Voltage - Triode (single high frequency) ·Triode
Indirectly heated disc-seal triode for common-grid coaxial VHF/UHF oscillator and power-amplifier service.
The Marconi DET22 is a indirectly heated disc-seal triode for common-grid coaxial vhf/uhf oscillator and power-amplifier service.
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Highest reliable published rating promoted; remaining microwave/RF operating data retained as parameters. Marconi DET22 indirectly heated disc-seal VHF/UHF triode for common-grid coaxial oscillator or power-amplifier operation. Maximum plate voltage 350 V, dissipation 10 W; peak anode current 150 mA is a pulse-specific limit, not unrestricted DC cathode current. Transconductance 6 mA/V at 250 V plate, 20 mA plate current. Anode seal temperature must not exceed 140°C.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Heater/filament voltage
6.3 V
Maximum/service frequency
3000 MHz
Focusing/service wavelength minimum
7 cm
Focusing/service wavelength maximum
30 cm
Maximum anode seal temperature
140 C
Heater voltage
6.3 V
Primary application
Common-grid coaxial oscillator and power amplifier
Construction
Disc-seal triode