6FJ7 — Compound (multi-section), Duodekal | TubeofileKnown Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
Similar dissimilar dual triode for vertical deflection but Noval base — not pin-compatible Similar dissimilar dual triode for vertical deflection but Noval base — not pin-compatible Electrical Specifications
Section 1 — Triode (Unit 1 — oscillator)
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)350V
Anode Dissipation (max)Anode Dissipation (max)1W
Typical Operating
Anode Voltage (typical)Anode Voltage (typical)250V
Grid 1 Bias VoltageGrid Bias Voltage-8V
Anode CurrentAnode Current8mA
Anode ResistanceAnode Resistance (approx.)9,000Ω
TransconductanceTransconductance
Capacitances
Grid-to-Plate CapacitanceGrid-to-Plate Capacitance3.8pF
Grid-to-Cathode CapacitanceInput Capacitance2.2pF
Anode-to-Cathode CapacitanceOutput Capacitance0.48pF
Section 2 — Triode (Unit 2 — amplifier)
Absolute Maximum
Anode Voltage (max)Anode Voltage (max DC)550V
Anode Dissipation (max)Anode Dissipation (max)10W
Typical Operating
Anode Voltage (typical)Anode Voltage (typical)150V
Grid 1 Bias VoltageGrid Bias Voltage-9.5V
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.9A
Notes
- Section 1 (vertical oscillator): Va max 350V, Pa max 1W, mu=22.5, gm=2500 umhos, Rp=9000Ω at Va=250V Vg=-8V Ia=8mA.
- Section 2 (vertical amplifier): Va max 550V (DC), Pa max 10W, Ik max 150mA peak / 50mA avg, mu=15.4, gm=7700 umhos, Rp=2000Ω at Va=150V Vg=-9.5V.
- 12-pin small-button Duodecar base (JEDEC E12-70), basing designation 12BM.
2.5mA/V
Amplification Factor (μ)Amplification Factor22.5—
Anode CurrentAnode Current
41mA
Anode ResistanceAnode Resistance (approx.)2,000Ω
TransconductanceTransconductance7.7mA/V
Amplification Factor (μ)Amplification Factor15.4—
Capacitances
Grid-to-Plate CapacitanceGrid-to-Plate Capacitance5pF
Grid-to-Cathode CapacitanceInput Capacitance4pF
Anode-to-Cathode CapacitanceOutput Capacitance0.54pF
No Internal Connection
4No Internal Connection (same as pin 2)