Tube-number record
30PL1
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BrandMazda
ClassTriode-Output Beam Tetrode
BaseNoval (B9A)
Filament13 V @ 0.3 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass
SectionsDual (separate cathodes)
Filament / Heater
Heater NotesIndirectly heated for series operation
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation5.5 W
Grid 2 Voltage250 V
H-C Voltage150 V
Audio Performance
Typical THD5%
Power Output2.35 W
Key Features
- Dual type (Triode and Output Beam Tetrode)
- Individual cathodes for each section
- Suitable for Audio Amplifier or Frame Time-Base stages
- Designed for AC/DC mains series heater chains
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 200 V | 3400 | 5300 | 18 | 10 mA |
| Tetrode Section (Fixed Bias) | 170 V | 6500 | — | — | 28 mA |
| Tetrode Section (Self Bias) | 180 V | 6500 | — | — | 28 mA |
Application Notes
The total anode dissipation of both sections must not exceed 6 watts. The grid to cathode circuit resistance of the tetrode must not exceed 0.5 megohms with cathode self-bias at max rating.
Datasheets
Datasheet: 30PL1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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