Tube-number record
KD63
0 archive entries
KD63 is a tube type in the TubeDatabase archive (class: Voltage Reference Tube). Recorded specifications: brand Ferranti, year 1957, construction Diode, and socket Special / none. The archive does not yet hold a photographed example of this type.
BrandFerranti
ClassVoltage Reference Tube
BaseSpecial / none
Construction
Primary TypeDiode
EnvelopeSubminiature glass
Sections1
Filament / Heater
Absolute Maximum Ratings
Cathode Current2.5 mA
Audio Performance
Key Features
- Subminiature neon filled
- Rugged design
- Shock and vibration resistant
- High order of stability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Voltage Reference | 62 V | — | — | — | 1.1 mA |
Application Notes
Because of the constancy of ignition voltage this valve can readily be employed in voltage overload protection devices for instruments. For maximum stability the valve should be given a preliminary run of 15 minutes.
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