I've been in Amateur Radio since 1974, and still find new and interesting things to do. I like to build, restore, and operate on the air. This blog has been running for many years, so be sure to check out "Jump to Posts on Specific Topics" in the RH column to drill down and find lots of stuff. Visit www.WB4IUY.net for the lowdown at WB4IUY. Email me at firstname.lastname@example.org if you have any questions.
I completed my HF yagi today, for installation on the rebuilt tower.
For those who don't know, my tower of 23 years was torn down in a storm
in April 2016, destroying all of the 17 antennas that had served me well
for all those years. Everything from the vertical that had it's tip at
138' up, right on down to the lowest antennas that were only 30' up. In
addition to storm damage to the house and workshop, the tower and
antennas system created such a mess that I had to rent a crane
/ man lift to get it all down from the surrounding trees and untangle /
remove the mess of tower that loomed over our home. You can see the
system as it was before the storm on my website at www.wb4iuy.net , mouse over the [WB4IUY] in the toolbar at the top, and click on [Antennas] in the dropdown that appears.
Today I completed the feed harness for the driven elements, built and
installed a new RF current choke on the boom, and tuned this 6 element
Force-12 HF yagi. I got this antenna used for a great price...it's a
$1200+ antenna that I otherwise would have never bought, it just needed a
little TLC to bring it back to life. It is a trapless design, perfect
for operating with high power.
If all holds well, it'll be going
up on the tower next weekend, and I'll start the rebuild of the next
antenna for installation. I can't wait to get this baby in operation!
RF Choke wound from RG-214 and attached to the boom.
Bottom view, coax attached and jumpers installed between driven elements...
Side view, feedline attached and jumpers in place between driven elements...
Shack side of RF choke feed strapped to the boom...
Antenna tuned on 10m, had to shorten the elements, drill, and re-rivet to set length...
Antenna tuned on 20m, lengthened the linear loads a little to move the sweet spot down the band a little...
Antenna tuned on 15m, had to lengthen the elements, drill, and re-rivet to set length...
Antenna analyzer connected for testing...
15m elements lengthened a little...
10m elements shortened a little to move the sweet spot up the band a bit...