If you attended Field Day 2022, you may have been one of the students that learned how to build an end fed halfwave Antenna and actually got to build one and take it home. For those that were not able to do so, this page is for you. Building antennas is a fun learning experience for any ham operator and one that will serve you well for many years. Knowing how to build an antenna also saves you a bit of money from buying the commercial ones online that can range from $40 up to $180.
It is just an overall good skill to have under your belt.
As promised in the class, I am making the build details available to you if you so choose to build one. They are not hard to assemble and with a few minor skills you are going to end up with a very nice antenna.
Living in a hot climate area like Texas, things tend to melt. I highly suggest that if you are going to 3D print this, that you use Tough PLA. It is rigid and heat resistant. That last thing you want is for the SO-239 to fall off your antenna while operating. I used 100% infill on my print and it took my Creality CR10-S about 7 hours to print the winder. No adjustments need to be made and you can print it as it. However, if you wish to experiment and are good with 3D software like Tinkercad, feel free to modify it to your needs.
**TUNE ANTENNA TO THE MIDDLE OF THE GENERAL PORTION OF 40M BAND 7.237
You should be good for 40, 20, 15 & 10 Meters.
Enjoy your EFHW Antenna!