J-Pole Antenna 70cm band

Introduction

The antenna design is described here: 3d-print-j-pole.

Build

1. Print the two parts with support
2. Glue parts together
3. Dress with 10mm copper foil as in photos
4. Connect coaxial cable 17 mm up from bottom metal
5. Make 3 turns on cable to as an ugly choke
6. Add connector
7. Tuning with NanoVNA : add and remove foil until center frequency is in middle with good VSWR.

Version

1. First try 2024-03-23

TODO: Antenna mount - ask me if you want me to add one.