6J4 — Small Signal Triode, B7G | TubeofileKnown Equivalents & Substitutes
6J4WA6J4WEC98M8248CV1763CV5311
Similar Tubes (Not Drop-In Compatible)
6AF4
UHF triode on B7G base — similar application but different characteristicsMiniature double triode on B7G base for UHF — similar frequency range but dual section, different pinout Electrical Specifications
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)150V
Anode Dissipation (max)Anode Dissipation (max)2.25W
Typical Operating
Anode Voltage (typical)Anode Voltage (typical)150V
Anode CurrentAnode Current15mA
Notes
- Typical operating conditions at Va=150V: Ia=15mA, Rp=4500Ω, Gm=12000 umhos, mu=55.
- Maximum ratings: plate voltage 150V, plate dissipation 2.25W.
- The 6J4WA is the ruggedised military version. EC98 (Mullard) and M8248 are European equivalents.
- Designed specifically for grounded-grid RF amplifier service in VHF/UHF television tuners.
Anode ResistanceAnode Resistance
4,500Ω
TransconductanceTransconductance12mA/V
Amplification Factor (μ)Amplification Factor (μ)55—
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.4A
Heater