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10EB8

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

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9DX
Socket code: B9A
Base pins: 9
Nominal heater: 10.5 V / 450 mA

Description

The 10EB8 combines a high-mu triode for voltage-amplifier, sync-separator, sync-clipper or phase-inverter service with a sharp-cutoff pentode designed for television video amplification.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9DX
Socket code: B9A
Base pins: 9
Nominal heater voltage: 10.5 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9DX - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12K	B	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN22G1	B	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN32P	B	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN4H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN5H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN61G3	A	G3 — Suppressor GridGroup 9DX6 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN6IS	A	IS — Internal ScreenGroup 9DX6 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN61K	A	K — CathodeGroup 9DX6 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN71G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN81G2	A	G2 — Screen Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX
PIN91P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DX

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 327000 Ω
Transconductance: 0.0027 S
Amplification factor: 100
Max plate voltage: 550 V
Max plate dissipation: 1 W

High-mu triode voltage-amplifier/sync section.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 75000 Ω
Transconductance: 0.0125 S
Max plate voltage: 400 V
Max screen voltage: 330 V
Max plate dissipation: 5 W
Max screen dissipation: 1.1 W

Sharp-cutoff video-amplifier pentode section with controlled plate-knee characteristic.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
250 V
TriodeSection
Heater Warmup Time
11 s

Characteristic

Plate Current
2 mA
TriodeSection

SECTION 2

Pentode

Other

Plate Voltage
200 V
PentodeSection
Screen Voltage
126 V
PentodeSection

Characteristic

Plate Current
25 mA
PentodeSection

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Plate voltage
250 V
TriodeSection
Grid 1 voltage
-2 V
TriodeSection
Plate current
2 mA
TriodeSection
Heater warm-up time
11 s
WholeTube

SECTION 2

Pentode

Other

Plate voltage
200 V
PentodeSection;VideoAmplifier
Grid 2 voltage
125 V
PentodeSection;VideoAmplifier
Plate current
25 mA
PentodeSection;VideoAmplifier
Grid 2 current
7 mA
PentodeSection;VideoAmplifier