Nothing close enough? Start from a blank circuit diagram → Describe it in one paragraph.
How to use a circuit diagram template.
- 01Choose your tube and topology
Start by picking a vacuum tube (12AX7, EL34, 6L6GC, etc.) and a configuration like single‑ended or push‑pull. The tool pre‑loads common pinouts.
- 02Place components and connect
Drag resistors, capacitors, output transformers, and power supply elements onto the canvas. Wire them up with smart connectors that snap to tube pins.
- 03Annotate voltages and signal flow
Label B+ voltages, bias points, and signal paths. Add notes for cathode resistor values or negative‑feedback loops to match your build.
- 04Review the circuit carefully
Use the built‑in design‑rule checks to catch missing connections or incorrect polarities before finalizing your schematic.
- 05Export and share
Download your vacuum tube amplifier circuit diagram as a high‑resolution SVG, PNG, or PDF, or share a live link with your collaborators.
Questions about circuit diagram templates
What is a vacuum tube amplifier circuit diagram?
It’s a schematic that shows how vacuum tubes (valves) are connected with passive components to amplify audio signals. It includes power supply, biasing, and output stages.
Can I use these diagrams for a guitar amplifier build?
Absolutely. The examples cover popular guitar-amp tubes like 12AX7 preamps and 6L6GC or EL34 power stages. Just adapt the values to your desired tone.
How do I read tube pinouts in a schematic?
Each tube symbol includes numbered pins for heater, cathode, grid, and plate. The tool automatically labels them, and you can refer to the datasheet for exact assignments.
Is the circuit diagram maker free?
Yes, you can start creating diagrams for free. Sign up to save your work, unlock unlimited projects, and access premium templates.
Can I modify the example diagrams?
Yes, every schematic is a template. Click on any example to open it in the editor, then change components, tube types, or connections—it’s fully editable.