Tube-number record
GL-931-A
0 archive entries
GL-931-A is a tube type in the TubeDatabase archive (class: Multiplier Phototube). Recorded specifications: brand General Electric, construction Multi-section, socket Magnal, maximum plate voltage 1250 V, and maximum plate dissipation 0.5 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassMultiplier Phototube
BaseMagnal
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections11 electrodes (9 dynodes, 1 anode, 1 cathode)
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation0.5 W
Grid 2 Voltage250 V
Cathode Current2.5 mA
Audio Performance
Key Features
- Secondary emission multiplication
- High sensitivity
- Low noise level
- Low dark current
- Freedom from distortion
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 75V per stage | — | — | — | 30000 | — |
| 100V per stage | — | — | — | 200000 | — |
Application Notes
Very useful for relays and in applications involving low-light levels. This tube can multiply feeble currents by weak illuminations as much as 200,000 times.
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