Tube-number record
TPO 921
0 archive entries
TPO 921 is a tube type in the TubeDatabase archive (class: Traveling Wave Tube). Recorded specifications: brand Compagnie Générale de T.S.F. (CSF), year 1957, construction Other / special, socket Octal, and maximum plate voltage 1100 V. The archive does not yet hold a photographed example of this type.
BrandCompagnie Générale de T.S.F. (CSF)
ClassTraveling Wave Tube
BaseOctal
Filament6.3 V @ 1.4 mA
Construction
Primary TypeOther / special
EnvelopeGlass/Metal
Sections1
Filament / Heater
Warm-up Time90s
Heater NotesCathode à oxydes à chauffage indirect
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier 3.8-4.2 GHz | 1000 V | — | — | — | 24 mA |
Application Notes
Broadband electronic tuning amplifier for the 3.8 to 4.2 GHz range. Designed for use in microwave relay links. Requires a safety relay for the helix (Ih < 5 mA).
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