9U8A

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: 9.45 V / 300 mA

Description

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

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: 9.45 V
Nominal heater current: 300 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

Promoted from published ratings/characteristics where directly applicable; additional published values retained in TUBE_SECTION_PARAMETER.

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

Promoted from published ratings/characteristics where directly applicable; additional published values retained in TUBE_SECTION_PARAMETER.

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

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