Tube-number record
3-500Z
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BrandEIMAC
ClassHigh-Mu Power Triode
Base5-pin
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMetal/Glass
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation500 W
Cathode Current400 mA
Audio Performance
Power Output1420 W
Key Features
- Zero-bias operation
- Compact power triode
- Cathode-driven (grounded-grid) operation
- High-mu
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB2 RF Linear Amplifier (Cathode Driven) | 2500 V | — | — | 130 | 400 mA |
| Class AB2 RF Linear Amplifier (Cathode Driven) | 3000 V | — | — | 130 | 400 mA |
| Class C RF Power Amplifier (Grid Driven) | 3000 V | — | — | — |
Application Notes
The EIMAC 3-500Z is a compact power triode intended for zero-bias Class-AB2 amplifier service in audio or radio-frequency applications. Forced-air cooling is required.
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