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All-in-One Custom Kits in stock now! Printed Circuit Boards and kits to match Tube CAD Journal circuit designs. Aikido kits.

Printed Circuit Boards and Kits
All boards are audio-grade PCBs: Double-sided, plated through holes, extra-thick board, 2oz-copper traces, clean solder mask and part location silk screening.

All printed circuit boards are expensively and lovingly made in USA

Attenuators and Signal Selecters
Attenuators and Signal Selecters
Stepped attenuator kits and audio signal switches. Staggered AC power switch.
Line Stage & Headphone Amplifiers
Line Stage & Headphone Amplifiers
Aikido, CCDA, and SRPP+ PCBs and kits. Buy just the PCB or add the items that you need to finish your project.
Phono Preamps
Phono Preamps
Aikido & Tetra Phono Stages are stereo tube phono preamps that uses two gain stages per channel and passive equalization in between.
Voltage Regulators
Voltage Regulators
New Solo high-voltage Janus and PS-2 regulator kits.
Capacitors and Sockets
Capacitors and Sockets
Coupling capacitors and tube sockets for your tube audio projects.
Printer Circuit Boards
Printer Circuit Boards
Blank PCBs with User Guides. Quantity discounts available.