Tube-number record
ACT28A
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ACT28A is a tube type in the TubeDatabase archive (class: Pulse Oscillator Triode). Recorded specifications: brand Marconi, construction Triode, maximum plate voltage 13000 V, and maximum plate dissipation 1500 W. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassPulse Oscillator Triode
Filament16 V @ 7.3 mA
Construction
Primary TypeTriode
Envelopedisc seal
Sectionssingle
Filament / Heater
Materialoxide coated
Warm-up Time240s
Heater NotesThe heater must be on for four minutes before anode voltage is applied.
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| oscillator | 1500 V | 50000 | — | 45 | — |
Application Notes
Intended for use as an oscillator at frequencies up to 600Mc/s under pulsed or c.w. conditions. A pulse output of about 300kW per valve is attainable at 220Mc/s. Valve must be mounted vertically.
Datasheets
Datasheet: ACT28A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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