DCH11

Directly heated battery triode-hexode for superheterodyne frequency-changing service. The triode functions as local oscillator while the hexode provides mixing, with a low-consumption filament designed for portable battery radio receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.2 V / 75 mA

Description

The Telefunken DCH11 is a directly heated battery triode-hexode for controllable mixer and oscillator service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 1.2 V
Nominal heater current: 75 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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.001 S

Oscillator triode section.

Section 2

Hexode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω

Mixer hexode 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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Plate Voltage
90 V
Oscillation Transconductance
1000 uS

SECTION 2

Hexode

Characteristics

Plate Voltage
120 V
Screen Voltage
60 V
Conversion Transconductance
300 uS