Tube-number record
8121
0 archive entries
8121 is a tube type in the TubeDatabase archive (class: Beam Power Tube). Recorded specifications: brand RCA, year 1962, construction Beam tetrode / beam power, socket Magnal, maximum plate voltage 2200 V, and maximum plate dissipation 150 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassBeam Power Tube
BaseMagnal
Filament13.5 V @ 1.3 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeCeramic-Metal
Sections1
Filament / Heater
Heater NotesMinimum heating time: 60 seconds
Absolute Maximum Ratings
Plate Voltage2200 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Linear RF Power Amplifier SSB (Two-Tone) | 1500 V | — | 3800 | 12 | 160 mA |
| RF Power Amplifier Class C Telegraphy (470 Mc) | 1500 V | — | — | — | 300 mA |
Application Notes
For CCS operation at frequencies up to 500 Mc. Useful for single-sideband suppressed-carrier service and RF power amplification.
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