Tube-number record
866A
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BrandRaytheon
ClassMercury Vapor Rectifier
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeHalf-Wave
EnvelopeGlass
SectionsSingle
Filament / Heater
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage10000 V
Cathode Current250 mA
Audio Performance
Key Features
- Shielded filament
- High voltage
- Mercury vapor
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single-phase Full-Wave Choke Input | 3535 V | — | — | — | 500 mA |
| Single-phase Full-Wave Choke Input | 3000 V | — | — | — | 500 mA |
Application Notes
The tube should always be mounted vertically with the top cap up. Filament should be burned for 15 minutes before plate voltage is applied to a new tube.
Datasheets
Datasheet: 866A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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