How to make a 2.7oz End Fed Half Wave (EFHW) Antenna for Ham Radio in 30 minutes or less!

[@whalerlife53]

Great job right up to the point you put the video in fast forward. The best part for a newbie is the part you can’t watch because you sped it up.

[@KK6USYHamRadioAdventures]

Sorry Whalerlife53 I just saw this comment . I have a video on just winding a toroid tips and tricks let me link it for you. kzbin.info/www/bejne/gInKoIyNipeXq6c

[@skeeterk7trd158]

That's one of the simplest designs I've seen, very nice!!

[@jaimen5nyb332]

Genius! Thanks for sharing.

[@AI6XG]

Nice idea to put the transformer on the bnc binding post, well done! Thanks for the shout out, glad I was able to inspire some different ideas! 73 de AI6XG

[@KK6USYHamRadioAdventures]

Thanks Dan, I just looked at yours and it popped into my head I think I had the binding post setting on the desk when i was reading your post. Thanks for watching and the comment, oh I contacted Adam on his SOTA Sunday with it and the KX2.

[@averageguysradio]

Thanks Chuck nice video, I think lots of folks will build this version. I had done something simular but with a different connector and it works amazing, it got me my first SOTA DX into Guadalajara Mexico from SoCal. 73

[@donausmus4281]

I have built your Apollo, Mercury and Ares. They are all remarkable antennas. I used your link for most of the parts and will build this as well. Looks like the same 49:1 winding as the Apollo.

[@bryceettwell9537]

I have to like this. Why? It is the same idea came up with After seeing Adam K6ARK's EFHW build on a BNC Plug. Unforunately, I could not find a suitable BNC Plug here in OZ, so I thought I would use a Binding Post adaptor. Chuck has just beaten me to it. Well done Chuck. Cheers Bryce, VK3NBI.

[@TheNoCodeTech]

Dude...... That cinematography tho. Cool antenna, gotta make me one of those. Team replay for the win.

[@n2jmb]

Cool video, thanks for sharing with us.

[@KK6USYHamRadioAdventures]

Thank you for the comment and watching!

[@JosephVE3GKT]

Absolutely fantastic video Chuck! Thanks for sharing! I've been using a 49:1 transformer from ebay with a 66.5' wire on my POTA activations recently. Although I haven't scanned the 75m, 60m, or 17m SWR/impedance, my IC-7100/Z-11ProII combination has tuned it up everywhere I've tried on these bands. The trick for 75 and 60 seems to be keeping the wire higher off the ground close to the feedpoint. The wire is less than a half wave long, so the high current portion of the wire needs to be elevated more than would otherwise be necessary for 40m. Thanks again, and 73 de VE3GKT!

[@KK6USYHamRadioAdventures]

Joseph thanks for the great comment and the info on feed point height!

[@Gravel_Rat78]

I’m running the exact same setup... how high do you have your feed point for 75m? I have mine at apx 25’

[@KK6USYHamRadioAdventures]

@@Gravel_Rat78 The day I did the scans it was in my lap sitting in a camping chair , so about 25-30". Thanks for the comment and watching!

[@thork0tjt515]

Great build! Thanks for sharing.

[@KK6USYHamRadioAdventures]

Thanks for watching !

[@JimmyShot]

Awesome video! This is the content we need more of, detailed maker videos like this are what the hobby is all about. The quality of your videos has gotten so much better lately man. Keep it up! 👊🏻

[@washingtonstatepicker3460]

Nice job! I was going to use a 140 but I may have to buy that tiny one

[@daniell8387]

I made one of these last night and got a couple good contacts, one the next town over and one in North Carolina I think he said. Definitely a capable little antenna.

[@modifiedtraditionalgardeni9938]

Thanks for the video really informative well laid out just what I needed. In the beginning was going to order another kit but supplier was out of stock. Stumbled upon your channel and this video and decided this will fit my needs perfectly and will be a easier build and a lot less instructions I did spend more more money than the other kit but it was only for one antenna. I bought enough supplies to build multiple antenna’s. Thanks again like your channel.

[@andyw6ad131]

Excellent build! Just what the Dr. ordered for POTA.

[@KK6USYHamRadioAdventures]

Thanks Andy , I think it will work great!

[@hamradiotube]

Man what a cool antenna build. I might have to give that a go one of these days. Nice job!

[@KK6USYHamRadioAdventures]

I kind of thought you might like a antenna build Mike lol !

[@jeffdyer2393]

That turned out nice. I do something similar with an empty bic lighter and about 20 ft of rg174. Works great. Thanks for the video keep up the good work.

[@jtlerch]

Perfect timing. I am in process of building a similar setup myself. Just got my upgrade to general and the idea of POTA is a driving force for me. Antenna theory and building has always been my favorite part of radio and now my world has opened up greatly! 73 KD0JAN

[@Lou-KI5FTY]

Great video. Do you have a link to thesmokinapes wire winder file? I would like to print it.

[@KK6USYHamRadioAdventures]

Thanks Lou , maybe that's what Liberty Cave was asking about I will get it and post above!

[@KK6USYHamRadioAdventures]

I posted it above , he said he thinks he printed at 60%. www.thingiverse.com/thing:3174253

[@Lou-KI5FTY]

@@KK6USYHamRadioAdventures Thanks! Again great video.

