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Retractable yagi antenna parts

by Balua, published

Retractable yagi antenna parts by Balua Mar 10, 2014
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Summary

Yagi antenna support parts.

These parts were designed to be used with measuring tape as the radiating elements. Both the reflector and directors use the same part while the Driven Element has a special part for itself.

The size of the elements and spacing was based on this schematic for 433MHz:
http://www.instructables.com/files/orig/F8H/ZM28/H8XM1W8R/F8HZM28H8XM1W8R.jpg

It was also tested and verified. Check instructions for more information.

Instructions

These parts were printed in a Makerbot 2X with ABS in the lowest settings, with 10% of infill and 3 shells. Also we made it without raft.

The parts are easily tightened to the boom with zip ties. We also add the SW designs in case anyone wants to adapt it to his own boom size.

The are 2 holes on each side off the parts that allow do screw fit the measuring tape. The humps in the corners stop the elements from rotating when it is stretched.

The Driven Element part has a central column that divides the wiring for each side. it also has a small hole that allows the cable to be zip tied against the boom in order to guarantee that everything stays correctly locked.

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