TUBEOFILE
6AH6 — Small Signal Pentode, B7G | Tubeofile
← Browse RCA High quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
Known Equivalents & Substitutes
6F36 CV2521
Similar Tubes (Not Drop-In Compatible)
Brans lists as equivalent but 6AC7 is Octal base — not pin-compatible Similar sharp-cutoff pentode on B7G base but lower gm (5100 vs 9000 umhos) — different gain class European designation for similar sharp-cutoff RF pentode but different pinout Electrical Specifications
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 300V
Screen Voltage (max) Screen Voltage (max) 250V
Anode Dissipation (max) Anode Dissipation (max) 3.2W
Screen Dissipation (max) Screen Dissipation (max) 1.4W
Heater-to-Cathode Voltage (max)
Notes
Very high transconductance (9000 umhos) makes this tube ideal for wide-band video amplifiers and cascode RF stages. GE Essential Characteristics: Pa_max 3.2 W, Va_max 300 V, Vs_max 250 V, Va(typ) 250 V, Vs(typ) 150 V, Vg=-2V, Ia=10mA, Rp=10000, gm=9000. Sams substitution guide lists 6F36 and 10C14 as substitutes. Sharp-cutoff characteristic — not suitable for AGC-controlled stages (use remote-cutoff types like 6BA6 instead). Pin Layout — B7G
1 2 3 4 5 6 7
1 Anode
2 Screen Grid (g2)
3 Heater
4
Socket-Compatible Tubes ⚠ Not electrically compatible
Heater-to-Cathode Voltage (max)
100V
Typical Operating
Anode Voltage (typical) Anode Voltage (typical) 250V
Screen Voltage (typical) Screen Voltage (typical) 150V
Grid 1 Bias Voltage Grid 1 Bias Voltage -2V
Anode Current Anode Current 10mA
Anode Resistance Anode Resistance 10,000Ω
Transconductance Transconductance 9mA/V
Capacitances
Grid-to-Plate Capacitance Grid-to-Plate Capacitance 0.025pF
Input Capacitance Input Capacitance 6.5pF
Output Capacitance Output Capacitance 2.8pF
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 0.45A
Heater