Tube-number record
8877/3CX1500A7
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BrandEIMAC
ClassPower Triode
Base7-pin (non-miniature)
Filament5 V @ 10.5 mA
Construction
Primary TypeTriode
EnvelopeCeramic/Metal
Base MaterialMetal/Ceramic
Sections1
Filament / Heater
MaterialOxide Coated
Warm-up Time90s
Heater NotesUnipotential cathode
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation1500 W
Cathode Current1000 mA
Audio Performance
Power Output2075 W
Key Features
- Rugged ceramic/metal construction
- High-mu power triode
- Cathode driven
- Low intermodulation characteristics
- UHF band capable
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Linear Amplifier Class AB2 Cathode Driven | 2700 V | 55000 | — | 200 | 740 mA |
| RF Linear Amplifier Class AB2 Cathode Driven (High Voltage) | 3500 V | 55000 | — | 200 | 1000 mA |
| Class AB2 Cathode Driven 220 MHz | 2500 V | — | — | — | 1000 mA |
| Class B Cathode Driven 88-108 MHz | 4000 V | — | — | — | 1000 mA |
Application Notes
Designed for use as a cathode driven Class AB2 or Class B amplifier in audio or RF applications, or as a cathode driven plate modulated Class C RF amplifier.
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