Tube-number record
CK7979
0 archive entries
CK7979 is a tube type in the TubeDatabase archive (class: Gas Triode). Recorded specifications: brand Raytheon, construction Triode, socket Subminiature, and maximum plate voltage 118 V. The archive does not yet hold a photographed example of this type.
BrandRaytheon
ClassGas Triode
BaseSubminiature
Construction
Primary TypeTriode
EnvelopeT-2 Glass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage118 V
Grid 1 Voltage-12 V
Cathode Current3 mA
Audio Performance
Key Features
- Subminiature construction
- Neon filled
- Directly heated cathode
- Indicator lamp
- Low current negative grid control device
- Suitable for transistor circuitry
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| DC Operation (Fig. A) | 80 V | — | 33000 | — | 0.6 mA |
| AC Operation (Fig. B) | 65 V | — | 10000 | — | 1.9 mA |
| AC Operation (Fig. C) | 65 V | — | 33000 | — | 0.67 mA |
Application Notes
The low working and control voltages permit its use in association with transistor circuitry. Light output is several times greater than a NE-2 glow lamp when using AC supply.
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