End-Fed antenna revisited… again!

podcastWell, I really hope all of you had a great summer so far? We had a great one here in Quebec this year. We had plenty of beautiful days with a lot of warm period to go out and play with our ham radio gears…. even also to renew with astronomy that I left behind since 2007! What a great summer!

I was searching for quite some time for references related to end-fed antenna. Not especially for much technical details, but more about experiences from users in the field. I happily found a short, but a great article from W1SFR Stephen wrote back in 2013.

20160216_191324206_iOSAn article I previously wrote about “end-fed antenna using an Un:Un 9:1”. End-Fed link

T68-2 (3 wires)
T68-2 (3 wires)

The main reason I was searching for such document it is because I am using this kind of antenna for portable use, and I really like the simplicity of this antenna for many aspects: fast to deploy, works on many bands, no antenna to tune, honestly effective for casual use, etc… Much of my argument is related to personal consideration of course…. like many other aspects in our lives.

Now back to the document from W1SFR. The document from Stephen was for me a way to bring field experiment results over technical details. And atop of that, he is using an Elecraft KX3, like I use an Elecraft KX2 myself since last May 2016. So I was also very pleased to find in his document a reference chart of wire lengths to use, and which “traps” to avoid when using such antenna.

The end-fed antenna he is using in his article is combined by the use of the same 9:1 Un-Un that I am using. So great! We are now comparing almost an apple with an apple!🙂

I built my 9:1 Un-Un using the EARCHI documentation that can be found here… EARCHI document. We even use the same length of coax, but not the same type… I’m using the lossy RG-174… I prefer to keep everything smaller and lighter as possible. If I take a look at his comparison tests he presented in his chart using different antenna analyzers, I am also getting similar results on my side with mine.

My results using a RigExpert AA-600 using 25 feet of coax, 35 feet of wire atop of a 31 feet fiberglass mast.

I was reading recently many comments from people that were bored of the actual DX condition when doing outside operation; DX condition are not are their best, hard to operate QRP, etc….  But what the hell…. Hi!! Most of them also discovered that when using digital modes, even when we could find that the DX condition are not at their top, that many, many DX contacts could be easily done when QRP. Let me tell you that I had plenty of fun so far during my last summer! I even found that when using an end-fed antenna, running QRP and using digital modes…. I was able to reduce my power by half… so from a big 10W SSB🙂, I used 5W or less when using PSK, RTTY or even JT…. and 1W or 2W was also very often possible. It is fun to try to use less power.. it is part of the hobby… the experimentation!

Well, back to the End-Fed antenna. It is fast to deploy and to have fun. Fairly efficient, especially when using CW or digital modes, compact, lightweight, etc… I prefer this antenna over many others that I actually own, and that I do not use very often for many reasons.

So, the article from W1SFR gave me another confirmation, another point of view, that the End-Fed antenna could be a well performer.

Give this antenna a try! It is a low cost antenna, that could be easily built, and could let you potentially renew with the fun of outdoor operation, in a minimalist way!!

I would like to thank W1SFR Stephen for his great article. Another link from W1SFR…. his antenna kit… www.kx3helper.com.

Meanwhile, do not forget to subscribe to my blog and my YouTube channel as well.

Have fun and stay tuned!


Jeff | VA2SS

ADSP Audio Filter FDS-02 from BG5ROJ

Hi guys,

I just received yesterday from my friendly group of ELEKITSORPARTS, a small and smart group of amateur radio components designer and builder, the ADSP Filter FDS-02. They sent to me, for testing and review purpose, this small and effective audio filter that do more than just filtering!


Meanwhile, you can visit their website at http://www.elekitsorparts.com

Do not forget to subscribe to my blog and my YouTube channel as well.

Have a great summer and stay tuned!


Jeff | VA2SS