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Voltage Pentode or Tetrode (under 100V) ·Tetrode

LV5

Telefunken space-charge-grid tetrode for special low-voltage operation, with its internal space-charge grid tied to the screen grid.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 200 mA

Description

Telefunken LV5 is a tetrode with an internal space-charge grid tied to the screen grid, intended for special-purpose low-voltage operation.

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
200 mA
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

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.0033 S
Amplification factor
10
Max plate voltage
20 V
Max screen voltage
20 V
Max plate dissipation
1 W
Max screen dissipation
0.4 W
Max cathode current
35 mA

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

194X Wehrmacht Rohren

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Heater current range

    180 mA to 220 mA

    Published range

  • Plate voltage

    20 V

    Normal operating point

  • Plate current

    7 mA

    Normal operating point

  • Space-charge/screen current

    11 mA

    Normal operating point

Capacitance

  • Input capacitance

    7.4 pF

  • Output capacitance

    4.3 pF

  • Grid-plate capacitance

    0.75 pF