Tube-number record
8489
0 archive entries
8489 is a tube type in the TubeDatabase archive (class: Triode-Pentode). Recorded specifications: brand TUNG-SOL, year 1963, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 330 V, and maximum plate dissipation 2.8 W. The archive does not yet hold a photographed example of this type.
BrandTUNG-SOL
ClassTriode-Pentode
BaseNoval (B9A)
Filament6.3 V @ 450 mA
Construction
Primary TypeMulti-section
EnvelopeT-6 1/2
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesCoated unipotential cathodes
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 150 V | 4500 | 4700 | 21 | 15 mA |
| Pentode Section | 125 V | 7000 | 170000 | — | 12 mA |
Application Notes
Leakage is minimized by use of special materials and processing; maintenance of characteristics is assured by special life tests.
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