4264-A
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BrandStandard Valves
ClassTriode
BaseAmerican tapered small 4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Filament / Heater
MaterialOxide coated
Absolute Maximum Ratings
Plate Voltage100 V
Cathode Current2.8 mA
Audio Performance
Key Features
- Oxide coated filament
- Constant current type
- Direct filament heating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical (60V) | 60V | 623.9 | 11700 | 7.3 | 2.35mA |
| Typical (90V, -7V bias) | 90V | 562.5 | 12800 | 7.2 | 1.9mA |
| Typical (100V, -8V bias) | 100V | 580.6 | 12400 | 7.2 | 2.1mA |
| Typical (90V, -5.5V bias) | 90V | 637.2 | 11300 | 7.2 | 2.8mA |
| Typical (100V, -7V bias) | 100V | 631.6 | 11400 | 7.2 | 2.7mA |
Application Notes
Curves taken with direct filament heating; grid and anode voltages referred to the negative end of the filament.
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