1.55 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Directly heated high-slope pentode for low-voltage RF and general voltage amplification in portable battery equipment.

Base

6AR

Socket code

B7G

Electrical Summary

Heater	1.4 V / 25 mA
Plate	110 V
Screen	90 V
Ik max	2.5 mA
rP	1,800,000 Ω
gm	0.95 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Ultra-low-drain directly heated sharp-cutoff pentode for battery-operated RF and small-signal voltage amplification.

Base

4M

Socket code

UX4

Electrical Summary

Heater	2 V / 60 mA
Plate	180 V
Screen	67.5 V
Ik max	6 mA
rP	1,000,000 Ω
gm	0.6 mA/V
μ	550

Sections

1

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

Directly heated sharp-cutoff RF pentode for fixed-gain Class-A amplification in battery receivers.

Base

5Y

Socket code

UX5

Electrical Summary

Heater	2 V / 60 mA
Plate	180 V
Screen	67.5 V
Ik max	6 mA
rP	1,000,000 Ω
gm	0.6 mA/V
μ	550

Sections

1

5 pins - UX5 - Small 5-contact

Directly heated sharp-cutoff pentode for Class-A RF voltage amplification in economical battery-operated receivers.

Base

6AR

Socket code

B7G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V / 0.4 W
Screen	90 V / 0.15 W
Ik max	6.5 mA
rP	350,000 Ω
gm	1.025 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Directly heated fixed-mu pentode for RF or audio-frequency voltage amplification in battery equipment.

Base

7AO

Socket code

B8G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	45 V
rP	1,000,000 Ω
gm	0.775 mA/V

Sections

1

8 pins - B8G - Loctal 8-contact

Directly heated sharp-cutoff RF pentode for small-signal amplification in low-drain battery receivers.

Base

7AO

Socket code

B8G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
rP	1,100,000 Ω
gm	0.8 mA/V
μ	880

Sections

1

8 pins - B8G - Loctal 8-contact

Directly heated sharp-cutoff RF pentode for low-voltage battery receivers, providing high voltage gain with economical filament consumption.

Base

—

Socket code

B8G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	90 V
Screen	90 V
rP	1,100,000 Ω
gm	0.8 mA/V

Sections

1

8 pins - B8G - Loctal 8-contact

Low-drain loctal battery RF pentode intended for radio-frequency amplifier service, related to the 1N5 receiving family.

Base

5Y

Socket code

IO

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
Ik max	6.5 mA
rP	1,500,000 Ω
gm	0.75 mA/V

Sections

1

7 pins - IO - International Octal

Directly heated sharp-cutoff pentode for RF and IF amplification in battery-operated receivers.

Base

5Y

Socket code

IO

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
Ik max	5 mA
rP	1,900,000 Ω
gm	0.75 mA/V

Sections

1

7 pins - IO - International Octal

Directly heated sharp-cutoff battery pentode designed for portable radio RF and intermediate-frequency amplifier stages.