Tube-number record
8528
0 archive entries
8528 is a tube type in the TubeDatabase archive (class: Beam-Power Pentode). Recorded specifications: brand Toshiba, construction Beam tetrode / beam power, base Ceramic, socket Subminiature, maximum plate voltage 165 V, and maximum plate dissipation 3.7 W. The archive does not yet hold a photographed example of this type.
BrandToshiba
ClassBeam-Power Pentode
BaseSubminiature
Filament6.3 V @ 450 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeMetal shell
Base MaterialCeramic
SectionsSingle
Filament / Heater
Heater NotesHeater-cathode type
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation3.7 W
Grid 2 Voltage155 V
Grid 1 Voltage-35 V
Cathode Current50 mA
H-C Voltage200 V
Audio Performance
Power Output1 W
Key Features
- Low plate supply voltage
- Industrial and military airborne equipment compatibility
- Severe shock and vibration resistant
- Maintains emission after long cutoff periods
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Audio Power Amplifier | 110 V | 4200 | 15000 | — | 30 mA |
Application Notes
Designed for use as an audio power amplifier with low plate supply voltages, suitable for airborne equipment.
Datasheets
Datasheet: 8528.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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