Alternatives & variations Download PDF datasheet

OS12500

Indirectly heated transmitting pentode designed for radio-frequency power amplification and oscillator service. Its construction and ratings identify it as a dedicated RF generator/output tube.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: P8A
Base pins: 8
Nominal heater: 12.6 V / 900 mA

Description

Indirectly heated transmitting pentode for radio-frequency power amplification and oscillator service.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: P8A
Base pins: 8
Nominal heater voltage: 12.6 V
Nominal heater current: 900 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: 12000 Ω
Transconductance: 0.012 S
Max plate voltage: 500 V
Max screen voltage: 200 V
Max plate dissipation: 12 W
Max screen dissipation: 3.4 W

Published ratings and characteristics promoted from the approved source.

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

195X Tunsgram

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
12.6 V
Nominal
HeaterCurrentNominal
900 mA
Nominal
Maximum Plate Voltage
500 V
Maximum Screen Voltage
200 V
Maximum Plate Dissipation
12 W
Maximum Screen Dissipation
3.4 W

Characteristic

Transconductance
12000 µS
Typical
Plate Resistance
12000 ohm
Typical