6BC5 — Sharp Cutoff Pentode, 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
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
Similar sharp-cutoff pentode on B7G base — slightly lower gm, Philips notes partial replacement 6AU6
Similar sharp-cutoff pentode on B7G base — Brans lists in same group (Table Va)Same sharp-cutoff pentode structure on B7G base — different Pa_max ratings (3W vs 2W) Electrical Specifications
Absolute Maximum
Anode Voltage (max)Max Plate Voltage300V
Screen Voltage (max)Max Screen Voltage150V
Anode Dissipation (max)Max Plate Dissipation3W
Typical Operating
Anode Voltage (typical)Plate Voltage250V
Notes
- GE Essential Characteristics: Va=250V, Vg2=150V, Vg=-8V, Ia=8mA, gm=5700 umhos, Rp=800kΩ, Pa_max=3W, Va_max=300V, Vg2_max=150V.
- Radiomuseum confirms 6CE5 is electrically identical to 6BC5.
- Philips interchange notes 6BA6/EF93 as partial replacement.
- Brans Vademecum (Table Va) lists with 6AU6, 12AU6, 3AU6, 6SH7 family.
Pin Layout — B7G
1Control Grid (g1)
2Cathode
3Heater
4
Socket-Compatible Tubes ⚠ Not electrically compatible
Screen Voltage (typical)Screen Voltage
150V
Grid 1 Bias VoltageGrid Voltage-8V
Anode CurrentPlate Current8mA
Anode ResistancePlate Resistance800,000Ω
TransconductanceTransconductance5.7mA/V
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.3A
Heater