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Voltage Radio Detector Converter ·Pentode-Triode

6KD8

Medium-mu triode and sharp-cutoff pentode for combined television oscillator and mixer service around a 40-MHz intermediate frequency.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9AE
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 400 mA

Description

Medium-mu triode and sharp-cutoff pentode for combined television oscillator and mixer service around 40 MHz. Explicit heater variant/co-designation of 9U8A in the approved source.

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: 9AE
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 400 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9AE - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN21G1	A	G1 — Control Grid Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN31G2	A	G2 — Screen Grid Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN4H	—	H — Heater Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN5H	—	H — Heater Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN61P	A	P — Plate (Anode) Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN71G3	A	G3 — Suppressor GridGroup 9AE7 Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN7IS	A	IS — Internal ScreenGroup 9AE7 Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN71K	A	K — CathodeGroup 9AE7 Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN82K	B	K — Cathode Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN92G1	B	G1 — Control Grid Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0075 S
Amplification factor: 40
Max plate voltage: 330 V
Max plate dissipation: 2.5 W

Published maximum ratings and characteristics promoted semantically from the approved source.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 200000 Ω
Transconductance: 0.005 S
Max plate voltage: 330 V
Max screen voltage: 330 V
Max plate dissipation: 3 W
Max screen dissipation: 0.55 W

Published maximum ratings and characteristics promoted semantically from the approved source.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Transconductance
7500 µS

Other

Maximum Plate Voltage
330 V
Maximum Plate Dissipation
2.5 W
Plate Voltage
125 V
Triode oscillator
Plate Current
13.5 mA
Triode section

SECTION 2

Pentode

Characteristic

Plate Resistance
200000 ohm
Transconductance
5000 µS

Other

Maximum Plate Voltage
330 V
Maximum Screen Voltage
330 V
Maximum Plate Dissipation
3 W
Maximum Screen Dissipation
0.55 W
Plate Current
9.5 mA
Pentode mixer

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
125 V
Triode typical operation

Characteristic

Plate Current
3.5 mA
Triode typical operation

SECTION 2

Pentode

Other

Plate Voltage
125 V
Pentode typical operation
Screen Voltage
110 V
Pentode typical operation

Characteristic

Plate Current
9.5 mA
Pentode typical operation
Screen Current
3.5 mA
Pentode typical operation

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
125 V
ClassA

Characteristic

Amplification factor
40
ClassA

Capacitance

Input capacitance
3 pF
Section1
Output capacitance
3 pF
Section1

SECTION 2

Pentode

Other

Plate voltage
125 V
ClassA
Screen voltage
100 V
ClassA

Characteristic

Transconductance
6400 uS
ClassA
Plate resistance
200000 ohm
ClassA

Capacitance

Input capacitance
3 pF
Section2
Output capacitance
3 pF
Section2

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

^fc T
40 MHz
Other;PublishedValue1
^fc T
4.7 MHz
Other;PublishedValue2
^fc T
6 MHz
Other;PublishedValue3
^fc T
9 MHz
Other;PublishedValue4
Heater Warm-up Time (Average)
11 s
Other;PublishedValue1
Heater Warm-up Time (Average)
11 s
Other;PublishedValue2
Heater Warm-up Time (Average)
11 s
Other;PublishedValue3
Peak value
200 V
Other;PublishedValue1
Peak value
200 V
Other;PublishedValue2
Average value
100 V
Other;PublishedValue1
Average value
100 V
Other;PublishedValue2
Plate Voltage
330 V
MaximumRating;PublishedValue1
Plate Voltage
330 V
MaximumRating;PublishedValue2
Grid-No
2 V
MaximumRating;PublishedValue1
Grid-No
330 V
MaximumRating;PublishedValue2
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating;PublishedValue1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating;PublishedValue2
Plate Dissipation
2.5 W
MaximumRating;PublishedValue1
Plate Dissipation
3 W
MaximumRating;PublishedValue2
For grid-No
2 V
MaximumRating;PublishedValue1
For grid-No
165 V
MaximumRating;PublishedValue2
For grid-No
0.55 V
MaximumRating;PublishedValue3
For grid-No
2 V
MaximumRating;PublishedValue1
For grid-No
165 V
MaximumRating;PublishedValue2
For grid-No
330 V
MaximumRating;PublishedValue3
For grid-No
300 V
MaximumRating;PublishedValue4
Maximum Plate Voltage
330 V
Section1
Maximum Plate Dissipation
2.5 W
Section1

Capacitance

Grid to Plate
1.8 pF
Capacitance;PublishedValue1
Grid to Plate
1.8 pF
Capacitance;PublishedValue2
Pentode Grid No
3 pF
Capacitance;PublishedValue1
Pentode Grid No
2.8 pF
Capacitance;PublishedValue2
Pentode Grid No
2.8 pF
Capacitance;PublishedValue3
Pentode Grid No
3 pF
Capacitance;PublishedValue1
Pentode Grid No
1.5 pF
Capacitance;PublishedValue2
Pentode Grid No
2 pF
Capacitance;PublishedValue3
Grid No.l to Plate
0.01 pF
Capacitance;PublishedValue1
Grid No.l to Plate
0.006 pF
Capacitance;PublishedValue2
Grid No
3 pF
Capacitance;PublishedValue1
Grid No
5 pF
Capacitance;PublishedValue2
Grid No
5 pF
Capacitance;PublishedValue3
Grid No
3 pF
Capacitance;PublishedValue1
Grid No
2.6 pF
Capacitance;PublishedValue2
Grid No
3.5 pF
Capacitance;PublishedValue3
Triode Cathode to Heater
3 pF
Capacitance;PublishedValue1
Triode Cathode to Heater
3 pF
Capacitance;PublishedValue2
Internal Shield
3 pF
Capacitance;PublishedValue1
Internal Shield
3 pF
Capacitance;PublishedValue2
Pentode Grid No.l to Triode Plate
0.2 pF
Capacitance;PublishedValue1
Pentode Grid No.l to Triode Plate
0.2 pF
Capacitance;PublishedValue2
Pentode Plate to Triode Plate
0.1 pF
Capacitance;PublishedValue1
Pentode Plate to Triode Plate
0.02 pF
Capacitance;PublishedValue2

Characteristic

Plate Voltage
125 V
Characteristic;PublishedValue1
Plate Voltage
125 V
Characteristic;PublishedValue2
Grid-No2 Voltage
110 V
Characteristic
Grid-No.l Voltage
-1 V
Characteristic
Plate Resistance (Approx.)
0.2 megohm
Characteristic
Plate Current
13.5 mA
Characteristic;PublishedValue1
Plate Current
9.5 mA
Characteristic;PublishedValue2
Grid-No
2 mA
Characteristic;PublishedValue1
Grid-No
3.5 mA
Characteristic;PublishedValue2
Grid-No.l Voltage (Approx.) for plate current of
20 V
Characteristic;PublishedValue1
Grid-No.l Voltage (Approx.) for plate current of
-9 V
Characteristic;PublishedValue2
Grid-No.l Voltage (Approx.) for plate current of
-8 V
Characteristic;PublishedValue3
Transconductance
7500 uS
Section1
Amplification Factor
40
Section1

SECTION 2

Pentode

Other

Maximum Plate Voltage
330 V
Section2
Maximum Screen Voltage
330 V
Section2
Maximum Plate Dissipation
3 W
Section2
Maximum Screen Dissipation
0.55 W
Section2

Characteristic

Plate Resistance
200000 ohm
Section2
Transconductance
5000 uS
Section2