Fault Finding: Sigma Euro-Comm LW20 End Fed Long Wire Antenna and 9:1 Unun SWR - Ham Amateur Radio 

Ben, my advice is keep the 20m long wire and buy a 49:1 transformer. Connect it up and you have 4 bands: 40 20 15 10 no tuner needed. It will knock the 9:1 out of the park. 73

I purchased this from Myantenna EFHW-7510-2K-Plus - EFHW-7510-2K+PLUS with Pole Installation Plate X 1 and its been great its also an end fed.

Nice videos, next time put a 450 ohm resistor on the antenna connectors. That's what a 9 to 1 is looking for. That said the 9to1 are very inefficient, try a 49:1 or and L Match.. they will open your eyes. 73

Personally, I would have checked the unun first. But that's just me, since I've had problems with ununs.

You removed a tree on your friend's advice? What if your friend said that your house may be the problem?

OMG, a 20m wire IS TUNED! It is resonant as l/2 in 40m and l/4 on 80m.

After you fixed it did the icom 7300 internal aut work with it

From my understanding of antennas I would have thought a 49-1 would have been a better choice due to high impedance on End-Fed wire, and a 9-1 would be better suited to a Random wire. But well done on the detective work. Shaun M3ULT

Köszönöm, nagyon örülök, hogy ezt a videót megcsináltad! Thanks, I'm so glad you made this video!

What has happened to Ben nothing in a year. Hope all is well.

Great video are u getting commission lol 😆

well done for putting this on here,

Great job Sherlock! 73.

Another really interesting video Ben. I've got the same long wire antenna on its way (currently being held captive by UPS) for my first HF rig along with a Xiegu X90. I hope I don't have the same problems you do. Great detective work there though! 73.

Keep up the good work Ben. As we are now in tier 4, you will need to look after the analyser and unun for a little while longer. If I need it before then, I know where you live...

WOW.... poor tree just for touching your antenna. Let's hope a family member or your wife doesn't touch it in the future. They will end up like the tree. 🏴‍☠️🏴🏴Great video. Motters M7TRS 73's

Hope you don’t mind me asking but are you a Pastor or a reader of theological books??

Excellent troubleshooting and that’s why we love this hobby. 73 WD4DDA

hm I have the same one just hung it up in my backyard. 13m down from the roof and then turn into and L so not a straight line. Mine also has the last part of the L so to speak in some branches. Now mine works fine on all bands even 80m but only on 40m is the SWR skyhigh... not a clue why as of yet ? ;-)

Hello! Congrats for being so stubborn! It definitely payed off! I'm thinking to buy this antenna to use it for portable QRP with a Xiegu 5105 (or the new x6100). These radios have an internal tuner. Do you think will it be enough to tune the antenna on 40-20-30-17-12-20 meters?

Glad you figured out the problem. Hope that tree will grow back up.

Very good detective work and amateur radio sportsmanship. Keep up the good work!

That’s GREAT detective work, Ben. And also great that you defined the ATU as an Antenna MATCHING Unit - the term Antenna TUNING Unit (ATU) is the biggest con in the Ham radio hobby that Hams still fall for! A truer description might even be Impedance MATCHING Unit (IMU)! Great that you also impressed that an internal ATU should only handle a maximum of 3:1 SWR, i.e. when using an antenna that is close to resonance anyway. I know many a Ham who has regularly exceeded that limit and “burned out” their internal ATU. Most Hams should use an external ATU unless they absolutely know their antenna is less than 3:1 on the band they are using. Just Sod's Law ref the duff unun, eh?! A really great and clearly expressed video, Ben.

Dem low cost parts is the work of the devile