I already built one of these earlier this year.  It was originally going to be a temporary antenna until I purchased something more substantial.  I was thinking a small Yagi or some sort of vertical.  However, it performs so well and meets my needs so I decided to install it permanently in my back yard.The components to build the un-un for the ARRL EFHW kit. I have an HOA so this wire antenna works well. It’s difficult to see from the cul-de-sac in front of me house.  It is attached to the eaves on the second floor of my house and slopes down to a mast attached to the block wall in the opposite corner of the backyard.  The mast also holds my Comet GP-3 VHF/UHF vertical antenna but from the street down the hill to the north it just looks like my neighbor’s flagpole!


Unlike the dipole antenna, which is comprised of two quarter-wavelength wires and fed at its center, the EFHW is a half-wavelength antenna with the coaxial cable for your transceiver attached at one end. It has become popular with portable operators because it’s very simple in its construction and deployment.

I’ll be teaching the Radio Merit Badge for my scout troop in October so I decided to build another one of these antennas for portable use.  Hopefully, with the help of my drone, it will be easy to deploy.

My Yaesu FTDX10 puts out 100 watts which is perfect for this antenna since it’s rated for 250 watts.

Also, I have about 15 feet of Davis RF Bury Flex cable left over from when I installed my antennas in the backyard.  I purchased some PL-259’s and an extra 40 feet length of RG-8X with connectors already installed as a back-up.  I hope to do a trial run with my battery and solar charger in the next week or two.