Tube-number record
B 105
0 archive entries
B 105 is a tube type in the TubeDatabase archive (class: Receiver Triode, Low Frequency Power Amplifier). Recorded specifications: brand Philips, construction Triode, socket Special / none, and maximum plate voltage 120 V. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassReceiver Triode, Low Frequency Power Amplifier
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
MaterialDull emitter
Absolute Maximum Ratings
Plate Voltage120 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Amplifier | 120 V | 600 | 8300 | 5 | 12 mA |
| Detector | 40 V | — | — | — | — |
Application Notes
Requires a 1.5 volt dry cell with a series resistor of at least 6 ohms to set the correct filament voltage. Used in four-lamp receivers alongside 2 A 109 and 2 B 105 types.
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