My 80m EFHW with a coil at 2m, it is resonate 3.560, 15m high horizontal across my yard. I think your antenna is too short. When I first tested 40m was in 6.8 mhz and 13.6 mhz for 20m. I just cut it shorter until I was happy with 40/20m and ended up 1.5 t 1 on 15m and no good on 10m more in 27.9 etc. I made a 1 T 1 balun and put it at my transceiver end on my feed line maybe to choke common mode on the coax or not !! not sure if it helps or not. Its not necessary for me to tune it across the bands but I just nip it up with the tuner in my ic7400 anyhow. regards vk5cz ..
I want to move the choke on the transceiver side as well. The hight of the antenna is something I can't change for now. But I am planing on making it some sort of I verted V to have the middle a bit higher. Mine is the same.. as I do towards 10m the SWR is not as great... but I can still manage that with the tuner. I think with a bit more experimentation I can get it as I want it to be )) I still have to work a bit more on the compensation coil and the value of the 64.1 transformer. I will try to get the best I can and leave it as it is. But I know I tried haha. If not I will always ask myself if I could get it better haha. Thank you for sharing the info. It helps a lot. 73, YO6DXE.
Ciprian, I am sorry that you lost your larger antenna location. I am in the process of building an 80m-10m EFHW based upon the Fair-rite 2643251002 core popularized by Colin MM0OPX. I realized I have been trying to get too much done with the inductor. Waters and Stanton, Steve Ellington mention the capacitor in the middle, but Waters and Stanton suggest the most straight forward tuning. Use your the 80m wire and inductor to get higher bands where you want. Then add capacitance until you raise 80m to where you would like it. I am not sure what frequencies increase the most when increasing capacitance in the transformer. I think its 10m. Right now I am using 120pf in the transformer that has taps for 49:1, 56:1, and 64:1. The 64:1 definitely lowers SWR on 80m. I'm still playing with the inductor. The starting point was 9 turns on nominal 1/2" PVC. I am now at 8 turns. Its still crazy. I need to lower 7m & 20m and raise 15m & 10m. So, I guess I lengthen overall and take out inductance. The rub is I want 80m primarily for 3.94mHz. I think I will end up using close to 500pf in the middle. Keep having fun!
Bună! That's the real Ham Spirit: own designs, experiments, building own knowledge and experience. And sharing it with others. Hope to meet you on the air! 73!
I’ve gone back to experimenting with my EFHW 8010. I have always had a capacitor in line exactly half way along the wire. I never had a compensation coil on the antenna. So I figured out a way to insert a coil without needing to cut and solder the wire. I can add turns to the coil or take turns away easily without cutting or soldering. I can also move the coil position closer to the feed point or slide it farther away. I have made about 14 or 15 different changes and tested each one. My best results so far is having 5 turns on the coil with a 1.25 inch diameter and have the coil placed at 75 inches from the feed point at the output of the transformer. I started with 10 turns and having the coil 78 inches out. So far all of the bands are under 1.7:1 SWR and some are down to 1.05:1. The exception is 30 meters. It is a little over 2.5:1 and needs a little help from a tuner. I’m not done experimenting and will try a few more things. I do not use a RF choke in the feed line and I do not use a counterpoise. I have the ground of the transformer connected directly to a 8 foot ground rod pounded all the way into the ground. To make a sliding coil use a piece of PVC pipe 2 or 3 inches long and use a dremel tool to cut a “J” shaped slot into each end of the pipe. Then you can snap the wire into one J slot on one end and wrap several turns then snap the wire into the other J slot on the other end. The coil will stay in place and not pull out. Then you can loosen the wire on one end and move the loose bit of wire around and around the coil until the coil is tight once again and you have just moved the entire coil position on the antenna. You can also easily unsnap one end of the coil to remove or add turns.
I think the way you build the sliding coil is fantastic. So much easier to make adjustments and experiments. I was curious since I didn't got to test the capacitor in the middle version of the antenna... is it better with the capacitor, or with the compensation coil from what you experimented so far ?
