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Voltage Radio Detector Converter ·Pentode-Triode

XCF801

Medium-mu triode plus sharp-cutoff pentode designed for combined oscillator and mixer service in television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9QA
Socket code
B9A
Base pins
9
Nominal heater
4.1 V / 600 mA

Description

Medium-mu triode and sharp-cutoff pentode for combined oscillator and mixer service in television receivers.

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
9QA
Socket code
B9A
Base pins
9
Nominal heater voltage
4.1 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9QA - 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
Max plate voltage
140 V
Max plate dissipation
1.8 W
Max cathode current
22 mA

Promoted from published maximum-ratings/characteristics tables; additional source values are retained in TUBE_SECTION_PARAMETER.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
350000 Ω
Transconductance
0.011 S
Max plate voltage
275 V
Max screen voltage
275 V
Max plate dissipation
2.4 W
Max screen dissipation
0.55 W
Max cathode current
20 mA

Promoted from published maximum-ratings/characteristics tables; additional source values are retained 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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Plate voltage

    100 V

    ClassA

  • Grid No.1 voltage

    -3 V

    ClassA

  • Plate current

    15 mA

    ClassA

Other

  • Plate supply voltage

    600 V

SECTION 2

Pentode

Characteristic

  • Plate voltage

    170 V

    ClassA

  • Screen-grid voltage

    120 V

    ClassA

  • Grid No.1 voltage

    -1.2 V

    ClassA

  • Plate current

    10 mA

    ClassA

  • Screen-grid current

    3 mA

    ClassA

Other

  • Plate supply voltage

    600 V

  • Screen-grid supply voltage

    600 V