When radio amateurs get ready to put an HF station on the air, they often have questions about what antenna to use. The good news is that there are many options to choose from. The bad news is that there are too many options to choose from. It can be overwhelming. This post describes an antenna I just installed that is easy to put up and works well.

Having 30-foot tall pine trees on our property, my usual approach for HF antennas is “wires in the trees.” I have several ropes strung up over these tall trees so that I can raise and lower wire antennas as needed. These ropes were installed using a slingshot to launch a fishing line over the top of the tree, and then pull up a lightweight rope.

End Fed Long Wire

The antenna is the EFLW-1K from MyAntennas.com, which is an End Fed Long Wire Antenna. (This should not be confused with an End Fed Half Wave antenna.) This antenna is intentionally cut to not be a resonant length on any of the bands. The 9:1 UNUN transforms the high impedance at the end of the wire down to something closer to 50 ohms. The match is not perfect so an antenna tuner is required to cover all of the bands. MyAntennas offers this antenna with different lengths of wire, with longer wires required to support the lower HF bands. I purchased the 53-foot version but decided to shorten the wire. My interest is working 20 meters and higher and I wanted the antenna to be mostly vertical, so I shortened the wire to about 30 feet. The MyAntennas products are good but any 9:1 UNUN on the end of a wire will work.

An endfed antenna like this needs some kind of counterpoise to balance out the antenna operation. Many people have written about this and there are many different approaches. The MyAntenna UNUN has a connector intended to support adding a short length of counterpoise wire. A decent length of coaxial cable lying on the ground can function as this counterpoise and that’s what I decided to use. I have a 50-foot length of LMR 400 connected to this antenna, lying on the ground.

I also added an inline isolation transformer to minimize the common mode currents getting back to the transceiver. I don’t know that this is required but I had one available so I used it. The antenna has 50 feet of LMR coax to the inline transformer and then another 25 feet of RG-8X to the transceiver. The internal antenna tuner in my Icom IC-7610 handles this antenna quite well, tuning up on 20m, 17m, 15m, 12m and 10m. This means I can instantly switch between the bands and be ready to go.

I’ve been running SSB, FT8 and FT4 on this antenna, working many stations in all regions: Europe, Asia, Oceania, Africa, North and South America. Conditions are great and I keep telling newer folks: now is the time to be on HF! This basic antenna is a great way to get on the air and work some DX.

73 Bob K0NR

The post An Easy HF Antenna appeared first on The KØNR Radio Site.

In this episode, we join Martin Butler M1MRB, Chris Howard (M0TCH), Martin Rothwell (M0SGL), Frank Howell (K4FMH), Bill Barnes (WC3B) Ed Durrant DD5LP and Leslie Butterfields (G0CIB) to discuss the latest Amateur / Ham Radio news. Colin Butler (M6BOY) rounds up the news in brief and the episode's feature is New Year Ham Radio Hints and Tips.

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Hello and welcome to the 528th installment of Linux in the Ham Shack, the first for the year 2024. In this episode, the hosts take a deep dive into the JTDX application for weak signal modes. Topics include features, download and installation (package and build), configuration, operation and much more. Thanks for tuning in and have a great week.

73 de The LHS Crew

During the 2023 Canada Winter contest I had an odd thing happen twice with the Reverse Beacon Network website. But before I go into that let's talk about what I use the Reverse Beacon Network for in contests. This site has a huge amount of stations that just listen for stations calling CQ. If you are heard then you are shown on a world map along with your signal strength to that location. This is a great tool during a contest for me as it shows where and how strong my signal is. I have used this site for years but in the last contest, something happened that never has and it happened twice.

I was calling for some time on 40m CQ contest and I was getting Reverse Beacon Network feedback from my signal. The reporting station MM0ZBH reported me but on 20m? Informing me my signal was 6dB and on 14036 and not 7.030 where I was calling CQ contest this was at 2337UTC.

 Earlier at 2212UTC the same station had reported me again on 20m this time at 14030 when I was calling CQ on 7030 and my signal strength this time was 28dB. This was odd and even more so when it happened twice in the contest. Any ideas out there and has anyone had the same issue happen to them?

MM0ZBH is the 6th station down on the list

Ham College episode 108 is now available for download.

Extra Class Exam Questions – Part 46
E9D Yagi antennas, parabolic reflectors, circular polarization, loading coils, top loading, feed point impedance of electrically short antennas, antenna Q, RF grounding.

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