Tube-number record
32A8
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ClassHigh-Mu Triode, Power Pentode
BaseNoval (B9A)
Filament32 V @ 150 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesDesigned for transformer-less radio receivers
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation7 W
Grid 2 Voltage250 V
Cathode Current50 mA
H-C Voltage200 V
Audio Performance
Typical THD10%
Power Output1.05 W
Key Features
- Transformer-less radio receivers
- AF amplifier
- Output tube
- Noval 9-Pin base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit | 100 V | 2900 | — | 70 | 3.5 mA |
| Pentode Unit | 100 V | 6800 | 15000 | — | 26 mA |
Application Notes
The D.C. component of heater-cathode voltage must not exceed 100 volts when heater is positive with respect to cathode.
Datasheets
Datasheet: 32A8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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