DET23

Indirectly heated disc-seal UHF triode for Class-A common-grid coaxial amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 400 mA

Description

The Marconi DET23 is a indirectly heated disc-seal uhf triode for class-a common-grid coaxial amplifier 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: 6.3 V
Nominal heater current: 400 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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.007 S
Amplification factor: 70
Max plate voltage: 350 V
Max plate dissipation: 5 W

Highest reliable published rating promoted; remaining microwave/RF operating data retained as parameters. Marconi DET23 indirectly heated disc-seal Class A UHF triode for common-grid coaxial amplification. Maximum plate voltage 350 V, plate dissipation 5 W; published transconductance 7 mA/V at 250 V plate and 10 mA plate current, amplification factor 70. Anode seal temperature must not exceed 140°C and requires adequate thermal contact.

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater/filament voltage
6.3 V
Maximum plate dissipation
5 W

Characteristic

Amplification factor
70

Capacitance

Grid-plate capacitance
-
Plate-cathode capacitance
2.2 pF
Grid-cathode capacitance
-