1AF4
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BrandSylvania
ClassPentode
BaseMiniature Button 7-Pin
Construction
Primary TypePentode
EnvelopeT-5 1/2
SectionsSingle
Filament / Heater
Materialcoated
Absolute Maximum Ratings
Plate Voltage110 V
Grid 2 Voltage90 V
Cathode Current2.5 mA
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode - Condition 1 | 67.5V | 825 | 2000000 | - | 1.9mA |
| Pentode - Condition 2 | 90V | 950 | 1800000 | - | 1.65mA |
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