Tube-number record
DBC 21
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DBC 21 is a tube type in the TubeDatabase archive (class: Duodiode-triode). Recorded specifications: brand Philips, construction Triode, socket Rimlock, maximum plate voltage 135 V, and maximum plate dissipation 0.3 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassDuodiode-triode
BaseRimlock
Construction
Primary TypeTriode
EnvelopeGlass
Sections1 triode, 2 diodes
Filament / Heater
MaterialOxide-coated
Absolute Maximum Ratings
Plate Voltage135 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Operation (90V) | 90 V | 850 | 30000 | 25 | 1.4 mA |
| Static Operation (120V) | 120 V | 900 | 28000 | 25 | 1.6 mA |
Application Notes
Used as a detector and LF amplifier tube. Suitable for both resistance and transformer coupling. Designed for use with battery-operated radio sets, often followed by a DLL 21 balanced output stage.
Datasheets
Datasheet: DBC21.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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