8403
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BrandEIMAC
ClassPlanar Triode
BaseCoaxial
Filament6.3V @ 1300mA
Construction
Primary TypeTriode
EnvelopeMetal/Ceramic
Base MaterialMetal
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated, unipotential cathode
Absolute Maximum Ratings
Plate Voltage2500 V
Plate Dissipation100 W
Grid 1 Voltage-150 V
Cathode Current150 mA
Audio Performance
Key Features
- Arc resistant cathode
- High emission capability
- Metal/ceramic construction
- High transconductance
- High mu
- Low interelectrode capacitances
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics | 1000V | 30000 | - | 80 | 160mA |
| Grounded Grid CW Oscillator | 900V | - | - | - | - |
| Grid Pulsed Oscillator | 2000V | - | - | - | 4000mA |
Application Notes
The design of the tube permits operation from low frequencies up to 3.0 GHz as a grid-pulsed, plate-pulsed, or CW oscillator, amplifier, or frequency multiplier.
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