DF961

Battery pentode designed for high-frequency amplification. Its low-power construction supports RF signal stages in portable battery-operated equipment where heater consumption must be minimized.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.2 V / 60 mA

Description

Battery pentode for high-frequency amplification.

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: 1.2 V
Nominal heater current: 60 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: 250000 Ω
Transconductance: 0.00085 S
Max plate voltage: 90 V
Max screen voltage: 67.5 V
Max plate dissipation: 0.35 W
Max screen dissipation: 0.12 W
Max cathode current: 6 mA

Published ratings and characteristics promoted from the printed technical data.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
1.2 V
Nominal
HeaterCurrentNominal
60 mA
Nominal
Maximum Plate Voltage
90 V
Maximum Screen Voltage
67.5 V
Maximum Plate Dissipation
0.35 W
Maximum Screen Dissipation
0.12 W
Maximum Cathode Current
6 mA