Tube-number record
CBL1
0 archive entries
CBL1 is a tube type in the TubeDatabase archive (class: Double diode output pentode). Recorded specifications: brand Philips, construction Pentode, base Metal/Glass, socket Side-contact (P-base), maximum plate voltage 250 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassDouble diode output pentode
BaseSide-contact (P-base)
Filament44 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialMetal/Glass
SectionsTri-section (2 diodes, 1 pentode)
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; series supply
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 100 V | 6500 | 48000 | 14 | 21 mA |
| Class A | 200 V | 8000 | 40000 | 13.5 | 45 mA |
Application Notes
The tube should only be used with automatic or semi-automatic bias. In order to avoid excessive hum the gain between the detection diode and the pentode grid should not exceed 15.
Datasheets
Datasheet: CBL1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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