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Voltage Radio Detector Converter ·Pentode-Triode

6CG8

Triode oscillator plus sharp-cutoff pentode mixer designed for television tuner frequency-converter service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

The Westinghouse 6CG8 combines a triode oscillator with a sharp-cutoff pentode mixer for television tuner service.

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: 6.3 V
Nominal heater current: 450 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

Plate resistance: 6900 Ω
Transconductance: 0.0058 S
Amplification factor: 40
Max plate voltage: 250 V
Max plate dissipation: 1.5 W

Published source values promoted where applicable.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 750000 Ω
Transconductance: 0.0046 S
Max plate voltage: 250 V
Max screen voltage: 150 V
Max plate dissipation: 2 W

Published source values promoted where applicable.

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

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater Voltage
6.3 V
Heater Current
450 mA
Plate Voltage
100 V
Cathode Bias Resistor
100 ohm
Amplification Factor
40 ratio
Plate Resistance
6900 ohm
Transconductance
5800 uS
Grid-Plate Capacitance
1.5 pF

Other

Typical Oscillator Frequency
250 MHz
Oscillator

SECTION 2

Pentode

Characteristics

Plate Voltage
250 V
Screen Voltage
150 V
Cathode Bias Resistor
200 ohm
Plate Resistance
750000 ohm
Transconductance
4600 uS
Grid-Plate Capacitance
0.016 pF
Shielded
Input Capacitance
5 pF
Shielded
Output Capacitance
1.6 pF
Shielded