KK32

Directly heated variable-mu octode frequency changer for battery superheterodyne receivers covering medium, long, and short waves. Its controllable conversion characteristic supports receiver gain control while preserving economical filament consumption.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 2 V / 130 mA

Description

Battery variable-mu octode frequency changer for medium-, long-, and short-wave operation.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 2 V
Nominal heater current: 130 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

1 physical section, each with unique specifications.

Section 1

Octode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Octode frequency-changer 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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Octode

Characteristic

HeaterOrFilamentVoltage
2 V
HeaterOrFilamentCurrent
130 mA
Conversion Conductance
270 uA/V
MediumAndLongWave

Data set 02

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Octode

Other

Plate Voltage
90 V
MediumAndLongWave
Screen/Grid2 Voltage
90 V
MediumAndLongWave
Oscillator Injection RMS Voltage
8.5 V
Approximate

Characteristics

Conversion Transconductance
270 uS
Vg4=-0.5V