Tube-number record
12AB5
0 archive entries
12AB5 is a tube type in the TubeDatabase archive (class: Beam Power Tube). Recorded specifications: brand RCA, construction Beam tetrode / beam power, socket Noval (B9A), maximum plate voltage 315 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassBeam Power Tube
BaseNoval (B9A)
Filament12.6 V @ 0.2 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesHeater-Voltage Range: 10 to 15.9 volts
Absolute Maximum Ratings
Plate Voltage315 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Cathode Bias) | 250 V | 4000 | 75000 | — | 33.5 mA |
| Class A Amplifier (Fixed Bias) | 250 V | 4100 | 50000 | — | 45 mA |
| Push-Pull Class AB1 Amplifier (Values for two tubes) | 250 V | — | — | — |
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