6AF4 — Small Signal Triode, B7G | Tubeofile | Tubeofile
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← Browse Medium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.
Known Equivalents & Substitutes
6AF4A EC94
Similar Tubes (Not Drop-In Compatible)
2AF4
Same UHF triode with 2.34V heater — not interchangeable without heater change 3AF4
Same UHF triode with 3.15V heater — not interchangeable without heater change 6AN4
Similar UHF triode oscillator on B7G base — Sams lists as substitute Electrical Specifications
Absolute Maximum
Anode Voltage (max) Max Plate Voltage 150V
Anode Dissipation (max) Max Plate Dissipation 2.5W
Typical Operating
Anode Voltage (typical) Plate Voltage 80V
Anode Current Plate Current 13.5mA
Notes
GE Essential Characteristics classifies as UHF Triode Oscillator: Va=80V, Ia=13.5mA, gm=6500 umhos, Rp=2100 ohms, Pa_max=2.5W, Va_max=150V. Designed specifically for UHF TV tuner local oscillator use in the 470-890 MHz range. Sams Substitution Handbook lists 6AF4A, 6AN4, EC94, ECLL800 as substitutes. Muiderkring Handbook page 136 lists this type. Socket-Compatible Tubes ⚠ Not electrically compatible
Anode Resistance Plate Resistance
2,100Ω
Transconductance Transconductance 6.5mA/V
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 0.225A
Heater