Tube-number record
5U8
0 archive entries
5U8 is a tube type in the TubeDatabase archive (class: Triode Pentode). Recorded specifications: brand Tung-Sol, year 1962, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 330 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassTriode Pentode
BaseNoval (B9A)
Filament4.7 V @ 600 mA
Construction
Primary TypeMulti-section
EnvelopeT-6.5
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesHeater-Cathode Unipotential
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section Class A1 | 125 V | 7500 | — | 40 | 13.5 mA |
| Pentode Section Class A1 | 125 V | 5000 | 200000 | — | 9.5 mA |
Application Notes
Specifically designed for local oscillator-pentode mixer applications in FM or TV receivers.
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