Tube-number record
RS 391
0 archive entries
RS 391 is a tube type in the TubeDatabase archive (class: Transmitting Pentode). Recorded specifications: brand Telefunken, construction Pentode, socket Special / none, maximum plate voltage 1500 V, and maximum plate dissipation 110 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassTransmitting Pentode
BaseSpecial / none
Filament12.6 V @ 1.3 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide cathode
Absolute Maximum Ratings
Plate Voltage1500 V
Plate Dissipation110 W
Grid 2 Voltage450 V
Grid 1 Voltage-450 V
Cathode Current175 mA
H-C Voltage100 V
Audio Performance
Power Output100 W
Key Features
- 100 Watt-Sendepentode
- Oxyd-Kathode
- Grid Voltage Modulation
- Suppressor Grid Modulation
- Plate Voltage Modulation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier | 1000 V | 4500 | — | 90 | 100 mA |
| Suppressor Grid Modulation (Carrier) | 1500 V | — | — | — | 15 mA |
Application Notes
A series resistor (min 3000 Ohms) is required in the screen grid circuit to prevent overloading.
Datasheets
Datasheet: RS391.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results