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Voltage Radio Detector Converter ·Pentode-Triode

PCF803

Triode-pentode for television oscillator and mixer service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
8.5 V / 300 mA

Description

The Telefunken PCF803 is a remote-cutoff pentode-triode for television oscillator and mixer stages.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
8.5 V
Nominal heater current
300 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.009 S
Amplification factor
20

Oscillator triode.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
350000 Ω
Transconductance
0.001 S

Remote-cutoff mixer pentode.

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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Plate Voltage

    100 V

  • Plate Current

    15 mA

SECTION 2

Pentode

Characteristics

  • Plate Voltage

    170 V

  • Screen Voltage

    120 V

  • Plate Current

    10 mA