3X2500A3
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BrandEimac
ClassMedium-Mu Triode
Construction
Primary TypeTriode
EnvelopeExternal Anode
Base MaterialCylindrical filament-stem
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation2500 W
Cathode Current2000 mA
Audio Performance
Key Features
- Forced-air cooled
- External-anode
- V.H.F. operation
- Grounded-grid terminal arrangement
- Low-inductance cylindrical filament-stem
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class-C Telegraphy (<50 Mc) | 3500V | 20000 | - | 20 | 1800mA |
| Class-C Telegraphy (<50 Mc) | 4000V | 20000 | - | 20 | 1600mA |
| Class-C Telegraphy (<50 Mc) | 5000V | 20000 | - | 20 | 2000mA |
| Class-C F-M Telephony (110 Mc Grounded-Grid) | 3700V | 20000 | - | 20 | 1800mA |
| Class-C F-M Telephony (110 Mc Grounded-Grid) | 4000V | 20000 | - | 20 | 1850mA |
Application Notes
The grid terminates in a ring between the plate and filament for grounded-grid amplifier convenience in coaxial circuits. Tool-less installation possible.
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