Tube-number record
264/8576
0 archive entries
264/8576 is a tube type in the TubeDatabase archive (class: Radial Beam Power Pentode). Recorded specifications: brand EIMAC, construction Pentode, socket 7-pin (non-miniature), maximum plate voltage 5000 V, and maximum plate dissipation 3000 W. The archive does not yet hold a photographed example of this type.
BrandEIMAC
ClassRadial Beam Power Pentode
Base7-pin (non-miniature)
Filament6 V @ 17000 mA
Construction
Primary TypePentode
EnvelopeCeramic/Metal
SectionsSingle
Filament / Heater
MaterialOxide Coated, Unipotential
Warm-up Time5s
Heater NotesVoltage tolerance +/- 0.3V
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation3000 W
Grid 2 Voltage1000 V
Grid 1 Voltage-250 V
Cathode Current2000 mA
Audio Performance
Power Output5500 W
Key Features
- Ceramic/Metal Construction
- Forced-air cooled
- Radial beam power pentode
- Very low input capacitance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB1, Peak Envelope (Condition 1) | 4000 V | 37000 | 1350 | — | 1430 mA |
| Class AB1, Peak Envelope (Condition 2) | 5000 V | 37000 | 1950 | — | 1360 mA |
| Class AB1, Peak Envelope (Condition 3) | 5000 V | 37000 | 1550 | — | 1690 mA |
Application Notes
Well suited for use in broad-band linear amplifiers or in high-performance Class AB1 amplifier applications. Requires forced-air cooling in all applications.
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