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J-Pole Antenna 70cm band
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This is a 70cm J-Pole antenna printed in plastic and dressed with copper foil. Dimensioned for centre frequency 435 MHz.
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Updated at source:
Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution
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.