@glevideo I am also very curious. I've seen commercial versions as well that had both the coil and also the capacitors. I kept telling myself I will test this too, but the free time doesn't want to help at all.
Dear OM, that is very good work and I also like your garden and view. One thought that you may want to look into: There is a large discussion about if you need a counterpoise for an EFHW. I think, it needs one. It is good practise to have a little counterpoise (lambda * 0.05) at the ground from the coax connector of your transformer. Alternativly you can use the shield of the coax between the transformer and the choke. That means you have to consider the lengthe between choke and transformer to be 0.05 lambda of the lowest planned frequency (4 m @ 80 m). EZNEC modelling supports the effect of the counterpoise. Continue the good work and 73 de DD1TA
Good morning and thank you so much. Ohh yes you are right. Initially I wanted to use the coax version but I noticed that placing the rf choke at that distance is was also changing the proprieties of the antenna... not sure why was that... but now I do use a counterpoise and the choke is on the transceiver side. Have a fantastic weekend and 73, YO6DXE.
Thank you so much Klaus. Is a really nice quiet village... we used to have a lot of German people living here in the past. Most houses ( the older ones ) were built my them. A lot of history behind 😀. Wishing you an amazing weekend as well. 73
Beautiful Garden and what a Dream Panorama if you just look out of your Window. Good Job on Endfed Antenna Setup. Happy Weekend & 73 de Uncle Günter 🙋♂
Thank you so much... ohhh the view is from the attic... but I do enjoy it often these days as I'm always up and down testing and experimenting with the antenna hahaha. The garden does looks nice from the spring all the way in the fall. I like this place. 73 and have a great weekend, YO6DXE.
I will suggest that you try adjusting the transformer coil a little by squeezing the coils closer together or spreading them apart. This makes a difference. I noticed you 80 meter had high SWR at the low end but the impedance was just about right and very close to 50 ohms. When you moved the VNA marker higher in frequency and the 80 meter SWR came down to about 1.5:1 the impedance went way low. Some adjustment in the transformer coil will change this. You might even need to remove one turn of the toroid coil.
Yes indeed. I only learned about this afterwards. It took a lot of headaches hahaha and experiencing with both the 49:1 and also the 64:1 transformers to see what works better. Also another problem I noticed was the placement of the RF choke. Since I moved it close to the transceiver the results are way better... and also the type of RF choke seems to matter a lot too. Now I no longer have this antenna as I moved into a new place and I don't have as much space. I am working on building the shortened version that has the coil at the end almost. But talking about the RF choke... while testing the new antenna I realized I had 1:1.3 with the coax RF choke type... and 1:1.04 with the one made with parallel insulated wires. Impedance was the same on both. Is nice in a way that I get to learn and experiment and realize how everything interacts together and influence the result at the end. With headaches or not... is the best hobby as I learned more now than ever. Love it. Thank you for the tips as well. 73, YO6DXE.
I want to build a shortened version for portable... but I won't use 110uH... but 55uH and extend the end to 3-4m depending on what's necessary. I will also try to use some thick wire for the coil... 1 or 1.5mm. These should help a bit with the bandwidth on 80m.
Hello!, Nice video, compliments. i did a lot of experiment on my inv L 8010 with vertical size abt 10m and the rest in horizontal. Two observations about counterpoise and compensation coil: 1 Conuterpoise is too short, generally minimum lenght is 5% of lower band, in this case 4m. I tested this solution and it was good but in my case the best solution is with 3 or more radials 4m long. RF choke is no more necessary because corrents flow thru the counterpoises (radials). 2) compensation coil: initially I built a compensation coil similar to yours, but after studies and experiments the better results was with 7 coils on 32 mm pipe.
Grazie Franco. I use no radials at all on mine. I don't have the space )). I also wanted to try putting a little bit of wire vertical... but the way the house is ... it doesn't allow me to do that. I will try to rebuild the compensation coil as you did yours because I think mine is not yet perfect. But I stopped at this one because I had no more time to experiment ))). I will try to see how I can use some radials at least ( counterpoise ). So far I didn't had problems with common more curent... but is better to be safe ). Thank you one more time. 73, YO6DXE.
