6CK5

High-transconductance power pentode providing approximately 4.2 W single-ended Class A output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: OCTAL
Socket code: IO
Base pins: 9
Nominal heater: 6.3 V / 700 mA

Description

Power-amplifier 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: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 700 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 40000 Ω
Transconductance: 0.01 S
Amplification factor: 22
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 9 W
Max cathode current: 55 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
700 mA
Plate voltage
250 V
Screen voltage
250 V
Plate current
36 mA
Screen current
5.2 mA
Transconductance
10000 uS
Plate resistance
40000 ohm
Screen-grid amplification factor
22

Other

Maximum signal output power
4.2 W
ClassA

Capacitance

Input capacitance
10.2 pF
Output capacitance
7.8 pF
Plate-grid capacitance maximum
1 pF