Tube-number record
CK6485
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CK6485 is a tube type in the TubeDatabase archive (class: Sharp cut-off pentode). Recorded specifications: brand Raytheon, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 300 V, and maximum plate dissipation 3.2 W. The archive does not yet hold a photographed example of this type.
BrandRaytheon
ClassSharp cut-off pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 450 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3.2 W
Grid 2 Voltage150 V
Cathode Current25 mA
Audio Performance
Key Features
- High transconductance
- Sharp cut-off
- Miniature construction
- Cathode interface resistance resistant
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Connected | 300 V | 9000 | 500000 | — | 10 mA |
| Triode Connected | 150 V | 11000 | 3600 | 40 | 12.5 mA |
Application Notes
Designed for use as a wide band or IF amplifier. It will maintain its emission and freedom from excessive cathode interface resistance even after long periods of operation under cut-off conditions.
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