Electronic tube and vacuum tube catalog

Base

9DA

Socket code

B9A

Electrical Summary

Heater	10.5 V / 300 mA
Plate	S1: 300 V / 2.5 WS2: 300 V / 2 W
Screen	S1: 0.55 W
Ik max	S1: 18 mAS2: 12 mA
rP	S1: 190,000 ΩS2: 12,000 Ω
gm	S1: 8 mA/VS2: 4.4 mA/V
μ	S2: 53

Sections

2

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

Triode-pentode for series-string television receivers, combining separate signal-amplifier functions in one miniature envelope.

Base

9HX

Socket code

B9A

Electrical Summary

Heater	10.2 V / 450 mA
Plate	S1: 300 V / 1 WS2: 300 V / 4 W
Screen	S2: 300 V / 1.7 W
Ik max	S2: 40 mA
rP	S1: 16,250 ΩS2: 100,000 Ω
gm	S1: 4 mA/VS2: 11 mA/V
μ	S1: 65S2: 65

Sections

2

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

Television triode-pentode: the triode serves sync-separator, sync-amplifier, keyed-AGC, or noise-suppressor functions while the pentode handles signal amplification.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 550 V / 1 WS2: 400 V / 5 W
Screen	S2: 330 V / 1.1 W
rP	S1: 327,000 ΩS2: 75,000 Ω
gm	S1: 2.7 mA/VS2: 12.5 mA/V
μ	S1: 100

Sections

2

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

Television triode-pentode combining sync or voltage-amplifier functions with a sharp-cutoff video-amplifier pentode.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.2 V / 450 mA
Plate	S1: 330 VS2: 330 V / 4 W
Screen	S2: 330 V / 1.1 W
rP	S1: 37,000 ΩS2: 50,000 Ω
gm	S1: 2.7 mA/VS2: 20 mA/V
μ	S1: 100S2: 100

Sections

2

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

Frame-grid television triode-pentode combining voltage-amplifier or sync-separator triode service with video-amplifier pentode operation.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 330 V / 5 WS2: 330 V / 2 W
Screen	S1: 165 V / 1.1 W
rP	S1: 55,000 ΩS2: 4,400 Ω
gm	S1: 11 mA/VS2: 10.4 mA/V
μ	S1: 46S2: 46

Sections

2

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

Television triode-pentode with a video-amplifier pentode and sync-separator triode for receiver signal-processing stages.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 330 V / 5 WS2: 330 V / 2 W
Screen	S1: 330 V / 1.1 W
rP	S1: 60,000 ΩS2: 4,400 Ω
gm	S1: 20 mA/VS2: 10.4 mA/V
μ	S1: 68S2: 46

Sections

2

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

Television triode-pentode combining a general-purpose triode amplifier with a video-amplifier pentode.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.2 V / 450 mA
Plate	S1: 330 V / 2 WS2: 330 V / 4 W
Screen	S2: 1.1 W
rP	S1: 6,000 ΩS2: 50,000 Ω
gm	S1: 5 mA/VS2: 20 mA/V
μ	S1: 30

Sections

2

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

Frame-grid sharp-cutoff pentode combined with a medium-mu triode for television video-amplifier service.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 330 V / 4 WS2: 330 V / 1.5 W
Screen	S1: 330 V / 1.5 W
rP	S1: 60,000 ΩS2: 18,700 Ω
gm	S1: 19 mA/VS2: 4 mA/V
μ	S2: 75

Sections

2

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

High-mu triode combined with a sharp-cutoff pentode for signal-amplifier service.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 330 V / 1 WS2: 330 V / 5 W
Screen	S2: 1.1 W
rP	S1: 59,000 ΩS2: 60,000 Ω
gm	S1: 1.7 mA/VS2: 20 mA/V
μ	S1: 100

Sections

2

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

Television triode-pentode with a video-amplifier pentode and general-purpose triode section.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 225 V / 4.5 WS2: 300 V / 1 W
Screen	S1: 160 V / 2 W
rP	S1: 150,000 ΩS2: 52,000 Ω
gm	S1: 9.5 mA/VS2: 2.1 mA/V
μ	S1: 60S2: 110

Sections

2

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

Television triode-pentode combining sync-separator, sync-clipper, and phase-inverter triode functions with video-amplifier pentode service.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.9 V / 450 mA
Plate	S1: 300 VS2: 330 V / 5 W
Screen	S2: 330 V / 2 W
rP	S2: 140,000 Ω
gm	S1: 4.2 mA/VS2: 12 mA/V
μ	S1: 70

Sections

2

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

Dissimilar high-mu triode and sharp-cutoff pentode for color-TV sync-separator, voltage-amplifier, and video-amplifier service.

