220B
0 Tubes in archive
BrandWestern Electric
ClassTriode
BaseW. E. 128A
Construction
Primary TypeFilamentary water-cooled triode
EnvelopeGlass with water-cooled metal anode
Base MaterialMetal/Ceramic
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage12000 V
Plate Dissipation10000 W
Grid 1 Voltage-600 V
Cathode Current1500 mA
Audio Performance
Typical THD5%
Power Output545 W
Key Features
- Water-cooled
- Tungsten filament
- Vertical mounting only
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics | 10000V | 5000 | 8000 | 40 | 640mA |
| Class A Audio Amplifier | 12000V | - | - | 40 | 380mA |
| Class C RF Power Amplifier | 10000V | - | - | - | 1500mA |
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.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results