DIY Tube power supply

🔋 DIY Variable High Voltage Power Supply for Tube Projects

This versatile power supply kit is purpose-built for tube enthusiasts, offering three independent voltage rails to cover all your needs. One rail delivers up to 4A for tube heaters, ensuring clean, reliable power even in multi-tube builds. A second rail provides variable high voltage for your tube plates—up to 100mA—giving you solid, quiet power for preamps, compressors, and other audio circuits. A third, optional rail can be used to power relays, LEDs, or other accessories that bring your DIY project to life.

There’s a unique joy in building your own equipment—especially when it solves real-world problems elegantly. This power supply is flexible enough to fit a wide range of tube-based projects, from vintage-inspired audio gear to experimental circuits. It removes the guesswork from power delivery, making it easier than ever to bring your ideas to life with confidence and clarity.

⚠️ Transformer Requirements

To get the most from this kit, you’ll need a power transformer with a 9–12V secondary at 3A for the heater rail, and a second high-voltage winding capable of supplying at least 50mA—but not exceeding 220VAC to stay within the regulator’s safe range. With the right transformer, you’ll enjoy stable, efficient operation for years of reliable DIY fun.

📥 Downloads & Resources

• 🔧 Bill of Materials (BOM)
• 🧠 Schematic Diagram
• 🖼️ Top Screen
• 🖼️ Bottom Screen