Thanks for your interest in my HWEF article. Don’t worry, the original article is still online. I will write an updated version but until then, even though the article originates from october 2012 and is kind of outdated, I think it’s still a good starting point.
I started experimenting with HWEF antennas way back in 2012 inspired by information on Dutch ham radio forum http://www.zendamateur.com. I got so many questions from over the world that I decided to translate and compile the most relevant info from the forum. The antenna described in the article is actually based on a PAR EndFedz that was commercially available back in those days.
I’ve made short vertical “holiday” versions, I QRO HWEF for 80/40 and many others. I’ve come to many new insights. I’m still using them though (and designing new ones, just for the fun of it), but I think I have better understanding about the pro’s and cons of a certain configuration. Even though some people don’t agree, the HWEF is a compromise antenna, a good one though if you’re sensible enough to tailor it to your needs. My newer articles about the HWEF probably helps with that.
I’ve decided to use this page to gather interesting links to HWEF antennas including my own articles. The original article is still here to stay, but I recommend you read the other articles as well.
Backpacker’s QRP HWEF systems (April 2020)
20m L/C trap for 20/15 HWEF (March 2020)
Optimised 20-10m HWEF with FT240-52 based transformer (March 2020)
Considerations what toroid(s) to use for the HWEF transformer (February 2020)
Discussion on HWEF bandwidth or “broadbandity”?!.. (January 2020)
Update on my dual band 80/40 HWEF (December 2019)
QRO HWEF for 20m/15m (2014)
40/20/10 vertical holiday HWEF V2 (2013)
40/20/10 vertical holiday HWEF V1 (2012)
Original article: “Multiband half wave end-fed HWEF” (2012)
Articles from other authors:
RF transformer design with ferrite cores – initial steps (Owen Duffy 2019)
WW1WW’s matching transformer for an EFHW (Owen Duffy 2018)
End fed matching – VK3IL design on LO1238 (Owen Duffy 2017)
End fed matching – PA3HHO design review #2 (Owen Duffy 2016)
End fed matching – PA3HHO design review (Owen Duffy 2015)
End fed wires – new hams love ’em (2014)