Tube-number record
3X100A5
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BrandEitel-McCullough, Inc. (Eimac)
ClassHigh-Mu Transmitting Triode
BaseCoaxial
Filament6.3 V @ 1025 mA
Construction
Primary TypeTriode
EnvelopePlanar Metal-to-Glass
Base MaterialMetal
Sections1
Filament / Heater
MaterialOxide-Coated
Warm-up Time60s
Heater NotesHeater voltage depends on frequency; varies from 6.3V (up to 400 Mc) down to 4.5V (2000 Mc and above).
Absolute Maximum Ratings
Plate Voltage1000 V
Plate Dissipation100 W
Grid 1 Voltage-400 V
Cathode Current125 mA
Audio Performance
Key Features
- Planar construction
- VHF/UHF range
- Forced air cooling
- High-mu
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier (500 Mc) | 600 V | 25000 | — | 100 | 80 mA |
| RF Oscillator (2500 Mc) | 900 V | — | — | — | 90 mA |
| Plate-Modulated RF Amplifier (500 Mc) | 600 V | — | — | — |
Application Notes
Physically and electrically identical to the Eimac 2C39A but with additional production tests for long-pulse cathode evaluation.
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