Tube-number record
RS 721
0 archive entries
RS 721 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Telefunken, year 1962, construction Triode, base Disk-seal, maximum plate voltage 10000 V, and maximum plate dissipation 15000 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeMetal-Ceramic
Base MaterialDisk-seal
Sections1
Filament / Heater
MaterialWolfram thoriert
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation15000 W
Audio Performance
Key Features
- Luftgekühlt
- Scheibenförmige Gitterdurchführung
- Direkt geheizt
- UKW-Sender
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier, Class B, f < 30 MHz | 10000 V | 24000 | — | 31.25 | 4100 mA |
| RF Amplifier, Class B, f = 100 MHz | 6000 V | 24000 | — | 31.25 | 3100 mA |
Application Notes
Except for the normal drive power, in grid-base circuits, the feed-through power (approx. 1.5 to 2 kW) must also be provided by the driver stage.
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