Tube-number record
UCH81
0 archive entries
UCH81 is a tube type in the TubeDatabase archive (class: Triode-Heptode). Recorded specifications: brand Philips, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 1.7 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassTriode-Heptode
BaseNoval (B9A)
Filament19 V @ 100 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesIndirect by A.C. or D.C.; series supply
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Heptode section as mixer | 200 V | 775 | 1000000 | — | 3.7 mA |
| Heptode section as RF/IF amplifier | 200 V | 2400 | 600000 | — | 7.6 mA |
| Triode section characteristics | 100 V | 3700 | — | 22 |
Application Notes
Heptode section can be used without special precautions against microphonic effect in circuits where input voltage is >= 50mV for 50mW output.
Datasheets
Datasheet: UCH81.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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