Tube-number record
ACT28A
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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.
Absolute Maximum Ratings
Plate Voltage13000 V
Plate Dissipation1500 W
Cathode Current50000 mA
Audio Performance
Power Output300000 W
Key Features
- Forced-air cooled
- Disc seal
- Indirectly heated
- Oxide coated cathode
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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