6J4 — Small Signal Triode, B7G | Tubeofile | Tubeofile← BrowseData: HighHigh quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
Known Equivalents & Substitutes
6J4WA6J4WEC98M8248CV1763CV5311A2209A2209A
Similar Tubes (Not Drop-In Compatible)
UHF triode on B7G base — similar application but different characteristics Miniature 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.
Socket-Compatible Tubes ⚠ Not electrically compatible
Anode ResistanceAnode Resistance
4,500Ω
TransconductanceTransconductance12mA/V
Amplification Factor (μ)Amplification Factor (μ)55—
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.4A
Heater