1.F.3.
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BrandMazda
ClassVariable-Mu R.F. Pentode
BaseB7G
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialGlass
SectionsSingle
Filament / Heater
MaterialDirectly heated
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage67.5 V
Cathode Current5.5 mA
Audio Performance
Key Features
- Directly heated
- Variable-Mu
- Battery operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 | 45V | 650 | 350000 | - | 1.6mA |
| Condition 2 | 67.5V | 950 | 250000 | - | 3.3mA |
| Condition 3 | 90V | 700 | 800000 | - | 1.7mA |
| Condition 4 | 90V | 970 | 500000 | - | 3.4mA |
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