Tube-number record
3X12500A3
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3X12500A3 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Eimac, construction Triode, maximum plate voltage 6000 V, and maximum plate dissipation 12500 W. The archive does not yet hold a photographed example of this type.
BrandEimac
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeExternal Anode
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage6000 V
Plate Dissipation12500 W
Cathode Current8000 mA
Audio Performance
Key Features
- Medium-mu
- Forced-air cooled
- External anode
- Multi-unit design
- Thoriated tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class-C Grounded-Grid (110 Mc) | 3700 V | 80000 | — | 20 | 7400 mA |
| Class-C Grounded-Filament (3500V Operation) | 3500 V | — | — | 20 | 7200 mA |
| Class-C Grounded-Filament (4000V Operation) | 4000 V | — | — | 20 |
Application Notes
Specifically suitable for vhf region operation as well as lower frequencies. Designed for high power at low plate voltage.
Datasheets
Datasheet: 3X12500A3.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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