Hello, Ciprian I use 2 common mode chokes for this antenna, first one .05 lamda down from feedpoint which is calculated for the lowest band of operation. Calculations are 0.05×80M band = 4M. I wind 8 turns of the feedline around a 240.43 toroid down from feedpoint and another one before entering the shack. This eliminates rf on feedline. Hope this helps and keep up the good work. 73 de Aiden EI8HJB.
Thank you so much. This helps a lot. I only have the FT140-43 to make the chokes now... but they should be ok for now. 240-43 are a bit expensive for me haha. I will need to get four of them to build a proper antenna ( 2 chokes and the transformer built on a double stack ). Ohhh and thank you for the calculations ... that helps a lot. I will come back with another video on the antenna sometime this summer for sure. 73, YO6DXE.
I was looking for a frequency of 3.8 MHZ and club net of 3.9 mhz. A 49:1 transformer with a 122.5' wire did the job. I was looking for that range, but it can be longer or shorter for desired range, with no tuner. If you align for 3.5 Mhz, all other bands fit. When tweaking, some bands become less resonant.
I did some experiments last week I beleive... I will be back with a video on the results. Playing a bit with everything.. the compensation coil, the impedance transformer etc. Strange and interesting results comparing to the theory of it ))). I want to try they way you made it as well and put all on paper... for future reference hehe. Thank you. 73, YO6DXE.
@@dxexplorer Yes, I believe when I was looking for 80 meters first, then all other bands came up good. That for SSB . 122' 6", was resonant in all other bands up to 6 meters. The SWR was so low, so if necessary, the internal tuner could do it.
I try to see if I can get the SWR no bigger than 1.5:1 on all bands from 80m to 10m. No luck so far, but that is the fun in experimenting. At least we can try haha. We will see how things work out.
@@dxexplorer 80 for me was, 3.780 1:1, 3.8 = 1:1 and further 3.9 = 1:6. Now, 7.275 was 1:5, 7.295 was 1:4, 14.225 2:4, 18.110 was 2;5, 21.275 was 1:6, 24.930 was 1:7, 28.300 was 2:4, so not too bad so the internal tuner can do the best.
Hello Ciprian, I think your presentation is helpful and useful. Perhaps you have seen some of Steve Ellington’s YT videos on the EFHW antenna. He has done two specifically about inserting ceramic caps to raise or lower the SWR on a 134’ efhw. One is titled EFHW 80-10 Modification which is designed for the voice portion of the band.. 0:29 Perhaps you might find his information useful.
Thank you so much Lawrence. I don't know if I've seen it. I will go and search for it now... for sure I will find some great and useful info. I do know I watched other videos from Steve and I always had something to learn 😄. 73, YO6DXE... and a happy weekend.
Chip, you need more turns on your choke. Use a bigger toroid 240. You should get 12 turns on with rg58. Less turns it becomes part of the antenna. Get that choke close to your radio. I've never seen any noticeable difference on 10m using a capacitor. You won't get much better on 80m because it's to low to the ground. The trick with the transformer is to stuff it with the largest wire you can fit on reduce the inductive reactance but by the same token you introduce capacity, maybe this is why I don't bother with a capacitor. I've never seen any improvement or regression with a counterpoise, as long as you have 5m or so of coax. Always test at the transformer or you will drive yourself crazy. Get it good at the antenna then you know all other issues are in the feeder, some of which you can't do anything about. There will always have to be some compromise in this antenna, by its very nature it can't be a one trick pony and do everything perfect. But it's good enough. And if you have ever had the pleasure of trying to tune up a fan dipole on 4 bands it will be good enough for us too 🤣
Hahahaha. Ohhh you just told me a few more things I skipped to test so that means more tests this coming week hahaha. Is late now but I will get back with a "radio show" tomorrow to chat a little more. Maybe we can also try some FT8 or FT4 if you have the time. I know this antenna can be all over the place at times... I just wonder how good I could get it ? 🤣🤣 I will move on dipoles later hahaha. First I must get my head around this one. We will see if I will end up in a wall or jump of joy haha. 73 Nigel.