Base

9DM

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	S1: 300 V / 3 WS2: 300 V / 2.5 W
Screen	S1: 300 V / 1 W
rP	S1: 10,000 ΩS2: 5,200 Ω
gm	S1: 7 mA/VS2: 4.9 mA/V
μ	S2: 40

Sections

2

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

Sharp-cutoff pentode plus medium-mu triode for television video/IF amplification and sync or sweep-oscillator service.

Base

—

Socket code

IO

Electrical Summary

Heater	12.6 V / 300 mA
rP	S1: 37,000 ΩS2: 200,000 Ω
gm	S1: 2.4 mA/VS2: 1.8 mA/V
μ	S1: 90S2: 360

Sections

2

8 pins - IO - International Octal

Midget triode-pentode for RF/IF amplification and detector service.

Base

9DA

Socket code

B9A

Electrical Summary

Heater	12.6 V / 300 mA
Plate	S0: 300 V / 2.75 WS1: 300 V / 2.5 W
Screen	S0: 300 V / 0.9 W
rP	S0: 150,000 ΩS1: 8,200 Ω
gm	S0: 7 mA/VS1: 4.9 mA/V
μ	S1: 40

Sections

2

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

Triode-pentode for television video-amplifier and synchronization service.

Base

9FA

Socket code

B9A

Electrical Summary

Heater	12.6 V / 225 mA
Plate	S1: 300 V / 2.5 WS2: 300 V / 2.5 W
Screen	S2: 300 V / 0.55 W
rP	S1: 5,400 ΩS2: 200,000 Ω
gm	S1: 8.5 mA/VS2: 7.5 mA/V
μ	S1: 46

Sections

2

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

Pentode-triode combination tube; available source material does not establish a narrower functional application confidently.

Base

9HX

Socket code

B9A

Electrical Summary

Heater	15 V / 300 mA
Plate	S1: 1 WS2: 250 V / 4 W
Screen	S2: 250 V / 1.7 W
Ik max	S2: 40 mA
rP	S1: 16,200 ΩS2: 150,000 Ω
gm	S1: 4 mA/VS2: 9.5 mA/V
μ	S1: 65

Sections

2

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

Television triode-pentode combining synchronization and control functions with signal amplification in color and black-and-white receivers.

Base

—

Socket code

B9A

Electrical Summary

Heater	15 V / 300 mA
Plate	S1: 250 V / 1 WS2: 250 V / 4 W
Screen	S2: 250 V / 1.7 W
rP	S2: 130,000 Ω
gm	S1: 4 mA/VS2: 10.4 mA/V
μ	S1: 65

Sections

2

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

Triode-pentode for television and radio receivers, designed for video-output, low-frequency amplifier, and automatic-control circuits; pentode dissipation is about 4 watts.

Base

—

Socket code

—

Electrical Summary

Heater	16.8 V / 150 mA
Plate	S1: 250 V / 1.5 WS2: 250 V / 1.7 W
Screen	S2: 0.75 W
Ik max	S2: 14 mA
rP	S2: 400,000 Ω
gm	S1: 5 mA/VS2: 6.2 mA/V
μ	S1: 20

Sections

2

Base

—

Socket code

B9E

Electrical Summary

Heater	16.8 V / 450 mA
Plate	S1: 250 V / 1 WS2: 250 V / 7 W
Screen	S2: 200 V / 1.8 W
Ik max	S1: 20 mAS2: 70 mA
rP	S1: 11,300 ΩS2: 11,700 Ω
gm	S1: 1.9 mA/VS2: 7.1 mA/V
μ	S1: 21.5

Sections

2

9 pins - B9E - Novar 9-contact

Triode-pentode combining a voltage-amplifier triode with a 7-watt-dissipation power pentode section for output service.

Base

9FA

Socket code

B9A

Electrical Summary

Heater	18.9 V / 150 mA
Plate	S1: 330 V / 3 WS2: 330 V / 0.55 W
Screen	S1: 0.55 W
rP	S1: 200,000 ΩS2: 54,000 Ω
gm	S1: 6.5 mA/VS2: 1.3 mA/V
μ	S2: 70

Sections

2

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

Triode-pentode for intermediate-frequency and audio-frequency voltage amplification.

