Tube-number record
9A8/PCF80
0 archive entries
9A8/PCF80 is a tube type in the TubeDatabase archive (class: Medium-mu triode — Sharp-cutoff pentode). Recorded specifications: brand RCA, construction Multi-section, 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.
BrandRCA
ClassMedium-mu triode — Sharp-cutoff pentode
BaseNoval (B9A)
Filament9 V @ 0.3 mA
Construction
Primary TypeMulti-section
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation1.7 W
Grid 2 Voltage175 V
Cathode Current14 mA
H-C Voltage200 V
Audio Performance
Key Features
- Miniature type
- Combined oscillator and mixer
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 100 V | 5000 | — | 20 | 14 mA |
| Pentode Section | 170 V | 6200 | 400000 | 47 | 10 mA |
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