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12AX7 Triode Preamp Schematic

Type Circuit schematicStandard IEEE Std 315 / ANSI Y32.2Engine schematex-circuitUpdated 7/11/2026
12AX7 Triode Preamp Schematic
Drawing preview
The request

“Draw a 12AX7 triode gain stage with a 1 V AC input, input coupling capacitor, 1 MΩ grid resistor, 250 V supply, 100 kΩ plate resistor, cathode resistor and bypass capacitor, output coupling capacitor, and 100 kΩ load.”

Then tryChange the plate resistor to 220 kΩ.Add a volume potentiometer at the output.
What is in this drawing

Read the decisions behind it.

01

Use netlist mode for clear signal flow

02

Include grid stopper resistor, grid leak resistor, plate load resistor, cathode bias resistor with bypass capacitor, and power supply decoupling

When designing or analyzing a single-ended triode voltage amplifier stage for audio applications.

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