HF Kits 250 Watt End Fed

[@kmel4449]

Finally! An instruction video that is an instruction video! Absolutely no unnecessary talking. Straight forward, step by step. Great job. Thank you. Others on KZbin should take note, no matter what the topic. This is the way it should be done.

[@GrayPlayer]

And no music!

[@Stingmni]

This is the best i have seen! Your comment is on point.

[@mikes6844]

Purchased a kit, delivery and quality of kit excellent. Enjoyed making something again and will be used for EFHW for SOTA and POTA.

[@joeb3300]

I built roughly the same antenna (resold by ARRL for Field Day 2021). The ARRL version was lower power, I believe, and covered 40/20/15/10M. Using a nanoVNA I was able to trim the length (removing about 2.5' in increments) to get the SWR minimum to fall at the start of the 40 & 20M bands (but closer to the middle of the 10M band), perfect for digital work. I have been very happy with the performance. A week ago I replaced the ~62' wire with a 130' wire, and am now able to work 80M too, w/o a tuner. If I ever build one from scratch, I'll use two or three toroidal cores stacked to handle more power. Even 80 Watts, operating digital (WinLink), is too much for the single toroid core supplied with my kit.

[@Stingmni]

This is the best video i have seen on making Ununs. no frills or froth.

[@robertzagrabelny5267]

Impressive kit - all parts included and enough material to complete the job - excellent instructional video

[@donalfinn4205]

Thanks for that Frank. I only made mine up yesterday but I’m going to redo it now after watching this. I got a good laugh from this as well.😂👍☘️

[@geraldcodrington6620]

Marvelous,this is what Amateur Radio is all about,...Do it your self.Thank you Sir.

[@Stuff_happens]

Just bought this kit. Thanks for the video.

[@toddxhadandl8083]

I made the Quad loop 2:1 choke/balun kit. Came out great and works great for a delta loop. Top quality and fast reasonable shipping to Alaska. Perfectly flat SWR 40 meter delta loop. I also built one of these 49:1 1/2 wave on 75 for NVIS operation. Works great.

[@aerozg]

Looking to buy this kit as we speak, the building instructions are not in english, but in dutch, so this video is very helpful! Thank you!

[@twohandsandaradio]

Interesting the corners cut by companies charging a premimum. No ground lug? 250 watts I would think they would want 2 cores instead of 1. Curious as to what AWG magnet wire it is? You did a fine job on the build. From experience I would say put the SO-239 on the outside as you lose some thread length going on the inside but looks like a good build.

[@mitstax]

14 gauge is the magnetic wire size

[@MauriatOttolink]

Put your S0239 inside. You lose threads to the wall thickness of the box. How long is the twisted section?

[@mikeheneghan7351]

Great Video with nice closeups. plan to buy this antenna after Christmas. Thanks for the well done video. Mike K1MIC

[@DL8ZAJ]

Take care: if you are building the 100 W version the holes for the connectors must be drilled in the box turned 90°. Found out after i followed this video with the 250 Watts version.

[@richardfryer8646]

..looks like 43 material (no red paint) .. winding the core, put the end of the twisted part into the chuck of that drill.. makes a neater tighter job.

[@Bass-guitarist]

These 1:49 Ununs and in fact nearly everything I have tried to make using a toroid has NEVER worked out on the right freq and impedance when analysing after construction. Slight change of winding spacing, slight change of position has all made a wild difference. These things are like black magic to me. One day...... lol Also i have had different results of freq depending on the toroid and mix used which hasn’t always been the ones stated.

[@willian.direction6740]

Thanks Brilliant video on that job.

[@remikskrzypek4694]

perfect made end fed congratultion

[@harrisleck3960]

This was built incorrectly making it very tight with the post next to the SO-239. If you look at the "instructions" the box should have been drilled on the sides (from the way it is shown in the video). That gives you more room to work. As has been pointed out by WA7ARK in his eHam review, the antenna does not resonate on any band except 40 meters (if you trim the wire). See WA7ARK's article to get this antenna to work as advertised.

[@twohandsandaradio]

The build is fine. He made it his own. Slow down Sparky or make some content of your own and show us the "right" way.

[@PC1I]

@@twohandsandaradio Not only there is nothing wrong with the kit, WA7ARK is using his EFHW in a flat dipole configuration and not in the sloping configuration that is used by everyone that uses EFHW antenna's. Claiming the manufacturer does not know his product... The kit is fine, the results you can have with these antenna's are OK. And, the theory given on the webpage for this kit is providing pros and cons for this antenna type so builders can know what to expect...

[@pancerneparadoksy1410]

Master, you are great ...

[@ea6wu]

Thanks for the video!

[@BastHoen]

Goede en mooie instructievideo! Tnx, 73 PA5BAS

[@jimcrawford3206]

N6JBC This video is fine, except that there is no commentary to go along. It would be much better if Frank was explaining what he is doing along with the video. Also show the steps in such a way that a novice can follow along.

[@gangadharana2467]

Very usefull Video

[@aaronlabranche2977]

Where is this sold

[@jay-rus4437]

I had to open my Chameleon Emcomm III because one of their nuts wasnt tight and the wingnut was spinning the bolt. They fill the inside of theirs with what seemed to be dielectric grease. At least that is what I assumed it was and I “topped” it off before closing it back up. Just thought that was a pretty good idea though. Would ensure no moisture could cause any issues in the long term

[@jeanyves5380]

I,Thank's for your video. What is the purpose of that? May you have a link shematic or any explanation? Thank's.

[@okhamradio]

What the length of the copper wire

[@OE1TOA]

Thank you for the Video ! 73

[@deanberglund2332]

No weep holes and no counterpoise connection? Otherwise, it looks good. How is the performance for you?

