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Introduction

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

Build

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

Version

First try 2024-03-23

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

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J-Pole Antenna 70cm band

Model files

j-pole#1-Extension.stl

j-pole#1-Extension.stl

j-pole#1.3mf

j-pole#1.3mf

j-pole#1-Base.stl

j-pole#1-Base.stl

Model origin

License