GL-921
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BrandGeneral Electric
ClassPhototube
BaseCartridge
Construction
Primary TypeGas-filled
Sections2-electrode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage90 V
Audio Performance
Key Features
- Cartridge-type
- Gas-filled
- Highly sensitive to red and infrared radiation
- Double-ended design
- Compact
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Relay and Light-Measurement | 90V | - | - | - | - |
Application Notes
The GL-921 is a cartridge-type, two-electrode gas-filled phototube for relay- and light-measurement applications. It is useful in applications where space is restricted.
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