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Voltage Radio Detector Converter ·Diode-Pentode

6CT7

Single detector diode combined with a remote-cutoff RF pentode for receiver radio-frequency amplification and detection.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
OCTAL
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 300 mA

Description

Single-diode remote-cutoff RF pentode. 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

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
OCTAL
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
300 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1400000 Ω
Transconductance
0.002 S
Amplification factor
18
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
2 W
Max screen dissipation
0.3 W
Max cathode current
10 mA

Section 2

Diode

X-ray radiationInterelectrode capacitances
Max plate voltage
200 V
Rectifier nominal output current
0.8 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

Pentode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Plate voltage

    250 V

  • Screen voltage

    85 V

  • Plate current

    5 mA

  • Screen current

    1.5 mA

  • Grid voltage

    -2 V

  • Transconductance

    2000 uS

  • Plate resistance

    1.4 Mohm

  • Screen-grid amplification factor

    18

SECTION 2

Diode

Other

  • Maximum diode plate voltage

    200 V

  • Maximum diode current

    0.8 mA

Capacitance

  • Diode plate-cathode capacitance

    3.8 pF