KCH1

Directly heated triode-hexode frequency changer for battery superheterodyne receivers. The triode forms the local oscillator while the hexode performs mixing, combining both front-end functions in one low-consumption valve.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: P8A
Base pins: 8
Nominal heater: 2 V / 180 mA

Description

Directly heated triode-hexode frequency converter for battery superheterodyne receivers. Published ratings, characteristics, operating data, capacitances, microwave/noise data, or gauge-head data were retained according to the physical device and mapped only to compatible locked-schema fields.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: P8A
Base pins: 8
Nominal heater voltage: 2 V
Nominal heater current: 180 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

Hexode

X-ray radiationInterelectrode capacitances

Plate resistance: 700000 Ω
Transconductance: 0.00032 S
Max plate voltage: 135 V
Max screen voltage: 135 V
Max plate dissipation: 1.5 W
Max screen dissipation: 1 W
Max cathode current: 8 mA

Hexode mixer section; conversion transconductance promoted.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0013 S
Amplification factor: 28
Max plate voltage: 80 V
Max plate dissipation: 0.5 W

Triode oscillator section.

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 E-Z

Published operating points and test conditions from this source.

SECTION 1

Hexode

Characteristics

Plate voltage
90 V
Uncontrolled
Screen voltage
55 V
Uncontrolled
Plate current
1 mA
Uncontrolled
Conversion transconductance
320 uS
Uncontrolled
Plate resistance
700000 ohm
Uncontrolled

Other

Maximum plate voltage
135 V
Maximum plate dissipation
1.5 W
Maximum screen dissipation
1 W
Maximum cathode current
8 mA

SECTION 2

Triode

Characteristics

Triode transconductance at oscillation threshold
1300 uS
Triode amplification factor
28

Other

Maximum triode plate voltage
80 V
Maximum triode plate dissipation
0.5 W