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Voltage Dual Pentode ·Pentode-Pentode

LV4

Matched push-pull dual pentode for broadband receiving and externally driven low-power transmitting stages, combining two RF sections with a common cathode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / -

Description

Telefunken LV4 contains two matched push-pull pentode systems in one envelope with a common cathode, optimized for broadband receiving and usable in externally driven low-power transmitter stages.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
12.6 V
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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
Plate resistance
300000 Ω
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
3 W
Max screen dissipation
0.6 W
Max cathode current
25 mA

Published ratings and characteristics were promoted when unambiguous; additional operating values are preserved in TUBE_SECTION_PARAMETER.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
300000 Ω
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
3 W
Max screen dissipation
0.6 W
Max cathode current
25 mA

Second physical pentode section; added to align rows with SectionCount.

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

194X Wehrmacht Rohren

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater current range

    250 mA to 300 mA

    Published range; no single nominal current stated

  • Plate current per system

    10 mA

    Ua=250 V; Ug2=200 V

Capacitance

  • Push-pull input capacitance

    8.1 pF

  • Push-pull output capacitance

    11.5 pF

Characteristic

  • Transconductance

    5.3 to 8.5 mA/V

    HF receiving operation; published approximate range