Tube-number record
220B
0 archive entries
220B is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Western Electric, construction Triode, base Metal/Ceramic, socket Special / none, maximum plate voltage 12000 V, and maximum plate dissipation 10000 W. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassTriode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass with water-cooled metal anode
Base MaterialMetal/Ceramic
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics | 10000 V | 5000 | 8000 | 40 | 640 mA |
| Class A Audio Amplifier | 12000 V | — | — | 40 | 380 mA |
| Class C RF Power Amplifier | 10000 V | — | — | — | 1500 mA |
Application Notes
The tube should be mounted in a vertical position with the anode end down. Distilled water is recommended for cooling to prevent scale formation. Water flow rate should be not less than 3 gallons per minute and outlet temperature should not exceed 75° C. Provision should be made to limit initial filament current when cold.
Datasheets
Datasheet: 220B.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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