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Voltage Pentode - High Frequency (single) ·Pentode

MF2

Directly heated Telefunken battery pentode for high-frequency amplification in portable radio equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.9 V / 180 mA

Description

Telefunken MF2 directly heated high-frequency pentode with published maximum ratings and normal RF operating characteristics.

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
1.9 V
Nominal heater current
180 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1000000 Ω
Transconductance
0.000875 S
Max plate voltage
200 V
Max screen voltage
150 V
Max plate dissipation
1.5 W
Max screen dissipation
0.5 W
Max cathode current
6 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

Pentode

Capacitance

  • Input capacitance

    4.5 pF

  • Output capacitance

    9.9 pF

Other

  • Plate voltage

    120 V

    Normal operating point

  • Screen voltage

    80 V

    Normal operating point

  • Plate current

    2.5 mA

    Normal operating point