[@HFKits]

For field work an external counterpoise isn't necessary. The coax shield will be used as counter poise. For permanent solutions at home a counter poise and common mode choke will be recommended.

[@jimself1954]

If you want an all band, no tuner needed antenna...this is it. Is that enough for you to try it? When I say no tuner, I have had to use my radio tuner on the high 200 kc of 80 meters. 3.800-3.999 so...

[@jimself1954]

@John Cliff I wind up 6 feet off the end on a1 inch piece of pvc to move the swr on the top end of 80 meters.

[@franciscobarragan6284]

And the test with the radio or the antena?

[@ciaociao204]

50 MHz??

[@mammumk4917]

Super

[@jaywardjulian6163]

Do they sell them like that? And may i ask for the link where to order

[@Andersonllopestv]

Top, muito bom .

[@brianrose2487]

Thank you for the great video! Where do you buy this kit? 73

[@HFKits]

Thanks! www.hfkits.com

[@danamarcy5414]

Sorry to add, your drill bit has a broken off tip.

[@joewilson2258]

I seen two mistakes in this video and the first one is the wire twists are not wound up tightly and the other is the length of wasted wire . Other than that I like the idea of building your own end fed transformer for a Long wire antenna .

[@ralphmills7322]

I was also surprised than he didn't use the electric drill to get a good tight twist.

[@geokuf9679]

Joe Wilson, this transformer is not for longwire antenna, BTW longwire as antenna is one word.

[@x_CrossHair_x]

I know this all about HAM Radio I just SWL I'm not a mathmatician to calculate my own Balun.. Currently i'm using a 49:1 big diff..(Best up to now) as went from none to 9:1 then 49:1.. I seen hints that a 150:1 is possible.. but can't find instructions to wrap one..just want to try to see what happens Would be sweet to RX 30KHz to 30MHz.. (Set-up now) only starts 500KHz to 25MHz give or take. not very strong signals above 25MHz could say "ZERO". Guess i'm wishing for too much.

[@n4lq]

Join the FB group for more detail. facebook.com/groups/EndFedHalfWaveAntennas/

[@africantwin173]

@Frank Bontenbal Will there be a QRO 1 KW available.

[@africantwin173]

@John Cliff Maybe a little late Sir, but I ordered some USSR capacitors 10KV and cores from Ceszka Republic. In the EU they all work qrp with QRO prices.

[@jeanbernarddelbare]

Bonjour a quel endroit souder la résistance pour le test merci bonne continuation

[@HFKits]

Bonjour, Vous pouvez placer une résistance entre la connexion de l'antenne et la connexion de terre du connecteur coaxial. N'oubliez pas qu'il doit s'agir d'une résistance sans induction. Le TOS sera plus élevé avec ce test qu'en pratique.

[@jeanbernarddelbare]

Bonjour de la France Frank toujours aussi réactif et j'apprécie ! Novice oblige une résistance 1/4w à film métallique peut elle convenir ? Merci prenez soin de vous et de votre entourage ,bonne continuation. Jean bernard .

[@vfrfoxtrott6430]

👍

[@Stuff_happens]

Is that end fed still working out for you?

[@HFKits]

Still working great!

[@Eweyouhew]

250W continuous means less than 100W CW Continuous. FT8 is no different than CW Duty Cycle. Not Dit Dit Da Da but Daaaaaaaaaaaaaaaaaaa ……..

[@jeanbernarddelbare]

Bonjour Franck peut on entourer le tore ,de ruban téflon ? merci pour un kit acheté chez vous

[@HFKits]

Le blindage du fil d'enroulement en cuivre est suffisamment épais pour faire le travail sans ruban de téflon. Si vous souhaitez utiliser du ruban téflon pour être sûr, ce n'est bien sûr pas un problème.

[@jeanbernarddelbare]

Bonjour de la France Franck merci pour votre réactivité et réponse j'ai omis de préciser qu'il s’agissait d'un fil émaillé .

[@HFKits]

@@jeanbernarddelbare Bonjour, Je parle en effet de fil émaillé. Peut-être que la traduction néerlando-française n'est pas si bonne ;)

[@jeanbernarddelbare]

si si frank je suis même surpris de votre bon français (; je pensais que vous aviez mal compris . Bonne fin de soirée.

[@K6TJO]

i'd like to see it working

[@HFKits]

I use this specific antenna for about a year now, without any issue...

[@jimself1954]

It works just like they say it does. All bands...no tuner. kw4pw

@@HFKits What wire lenght have you used? Cheers

[@HFKits]

@ You can use different wire length, with or without coil. Here you can find different set-ups: www.hfkits.com/build-instruction-impedance-transformer-for-end-fed-antennas/

[@SAKSALAINENVILLIMIES]

@@HFKits www.hfkits.com/build-instruction-impedance-transformer-for-end-fed-antennas/ Good job, Frank, at least another transformer with the correct number of turns! There are so many 1:49 transformers in the net which are not wound correctly. When you look at the above link to HFkits: Even there is a drawing with the wrong number of turns, whereas the pictures show the right number. (Or is it simply irrelevant, if there is one turn less on the primary side? )

[@barrykery1175]

Looks good to me. KU3X

[@josehenriqueschossland485]

Thank You 73"PU5IKE - HENIRIQUE

[@whamni]

You can buy them ready made for the same price !

[@pa3fat]

probably not.

[@M70ACARRY]

Link or not true

[@pa3hgt]

@@M70ACARRY not treu ;-)

[@erikb1252]

And having the joy of making it yourself would be taken away, worst part!