6AH4 — Power Triode, Octal | 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
6AH4GT
Electrical Specifications
Absolute Maximum
Anode Voltage (max)Max Plate Voltage500V
Peak Anode Voltage (max)Max Peak Positive Plate Voltage2,000V
Anode Dissipation (max)Max Plate Dissipation7.5W
Cathode Current (max)Max Average Cathode Current60mA
Heater-to-Cathode Voltage (max)
Notes
- Tung-Sol datasheet (1952, tentative data): Two operating points given — Va=250V/Vg=-23V/Ia=30mA and Va=250V/Vg=-33V/Ia=5mA. Typical characteristics at 30mA point: gm=4500 µmhos, mu=8, ra=1780Ω.
- Maximum ratings per RMA Standard MS-210 for vertical deflection amplifier service (525-line, 30-frame TV system).
- Maximum peak positive plate voltage of 2000V; voltage pulse must not exceed 15% of one scanning cycle.
- Maximum grid circuit resistance 2.2 MΩ; adequate bias resistor required to protect tube when excitation is absent.
- MIL-HDBK-213A lists as 6AH4GT, class: receiving triode.
- Muiderkring handbook lists on page 138, type classification: triode.
- Grid voltage for 0.5mA plate current (approx.) is -40V.
Pin Layout — Octal
1No Connection
2Heater
3Plate
4
Socket-Compatible Tubes ⚠ Not electrically compatible
Max Heater-Cathode Voltage (DC and peak)
200V
Max Grid ResistorMax Grid Circuit Resistance2.2MΩ
Typical Operating
Anode Voltage (typical)Plate Voltage250V
Grid 1 Bias VoltageGrid Voltage-23V
Anode CurrentPlate Current30mA
Anode ResistancePlate Resistance1,780Ω
TransconductanceTransconductance4.5mA/V
Amplification Factor (μ)Amplification Factor8—
Capacitances
Grid-to-Plate CapacitanceGrid-to-Plate Capacitance4.4pF
Grid-to-Cathode CapacitanceInput Capacitance (Grid to Heater+Cathode)7pF
Anode-to-Cathode CapacitanceOutput Capacitance (Plate to Heater+Cathode)1.7pF
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.75A
Grid