6CU7

Triode-hexode frequency converter with a remote-cutoff mixer section for gain-controlled superheterodyne front ends. The triode supplies local oscillation while the hexode performs controlled mixer action.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: OCTAL
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 230 mA

Description

Triode-hexode converter with remote-cutoff hexode section. The supplied Philips/JETEC/RTMA sheet was read for heater data, section ratings, characteristics, operating conditions, and capacitances, with repeated identical sections compressed only where the locked workflow allows.

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: OCTAL
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 230 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

OCTAL - 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

Hexode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.00075 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 1.5 W
Max screen dissipation: 0.3 W
Max cathode current: 7 mA

Conversion transconductance promoted.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0028 S
Amplification factor: 22
Max plate voltage: 175 V
Max plate dissipation: 0.8 W
Max cathode current: 6 mA

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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Hexode

Characteristics

Heater voltage
6.3 V
Heater current
230 mA
Conversion transconductance
750 uS
Plate voltage
250 V
Screen voltage
85 V
Plate current
3 mA
Plate resistance
1000000 ohm
Minimum

Capacitance

Input capacitance
4 pF

SECTION 2

Triode

Characteristics

Plate voltage
100 V
Plate current
10 mA
Transconductance
2800 uS
Amplification factor
22

Capacitance

Plate-grid capacitance
1.2 pF