Base

10H

Socket code

B10G

Electrical Summary

Heater	18.9 V / 150 mA
Plate	S1: 330 V / 2.5 WS2: 330 V / 3 W
Screen	S2: 0.55 W
rP	S1: 5,000 ΩS2: 200,000 Ω
gm	S1: 8 mA/VS2: 6.5 mA/V
μ	S1: 40

Sections

2

10 pins - B10G - Decar / Noval+1 10-contact base; center contact added to E9-1

Medium-mu triode and semi-remote-cutoff pentode intended primarily for FM RF amplification and autodyne-mixer service.

Base

8AJ

Socket code

IO

Electrical Summary

Heater	1.4 V / 100 mA
Plate	S2: 110 VS3: 110 V
Screen	S3: 110 V
Ik max	S3: 6 mA
rP	S2: 77,000 ΩS3: 300,000 Ω
gm	S2: 0.325 mA/VS3: 0.65 mA/V
μ	S2: 25

Sections

3

8 pins - IO - International Octal

Directly heated diode-triode-power-pentode combination for battery receivers; the pentode provides low-power audio output while the diode and triode handle signal functions.

Base

8T

Socket code

IO

Electrical Summary

Heater	25 V / 150 mA
Plate	S1: 100 VS2: 100 V
Screen	S2: 100 V
rP	S1: 75,000 ΩS2: 185,000 Ω
gm	S1: 1.5 mA/VS2: 2 mA/V
μ	S1: 112.5S2: 370

Sections

2

8 pins - IO - International Octal

Combined triode and RF pentode for receiving and signal-amplifier service.

Base

8AF

Socket code

IO

Electrical Summary

Heater	25 V / 150 mA
Plate	S2: 100 VS3: 100 V
Screen	S3: 100 V
rP	S2: 91,000 ΩS3: 200,000 Ω
gm	S2: 1.1 mA/VS3: 1.9 mA/V
μ	S2: 100

Sections

3

8 pins - IO - International Octal

Diode-triode-pentode for compact AC/DC receivers, combining RF/IF amplification, detector, and audio-frequency signal functions.

Base

B9A

Socket code

B9A

Electrical Summary

Heater	7.4 V / 300 mA
Plate	S1: 250 V / 2 WS2: 250 V / 2.7 W
Screen	S2: 230 V / 0.5 W
Ik max	S1: 18 mAS2: 18 mA
gm	S1: 8.5 mA/VS2: 8.5 mA/V
μ	S1: 20S2: 45

Sections

2

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

Variable-mu frame-grid triode-pentode for VHF television tuner amplification.

Base

B9A

Socket code

B9A

Electrical Summary

Heater	7.4 V / 300 mA
Plate	S1: 250 V / 2 WS2: 250 V / 2 W
Screen	S2: 230 V / 0.7 W
Ik max	S1: 15 mAS2: 18 mA
rP	S1: 31,000 Ω
gm	S1: 5.5 mA/VS2: 14.5 mA/V
μ	S1: 17S2: 60

Sections

2

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

Triode-pentode for television IF amplification with a general-purpose scanning-oscillator triode.

Base

8AS

Socket code

IO

Electrical Summary

Heater	2.8 V / 50 mA
Plate	S2: 110 VS3: 110 V
Screen	S3: 110 V
rP	S2: 200,000 ΩS3: 800,000 Ω
gm	S2: 0.325 mA/VS3: 0.75 mA/V
μ	S2: 65

Sections

3

8 pins - IO - International Octal

Directly heated diode-triode sharp-cutoff RF pentode combination for battery-operated receiving service.

Base

—

Socket code

—

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 300 V / 1 WS2: 300 V / 2 W
gm	S1: 2 mA/VS2: 6.2 mA/V
μ	S1: 100

Sections

2

High-mu triode and sharp-cutoff pentode combination for amplifier and television video service.

Base

—

Socket code

B9A

Electrical Summary

Heater	4 V / 600 mA
Plate	S1: 250 V / 2 WS2: 250 V / 2 W
Screen	S2: 150 V / 0.5 W
Ik max	S1: 15 mAS2: 18 mA
rP	S1: 5,000 ΩS2: 435,000 Ω
gm	S1: 5.5 mA/VS2: 12 mA/V
μ	S1: 17

Sections

2

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

Triode-pentode electrically equivalent to 7GS7 except for its 4.0-volt, 0.6-ampere heater.

