30PL1
0 Tubes in archive
BrandMazda
ClassTriode-Output Beam Tetrode
BaseB9A
Filament13V @ 0.3mA
Construction
Primary TypeTriode-Output Beam Tetrode
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 | 200V | 3400 | 5300 | 18 | 10mA |
| Tetrode Section (Fixed Bias) | 170V | 6500 | - | - | 28mA |
| Tetrode Section (Self Bias) | 180V | 6500 | - | - | 28mA |
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.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results