This is a Morse Code Single Lever Paddle (CW Key) designed for amateur radio operation. It features an adjustable spring mechanism using standard ballpoint pen springs, allowing you to fine-tune the tension and tactile feedback.

Key Features:

• Simple Design: Consists of only two main 3D printable parts (Base and Arm).
• Support-Free Print: Optimized to print easily without any support material.
• Adjustable Tension: Uses 2x standard ballpoint pen springs. Tension is set by turning the M3 bolts.
• Hidden Wiring: Wires from the side contacts are routed through the body and run along V-shaped grooves at the bottom for a clean setup.
• Desktop Mounting: Includes three 4mm holes for bolting the key down to your desk or a heavy baseplate.

Required Hardware (BOM):

• Bolts: 3mm (M3) bolts for contacts and adjustment.
• Springs: 2x standard ballpoint pen springs (cut to length).
• Nuts: M3 nuts for securing contacts.
• Connector: 3.5mm stereo jack.

Check out my other Morse Key design:

If you prefer a simpler, no-hardware spring design (Print-in-Place), see my original S-Spring model here: 👉 Single Lever Paddle Morse CW Key - S-Spring Design