Base

—

Socket code

—

Electrical Summary

Heater	4.5 V / 600 mA
Plate	S1: 125 V / 1.9 WS2: 250 V / 2.2 W
Screen	S2: 0.55 W
rP	S1: 3,100 ΩS2: 350,000 Ω
gm	S1: 5.5 mA/VS2: 12 mA/V
μ	S1: 17S2: 70

Sections

2

Base

—

Socket code

B9A

Electrical Summary

Heater	4.5 V / 600 mA
Plate	S1: 250 V / 1.4 WS2: 250 V / 1.2 W
Screen	S2: 250 V / 0.8 W
Ik max	S1: 10 mAS2: 15 mA
rP	S1: 20,000 Ω
gm	S1: 3.5 mA/VS2: 5.5 mA/V
μ	S1: 70

Sections

2

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

Triode-pentode for television horizontal-oscillator and automatic-frequency-control service.

Base

9DA

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 200 V / 2.6 WS2: 200 V / 2 W
Screen	S2: 300 V / 0.5 W
rP	S1: 5,750 ΩS2: 300,000 Ω
gm	S1: 3.3 mA/VS2: 6.2 mA/V
μ	S1: 19

Sections

2

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

Medium-mu triode plus sharp-cutoff pentode for television IF/video/AGC and oscillator, sync, phase-splitter, or reactance-tube circuits.

Base

9DZ

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 300 V / 2.5 WS2: 300 V / 2 W
Screen	S2: 300 V / 0.5 W
rP	S1: 5,750 ΩS2: 300,000 Ω
gm	S1: 3.3 mA/VS2: 6.2 mA/V
μ	S1: 19

Sections

2

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

Miniature medium-mu triode and sharp-cutoff pentode combination for signal-amplifier service.

Base

—

Socket code

—

Electrical Summary

Heater	4.7 V / 600 mA
rP	S1: 5,000 ΩS2: 400,000 Ω
gm	S1: 8.5 mA/VS2: 5.2 mA/V
μ	S1: 40

Sections

2

Base

9DZ

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 300 V / 1 WS2: 300 V / 2 W
Screen	S2: 300 V / 0.5 W
rP	S1: 50,000 ΩS2: 600,000 Ω
gm	S1: 2 mA/VS2: 6.2 mA/V
μ	S1: 100

Sections

2

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

High-mu triode plus sharp-cutoff pentode, heater variant of the 6CM8.

Base

9DA

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 330 V / 2.75 WS2: 330 V / 2.3 W
Screen	S2: 330 V / 0.55 W
rP	S1: 5,500 ΩS2: 300,000 Ω
gm	S1: 4 mA/VS2: 7.7 mA/V
μ	S1: 22

Sections

2

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

Triode-pentode for television intermediate-frequency amplifier service.

Base

9EG

Socket code

B9A

Electrical Summary

Heater	5.2 V / 600 mA
Plate	S1: 300 V / 2.2 WS2: 300 V / 1 W
Screen	S1: 300 V / 0.55 W
Ik max	S2: 12 mA
rP	S1: 150,000 ΩS2: 12,000 Ω
gm	S1: 8.6 mA/VS2: 4.4 mA/V
μ	S2: 53

Sections

2

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

Sharp-cutoff pentode and high-mu triode for television video-IF and detector/amplifier service.

Base

9AE

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 330 V / 2.5 WS2: 350 V / 2.5 W
Screen	S2: 330 V / 0.55 W
Ik max	S2: 20 mA
rP	S1: 5,400 ΩS2: 200,000 Ω
gm	S1: 8.5 mA/VS2: 7.5 mA/V
μ	S1: 46

Sections

2

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

Combined medium-mu triode and sharp-cutoff pentode for television horizontal oscillator, multivibrator, frequency-control, and related amplifier circuits.

Base

9AE

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 330 V / 2.5 WS2: 350 V / 2.5 W
Screen	S2: 330 V / 0.55 W
Ik max	S2: 20 mA
rP	S1: 5,400 ΩS2: 200,000 Ω
gm	S1: 8.5 mA/VS2: 7.5 mA/V
μ	S1: 46

Sections

2

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

Combined medium-mu triode and sharp-cutoff pentode for television horizontal oscillator, multivibrator, frequency-control, and related amplifier circuits.

