Tube-number record
18HB8
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18HB8 is a tube type in the TubeDatabase archive (class: Triode-Pentode). Recorded specifications: brand Sylvania, construction Multi-section, socket Noval (B9A), maximum plate voltage 150 V, and maximum plate dissipation 6.5 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassTriode-Pentode
BaseNoval (B9A)
Filament18 V @ 300 mA
Construction
Primary TypeMulti-section
EnvelopeT-6 1/2
Sections2
Filament / Heater
Heater NotesPin 4 should be closest to ground
Absolute Maximum Ratings
Plate Voltage150 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 115 V | 3900 | — | 74 | 2.5 mA |
| Pentode Section | 115 V | 6250 | 3500 | — | 33 mA |
Application Notes
Designed for audio applications in stereo and monaural sound equipment.
Datasheets
Datasheet: 18HB8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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