Tube-number record
18933
0 archive entries
18933 is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand Valvo, construction Dual triode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.
BrandValvo
ClassDouble Triode
BaseNoval (B9A)
Filament6.3 V @ 0.6 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesSeries or parallel operation
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 250 V | 2700 | 10000 | 27 | 6 mA |
Application Notes
Commonly used in industrial equipment and high-fidelity audio preamplifiers.
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