5AV8

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

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9DZ
Socket code: B9A
Base pins: 9
Nominal heater: 4.7 V / 600 mA

Description

Miniature medium-mu triode and sharp-cutoff pentode contained in a nine-pin envelope.

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: 9DZ
Socket code: B9A
Base pins: 9
Nominal heater voltage: 4.7 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9DZ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1Pin 1	B	K — Cathode Original chart label: 2K; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN2Pin 2	B	G1 — Control Grid Original chart label: 2G1; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN3Pin 3	B	P — Plate (Anode) Original chart label: 2P; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN4Pin 4	—	H — Heater Original chart label: H; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN5Pin 5	—	H — Heater Original chart label: H; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN6Pin 6	A	G1 — Control Grid Original chart label: 1G1; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN7Pin 7	A	G3 — Suppressor GridGroup 9DZ7 Original chart label: 1G3; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN7Pin 7	A	K — CathodeGroup 9DZ7 Original chart label: 1K; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN7Pin 7	—	IS — Internal ScreenGroup 9DZ7 Original chart label: IS; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN8Pin 8	A	G2 — Screen Grid Original chart label: 1G2; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ
PIN9Pin 9	A	P — Plate (Anode) Original chart label: 1P; manufacturer verification pending	Unverified EIA Base Connections, printed page 132, 9DZ

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5750 Ω
Transconductance: 0.0033 S
Amplification factor: 19
Max plate voltage: 300 V
Max plate dissipation: 2.5 W

Published medium-mu triode Class A1 characteristics.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 300000 Ω
Transconductance: 0.0062 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2 W
Max screen dissipation: 0.5 W

Published sharp-cutoff pentode Class A1 characteristics.

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 2

Pentode

Characteristic

Heater Voltage . 4.7 Volts
4.7 V
Heater Voltage . 4.7 Volts
Heater Current . . 600 Ma
600 Ma
Heater Current . . 600 Ma
Grid No. 1 Voltage . . -6 Volts PRODUCTS INC.
-6 V
Grid No. 1 Voltage . . -6 Volts PRODUCTS INC.
Plate Current . 13 9.5 Ma RADIO TUBE DIVISION
9.5 Ma
Plate Current . 13 9.5 Ma RADIO TUBE DIVISION
Grid No. 2 Current . 2.8 Ma EMPORIUM, PA.
2.8 Ma
Grid No. 2 Current . 2.8 Ma EMPORIUM, PA.
Plate Resistance (approx.) . . 5750 300,000 Ohms Prepared and Released By The
300 Ohms
Plate Resistance (approx.) . . 5750 300,000 Ohms Prepared and Released By The
Grid No. 1 Voltage for I, = EMPORIUM, PENNSYLVANIA
1 V
Grid No. 1 Voltage for I, = EMPORIUM, PENNSYLVANIA

Other

Plate Voltage . . . . . 300 300 Volts Max.
300 V
Plate Voltage . . . . . 300 300 Volts Max.
Grid No. 2 Supply Voltage . 300 Volts Max.
300 V
Grid No. 2 Supply Voltage . 300 Volts Max.
Grid No. 2 Voltage . See Rating Chart
2 V
Grid No. 2 Voltage . See Rating Chart
Plate Dissipation . . 2.5 2.0 Watts Max.
2 W
Plate Dissipation . . 2.5 2.0 Watts Max.

Data set 02

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate supply voltage
200 V
ClassA1
Grid voltage
-6 V
ClassA1
Plate current
13 mA
ClassA1
Maximum fixed-bias grid circuit resistance
0.5 Mohm
Maximum cathode-bias grid circuit resistance
1 Mohm

Characteristic

Plate resistance
5750 ohm
ClassA1
Transconductance
3300 uS
ClassA1
Amplification factor
19
ClassA1
Grid-to-plate capacitance
1.5 pF
Grid-to-cathode and heater capacitance
2 pF
Plate-to-cathode and heater capacitance
0.34 pF
Heater warm-up time
11 s
ControlledWarmUp

SECTION 2

Pentode

Other

Plate supply voltage
200 V
ClassA1
Grid 2 supply voltage
150 V
ClassA1
Cathode resistor
180 ohm
ClassA1
Plate current
9.5 mA
ClassA1
Grid 2 current
2.8 mA
ClassA1
Maximum fixed-bias grid circuit resistance
0.25 Mohm
Maximum cathode-bias grid circuit resistance
1 Mohm

Characteristic

Plate resistance
300000 ohm
ClassA1
Transconductance
6200 uS
ClassA1
Grid 1 cutoff reference voltage
-8 V
ClassA1
Grid 1-to-plate capacitance
0.04 pF
Grid 1 input capacitance
7 pF
Plate output capacitance
3 pF