5A6

Directly heated power pentode designed for Class-B and Class-C RF amplification and frequency-multiplier service at frequencies up to approximately 100 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9L
Socket code: -
Base pins: 9
Nominal heater: 2.5 V / 460 mA

Description

Directly heated power pentode for Class-B and Class-C RF amplification and frequency-multiplier service up to about 100 MHz.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9L
Socket code: -
Base pins: 9
Nominal heater voltage: 2.5 V
Nominal heater current: 460 mA
Parallel heater voltage: 1.25 V
Parallel heater current: 920 mA
Series capable: Yes

9L - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1P	A	P — Plate (Anode) EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN3G3	A	G3 — Suppressor Grid EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN4F	—	F — Filament EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN5F	—	F — Filament EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN6G2	A	G2 — Screen Grid EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN7G1	A	G1 — Control Grid EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN8G3	A	G3 — Suppressor Grid EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L
PIN9FCT	—	FCT — Filament Center Tap EIA transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 130, 9L

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Amplification factor: 30
Max plate voltage: 150 V
Max screen voltage: 150 V
Max plate dissipation: 5 W
Max screen dissipation: 2 W
Max cathode current: 40 mA

Published electrical limits and characteristics promoted from the approved source; identical repeated sections compressed where applicable.

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

Beam Power

Other

Useful Power Output
3.1 W
ClassC;RFAmplifier;70MHz
OperatingFrequency
70 MHz
RFAmplifier

Data set 02

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

GRID TO PLATE: (G
0.15 ΜΜF
Capacitances | GRID TO PLATE: (G 1 TO P) MAX. 0.10 0.15 µµf

Other

MAXIMUM PLATE VOI TA GE
150 V
ClassC | MAXIMUM PLATE VOI TA GE 150 VOLTS
MAXIMUM NEGATIVE GRID M
75 V
ClassC | MAXIMUM NEGATIVE GRID M1 VOLTAGE —75 VOLTS
MAXIMUM PLATE DISSIPATION
5 W
ClassC | MAXIMUM PLATE DISSIPATION 5 WATTS
MAXIMUM GRID *
2 W
ClassC | MAXIMUM GRID *2 POWER INPUT 2 WATTS
MAXIMUM GRID Mi CURRENT
3 mA
ClassC | MAXIMUM GRID Mi CURRENT 3 MA.
DC GRID NS VOLTAGE —LS —Z
4 V
Typical Operating Conditions | DC GRID NS VOLTAGE —LS —Z4 VOLTS
PEAK RF GRID NS VOLTAGE Z
35 V
Typical Operating Conditions | PEAK RF GRID NS VOLTAGE Z3 35 VOLTS
DC
1.2 mA
Typical Operating Conditions | DC 6R ID ki CURRENT 1 1.2 MA.

Data set 03

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

HeaterVoltageNominal
2.5 V
Nominal
HeaterCurrentNominal
460 mA
Nominal
Maximum Plate Voltage
150 V
Maximum Screen Voltage
150 V
Maximum Plate Dissipation
5 W
Maximum Screen Dissipation
2 W
Maximum Cathode Current
40 mA
Maximum Frequency
100 MHz