Base

9AE

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 260 V / 1.4 WS2: 250 V / 1.2 W
Screen	S2: 250 V / 0.8 W
Ik max	S1: 10 mAS2: 60 mA
rP	S1: 8,500 ΩS2: 200,000 Ω
gm	S1: 3.5 mA/VS2: 5.6 mA/V
μ	S1: 70

Sections

2

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

Combined medium-mu triode and sharp-cutoff pentode for television horizontal oscillator, multivibrator, frequency-control, and related amplifier circuits.

Base

9FA

Socket code

B9A

Electrical Summary

Heater	5.6 V / 450 mA
Plate	S1: 280 V / 2 WS2: 280 V / 2 W
Screen	S2: 280 V
rP	S1: 7,250 ΩS2: 200,000 Ω
gm	S1: 8 mA/VS2: 13 mA/V
μ	S1: 58

Sections

2

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

Frame-grid triode-pentode for color television, using the triode as a video amplifier and pentode as a burst amplifier.

Base

9FA

Socket code

B9A

Electrical Summary

Heater	5.6 V / 600 mA
Plate	S1: 330 V / 2.5 WS2: 330 V / 2.5 W
Screen	S2: 330 V
rP	S1: 150,000 Ω
gm	S1: 10 mA/V
μ	S1: 40

Sections

2

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

Triode-pentode for color and monochrome television band-pass, video, sync, color-killer, matrix, and blanking circuits.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	5.9 V / 450 mA

Sections

2

Refer to variations

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	5.9 V / 450 mA
Plate	S1: 275 V / 1.75 WS2: 275 V / 2.4 W
Screen	S2: 275 V / 0.8 W

Sections

2

Refer to variations

Base

DAT

Socket code

B9A

Electrical Summary

Heater	6.3 V / 300 mA
Plate	S1: 350 V / 1 WS2: 350 V / 3.9 W
Screen	S2: 250 V / 0.75 W
Ik max	S1: 15 mAS2: 25 mA
rP	S1: 150,000 ΩS2: 150,000 Ω
gm	S1: 3.4 mA/VS2: 3.4 mA/V
μ	S1: 17.5

Sections

2

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

Common-cathode triode plus power pentode for television frame time-base, sync-separator, and audio-output service.

Base

8AY

Socket code

IO

Electrical Summary

Heater	6.3 V / 850 mA
Plate	S1: 285 VS2: 375 V
Screen	S2: 285 V
rP	S1: 19,000 ΩS2: 80,000 Ω
gm	S1: 0.325 mA/VS2: 2.5 mA/V
μ	S1: 6

Sections

2

8 pins - IO - International Octal

Triode plus power-amplifier pentode intended for Class-A amplification and output service.

Base

E12

Socket code

B12C

Electrical Summary

Heater	6.3 V / 820 mA
Plate	S1: 330 V / 10 WS2: 330 V / 1.1 W
Screen	S1: 200 V / 1.5 W
rP	S1: 40,000 ΩS2: 8,500 Ω
gm	S1: 30 mA/VS2: 4.6 mA/V
μ	S2: 39

Sections

2

12 pins - B12C - Duodecar 12-contact

Combined triode-pentode for television video, IF, AGC, sync, burst, band-pass, or related signal-processing stages.

Base

E12-70

Socket code

B12C

Electrical Summary

Heater	6.3 V / 900 mA
Plate	S1: 400 V / 10 WS2: 330 V / 2 W
Screen	S1: 1 W
rP	S1: 55,000 ΩS2: 7,500 Ω
gm	S1: 21 mA/VS2: 2.67 mA/V
μ	S2: 20

Sections

2

12 pins - B12C - Duodecar 12-contact

Compactron frame-grid sharp-cutoff video pentode plus medium-mu triode for color-television video and blanking applications.

Base

—

Socket code

B12C

Electrical Summary

Heater	6.3 V / 820 mA
Screen	S2: 200 V / 1.5 W
gm	S1: 6.3 mA/VS2: 30 mA/V
μ	S1: 59

Sections

2

12 pins - B12C - Duodecar 12-contact

Combined triode-pentode for television video, IF, AGC, sync, burst, band-pass, or related signal-processing stages.

Base

9DA

Socket code

B9A

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S1: 300 V / 1 WS2: 300 V / 3.5 W
Screen	S2: 300 V / 0.5 W
rP	S1: 4,700 ΩS2: 170,000 Ω
gm	S1: 4.5 mA/VS2: 7.8 mA/V
μ	S1: 21

Sections

2

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

Combined triode-pentode for television video, IF, AGC, sync, burst, band-pass, or related signal-processing stages.