Tube-number record
R 49
0 archive entries
R 49 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand La Radiotechnique, construction Pentode, socket Special / none, maximum plate voltage 225 V, and maximum plate dissipation 2.6 W. The archive does not yet hold a photographed example of this type.
BrandLa Radiotechnique
ClassPentode
BaseSpecial / none
Filament6.3 V @ 0.3 mA
Construction
Primary TypePentode
Sections1
Filament / Heater
Heater NotesIndirect heating (cathode isolated from filament)
Absolute Maximum Ratings
Plate Voltage225 V
Plate Dissipation2.6 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Voltage Amplifier | 200 V | 8500 | 500000 | 4250 | 10.5 mA |
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