5A/128B
0 Tubes in archive
BrandStandard Telephones and Cables (STC)
ClassR.F. Pentode
BaseStandard British 5-pin
Filament4V @ 1mA
Construction
Primary Typepentode
Envelopeglass
Sectionssingle
Filament / Heater
Heater NotesIndirectly-heated oxide-coated
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage100 V
Cathode Current9 mA
Audio Performance
Typical THD8.6%
Power Output0.315 W
Key Features
- Indirectly-heated
- Oxide-coated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Pentode Operation (Va 250) | 250V | 3000 | 800000 | - | 3.9mA |
| RF Pentode Operation (Va 200) | 200V | 3000 | 800000 | - | 3.8mA |
| RF Pentode Operation (Va 150) | 150V | 3000 | 800000 | - | 3.7mA |
Application Notes
RF Pentode designed for high frequency applications with low inter-electrode capacitance.
Sort by
Showing 1 to 0 of 0 results