3Z4
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BrandTHE FEDERATION OF JAPAN ELECTRIC COMMUNICATION INDUSTRIAL ASSOCIATIONS
ClassPower Amplifier Pentode
BaseMiniature Button 7 Pin
Construction
Primary TypePentode
EnvelopeT-5 1/4
Sections1
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage67.5 V
Cathode Current6 mA
Audio Performance
Typical THD12%
Power Output0.21 W
Key Features
- Miniature
- Directly Heated Cathode
- Battery Operated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Power Amplifier | 67.5V | 1450 | 100000 | - | 6.5mA |
Application Notes
JETEC release #1822, Jan. 7, 1957
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