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Voltage Radio Detector Converter ·Pentode-Triode

10HF8

Frame-grid triode-pentode used as combined oscillator and mixer stages in VHF color and black-and-white television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

Miniature type with frame-grid pentode unit used as 9MP combined oscillator and mixer tubes in vhf color and black-and-white television receivers. Outlines section, 6B; requires minia- ture 9-contact socket. Types 5HG8/LCF86 and 7HG8/PCF86 are identical with type 6HG8/ECF86 except for heater ratings. 5HG8/ 6HG8/ 7HG8/ LCF86 ECF86 PCF86

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9DX
Socket code: -
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: 17500 Ω
Transconductance: 0.004 S
Amplification factor: 70
Max plate voltage: 330 V
Max plate dissipation: 1 W

Inherited from explicitly referenced parent type 6HF8; supplied sheet changes heater rating.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 75000 Ω
Transconductance: 0.0125 S
Amplification factor: 70
Max plate voltage: 330 V
Max screen voltage: 330 V
Max plate dissipation: 5 W
Max screen dissipation: 1.1 W

Inherited from explicitly referenced parent type 6HF8; supplied sheet changes heater rating.

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

Capacitance

Grid to Plate
3.5 pF
Input Capacitance
2.8 pF
Output Capacitance
2.6 pF
Plate To K, T.S5., G3, G2 & H.
4.2 pF
Triode Grid To Pentode Plate (Max.)
0.015 pF

Other

Heater Warm—Up Time (Average)
11 s

Characteristic

Cathode Resistor —— ——
68 ohm
Grid #
2 %
Ef =
10.5 V
Ep =
200 V
Py E~
125 V

SECTION 2

Pentode

Capacitance

Grid #1 to Plate
0.1 pF
Input Capacitance
10 pF
Output Capacitance
4.2 pF

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
200 V
TriodeSection
Grid 1 voltage
-2 V
TriodeSection
Plate current
4 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

Data set 03

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Grid-to-plate capacitance
3.5 pF
Inherited from explicitly referenced 6HF8 parent type.
Input capacitance
2.8 pF
Inherited from explicitly referenced 6HF8 parent type.
Output capacitance
2.6 pF
Inherited from explicitly referenced 6HF8 parent type.

Other

Plate supply voltage
200 V
ClassA1 Inherited from explicitly referenced 6HF8 parent type.
Grid 1 voltage
-2 V
ClassA1 Inherited from explicitly referenced 6HF8 parent type.
Plate current
4 mA
ClassA1 Inherited from explicitly referenced 6HF8 parent type.

SECTION 2

Pentode

Capacitance

Grid 1 to plate capacitance
0.1 pF
Inherited from explicitly referenced 6HF8 parent type.
Input capacitance
10 pF
Inherited from explicitly referenced 6HF8 parent type.
Output capacitance
4.2 pF
Inherited from explicitly referenced 6HF8 parent type.

Other

Plate supply voltage
200 V
ClassA1 Inherited from explicitly referenced 6HF8 parent type.
Screen supply voltage
125 V
ClassA1 Inherited from explicitly referenced 6HF8 parent type.
Plate current
25 mA
ClassA1 Inherited from explicitly referenced 6HF8 parent type.

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Voltage (ac/dc)
10.5 volts
Published value from supplied target entry
Heater Current
0.45 ampere
Published value from supplied target entry
Plate Voltage
330 volts
Published value from supplied target entry
Grid-No
330 volts
Published value from supplied target entry
Grid-No
2
Published value from supplied target entry
Plate Dissipation
5 watts
Published value from supplied target entry
For grid-No
165 volts
Published value from supplied target entry
For grid-No
330 volts
Published value from supplied target entry
Plate Supply Voltage
200 volts
Published value from supplied target entry
Grid-No
125 volts
Published value from supplied target entry
Grid-No.l Voltage
2
Published value from supplied target entry
Amplification Factor
70
Published value from supplied target entry
Plate Resistance (Approx.)
75000 ohms
Published value from supplied target entry
Transconductance
12500
Published value from supplied target entry
Plate Current
25 mA
Published value from supplied target entry
Heater Voltage (ac/dc)
7.2 volts
Published value from supplied target entry
Heater Current
0.3 ampere
Published value from supplied target entry
Plate Voltage
250 volts
Published value from supplied target entry
Grid-No
150 volts
Published value from supplied target entry
Cathode Current
18
Published value from supplied target entry
Plate Dissipation
2 watts
Published value from supplied target entry
Grid-No
0.5 watt
Published value from supplied target entry
Plate Voltage
170 volts
Published value from supplied target entry
Grid-No
160 volts
Published value from supplied target entry
Voltage
-1.2 volts
Published value from supplied target entry
Amplification Factor
17
Published value from supplied target entry

Capacitance

Grid to Plate
3.6 pF
Published value from supplied target entry
Grid to Cathode, Heater, Pentode Cathode, Grid No
3
Published value from supplied target entry
Plate to Cathode, Heater, Pentode Cathode, Grid No
3
Published value from supplied target entry
Plate to Cathode, Heater, Grid No
3
Published value from supplied target entry
Triode Grid to Pentode Plate
0.016 pF
Published value from supplied target entry

Other

Peak Heater-Cathode Voltage ±
100 volts
Published value from supplied target entry