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6BC5 — Sharp Cutoff Pentode, B7G | Tubeofile
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6BC5
Sharp Cutoff Pentode — B7G
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RCA
↗ Radiomuseum
Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
6AG5
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)
6CE5
Same sharp-cutoff pentode structure on B7G base — different Pa_max ratings (3W vs 2W)
Electrical Specifications
Absolute Maximum
Anode Voltage (max)
Max Plate Voltage
300
V
Screen Voltage (max)
Max Screen Voltage
150
V
Anode Dissipation (max)
Max Plate Dissipation
3
W
Typical Operating
Anode Voltage (typical)
Plate Voltage
250
V
Screen Voltage (typical)
Screen Voltage
150
V
Grid 1 Bias Voltage
Grid Voltage
-8
V
Anode Current
Plate Current
8
mA
Anode Resistance
Plate Resistance
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.3
A
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
1
2
3
4
5
6
7
1
Control Grid (g1)
2
Cathode
3
Heater
4
Socket-Compatible Tubes
⚠ Not electrically compatible
6BM5
6BY6
6CE5
6CS6
PL95
References
https://frank.pocnet.net/sheets/049/6/6BC5.pdf
https://frank.pocnet.net/sheets/127/6/6BC5.pdf
800,000
Ω
Transconductance
Transconductance
5.7
mA/V
Heater
5
Plate
6
Screen Grid (g2)
7
Suppressor Grid (g3)