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Voltage Triode Pentode ·Pentode-Triode

LZ319

Triode-pentode combination tube; available source material does not establish a narrower functional application confidently.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater: 9 V / 300 mA

Description

LZ319/PCF80 RF triode-pentode frequency changer for signal frequencies up to 250 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: B9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 9 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B9A - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.006 S
Amplification factor: 50
Max plate voltage: 250 V
Max screen voltage: 200 V
Max plate dissipation: 1.7 W
Max screen dissipation: 0.5 W
Max cathode current: 14 mA

RF pentode mixer system.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.005 S
Amplification factor: 20
Max plate voltage: 250 V
Max plate dissipation: 1.1 W
Max cathode current: 14 mA

Low-mu triode oscillator system.

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Pentode Grid-All Capacitance
4.5 pF
Pentode Anode-All Capacitance
4 pF
Pentode Anode-Grid Capacitance
0.02 pF
Frequency Changer Maximum Signal Frequency
250 MHz
Typical IF Frequency
34 MHz

SECTION 2

Triode

Other

Triode Grid-Cathode Capacitance
3 pF
Triode Anode-Cathode Capacitance
0.5 pF
Triode Anode-Grid Capacitance
2 pF
Typical Oscillator Voltage Minimum
2 V
Typical Oscillator Voltage Maximum
3 V