Tube-number record
10HF8
0 archive entries
10HF8 is a tube type in the TubeDatabase archive (class: Triode Pentode). Recorded specifications: brand Tung-Sol, year 1961, construction Other / special, base Small-button Noval 9-Pin, socket Noval (B9A), maximum plate voltage 430 V, and maximum plate dissipation 5 W. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassTriode Pentode
BaseNoval (B9A)
Filament10.5 V @ 0.45 mA
Construction
Primary TypeOther / special
EnvelopeGlass Bulb
Base MaterialSmall-button Noval 9-Pin
SectionsTriode-Pentode
Filament / Heater
Warm-up Time11s
Heater NotesAC or DC
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit - Class A1 Amplifier | 200 V | 4000 | 17500 | 70 | 4 mA |
| Pentode Unit - Class A1 Amplifier (Standard) | 200 V | 12500 | 75000 | — | 25 mA |
| Pentode Unit - Class A1 Amplifier (High Current) | 45 V | — | — | — |
Application Notes
The pentode unit is especially useful as a video output amplifier; the triode unit is useful in voltage-amplifier applications such as sync-separator, sync-clipper and phase-inverter circuits.
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