[@McPilot_W3DDS]

This is genius great job!

[@stationvictormike3415]

I built one on altoids, and yes, 1:5 SWR on 80m on anylizer.

[@DK5ONV]

Now that's a real smart solution. You made me want to have it that way too. Thx for sharing this with us. 73's de Uncle Günter

[@KK6USYHamRadioAdventures]

Uncle Günter, Im glad you like it let me know when you get it built!!

[@mohawk14616]

VERY good video and I thank you for doing it. psssst maybe a little faster talking. Great job though! The video and audio was awesome!!!

[@kacymcginnis]

Great job I use almost the same EFHW antenna setup for SOTA/POTA and it works well. I’m really curious about the 80m portion... I wonder if it’s acting like a 1/4 wave for 80 m? But then the impedance would be jacked up and there is no ground system except for the coax... I suppose if the coax it was about 64 feet long then you would almost have a dipole for 80m. Well who knows, it’s something fun to play with and that’s the fun of amateur radio! Another great way to make an EFHW is to mount the transformer directly on the wire winder like KM4ACK.

[@G7VFY]

You might be better off using TWO ferrites as you'll get better performance. You can also use an inch or two of coax as a high voltage capacitor. G7VFY

[@MM0OPXFieldRadio]

Brilliant build Chuck. I have my sights on on building 2 x EFHF for 20m only so need to to see how that will with only 10m of wire.

[@KK6USYHamRadioAdventures]

Thanks Colin, I need to catch up on your videos I'm falling behind. I pumped out 3 videos last week and haven't had much time to watch. Thanks for watching!

[@MM0OPXFieldRadio]

@@KK6USYHamRadioAdventures not all Chuck, I'm way behind myself, such much good content out there.

[@PendejoRyan]

Subscribed my guy. Nice vid!

[@KK6USYHamRadioAdventures]

Thanks for watching and the sub!!

[@the_mad_swimbaiter455]

Howdy everyone. I decided to make this and have 3 male and 3 female kits left over. KI5SXE

[@alexalonso2093]

good info CHUCK ty 7 3

[@jasonsnyder9394]

Cool video, thanks for sharing the build. Jason - WV3V

[@jasonsnyder9394]

I took and built one today, but have yet to est it out. Maybe tomorrow or Sunday on the VNA.

[@Siskiyous6]

Good information, may I suggest that if you say, "... link down below,..." that you then put a link down below.

[@KK6USYHamRadioAdventures]

Thanks for the comment. Which link are you looking for I think I got them all, let me know and I can add it?

[@KK6USYHamRadioAdventures]

The only thing I didn't link was the winders if that's what your talking about this is it , printed at 60%. www.thingiverse.com/thing:3174253

[@eddy4011]

Nice video and good information ,I want to know the size of the wire and the length please?

[@multilecful]

It looks on the video like you connected the cap on the output side of the transformer. Normally it goes on the input side in every on I've ever done. What dark magic is this?

[@KK6USYHamRadioAdventures]

Nigel at 2:48 in the video look at the diagram, the capacitor goes to the TX and GRD sides, I attached them to the binding post which would be how you have done before. It's just a tight setup and hard to get on camera sometimes.

[@bodstrup]

Is it OK to use silicone insulated wire - like 22 gauge also used for antenna wire ?

[@KK6USYHamRadioAdventures]

For which part?

[@hernanbenavides4821]

Great video thanks! what max power can you put into that antenna? 73's

[@KK6USYHamRadioAdventures]

I have run 12 watts SSB with no problems, probably 15 max ssb and 5 for CW and check to see if it gets warm. If more needed a bigger toroid or stack 2. I just built and tested another EFHW using a 140 toroid handles 100 watts easily on SSB video will be out in a couple weeks. Thanks for the comment and watching! 72

[@slick8086]

how much does the wire gauge impact the effectiveness of the 49:1 balun? Do you need to do more/less turns than if you use say an 18g?

[@BretChilcott]

Excellent video and tutorial. I built the antenna and tested it. On 7.041 Mhz the SWR is 1.4 and the resistance is 35. What do you think I I should adjust to improve it?

[@KK6USYHamRadioAdventures]

Hi Bret, I like to keep the coax end of the antenna about 1 foot off the ground that seems to help some but I think it depends on how high it is when you tune it. If that is to low in the band try folding the wire ove to make it shorter it might be too long.

[@mikemiles3068]

Good video❗️KV5P

[@billelovski2783]

Up to how much power will this antenna handle? 30 watts?..

[@madalinbetea9871]

Hello can use FT82-43 on EFHW antenna with 10W SSB ???.

[@wild-radio7373]

🤜🏻👍🤛🏻♡♡♡

[@wild-radio7373]

Sorry I missed the livestream earlier!! #TeamReplay for the win♡♡♡

[@JimmyShot]

Best place for the capacitors?

[@KK6USYHamRadioAdventures]

I show where I put the capacitor, in the 2 ring connectors and soldered. Hope that helps.

[@JimmyShot]

@@KK6USYHamRadioAdventures no sorry I meant to buy, found some though. Came in a big pack with different values and was looking for just those ones. I got plenty of others to play with now lol