This may be a typo in the diagram or me not quiet understanding but are we feeding the wire from the wrong end, ie coil should be and the extremeity ?. Want to do something similar so very interested in the responses. 73 and thanks for posting.
No no Darrin... I think you have in mind the 110uH inductor for the shortened version of the antenna. This one is not short... is half wave on 80m... so 40m of wire. The coil I use in the video is a compensation coil and has about 0.5uH. Do not confuse it with the 110uH coil. That one yes it goes nearly the end of the antenna... but in my case the compensation coil has to be 2m away from the impedance transformer. 73, YO6DXE.
Hello: One thing I noticed, and maybe you should research, is that I notice you put your input coming RF at the very end of the three turns and the ground at the 3 turn point. My transformers are exactly opposite. the ground is at the end and the 50 ohm input goes to the point of the third turn. I'm not really sure if it would really make any difference or not as the turns primary would be exactly the same? If you run 80 meters I would put the choke at about 13 feet from the transformer. On mine here at the house I had no choice but for it to be close to the antenna so I added a ground wire/counterpoise because that was all I could do. I tried a compensation coil on mine and it didn't work and I think that it was too close to the house and that is why I think mine has some problems; the vertical part of the wire is too close to my house for about 10 feet or so on the vertical rise. I could probably do a major re-do and get it further away from the house. If you do use a capacitor you probably should get a door knob capacitor or at least a good TDK from Mouser or DigiKey. 3KV I may use one on my portable which is what I am building right now. I used a cheep capacitor on my antenna and when I hit it with 500 Watts it shorted it out.
Hi Bruce... ohhh I kept doing a lot of tests and trying all sort of configuration both for the counterpoise and also for the impedance transformer. I have the same issue... the height if the antenna is not what I wish it would be. Is too cold now so I left the antenna alone. But I will continue playing with this one and for sure I will be back with a video of the final version I settle with. We will see how that goes )). Waiting for for warmer weather to come meanwhile. 73, YO6DXE.
Try without the ferrite choke? I use 5-7m counterpoise on my EFHW, no noticeable stray signal in my shack. Or use 'ugly balun' method, at least 5m from the 49:1 unun.
I will sure try the counterpoise as well. A few more tests to make until I will find the best configuration for the antenna I guess ))). The reason why I did wanted to use the ferrite choke is also because it seems that it takes away some ugly electrical noises I used to get in the antenna from neighbors. What I want to try now is to have a counterpoise at the antenna... and use a ferrite choke but in the shack right next to the transceiver. Maybe it will work ? ))
@@dxexplorer using a choke too close to the 49:1 unun is like not letting the antenna stands on its 'two feet'. Yes EFHW is not a dipole, we are feeding it at the ends, but give it at least something to counterbalance. Yes, perhaps it is better to install a choke right before the coax enters your shack.
Makes sense yes. Thank you for this.. I was always so confused because all people have different opinions and some say put it in the shack.. most say put it as close as possible to the antenna... at the end you have no more clue on where is the right place hahaha. But yes is makes sense what you explained and has a logic to it. So I will try this as well. My instinct also tells me that I may also get better results as well ))).
great video Ciprian... . I wonder, will the connection between the bolts and the copper strip be ok on your capacitor holder? eg possible dissimilar metal corrosion?
Good thinking David. I didn't think of that. Maybe I will cancel the copper connections and use something else instead. 😁😁 ... thank you and 73, YO6DXE.
Probably the part between unun an choke is too short. Try 0,05 lambda. Had the same issues and this and two 100pF gave me the solution of having a pretty broadbanded resonant antenna. Every antenna is different, it worked for me. 73 HB3XBL 👍🇨🇭
Thank you so much Mark. I thought I would move the choke close to the transceiver for the new tests this way there would be enough coax left between the impedance transformer and the TRX. Two 100pF capacitors you say about the capacitor from the impedance transformer ? I thought I should try other values but didn't had the chance yet. I will try that as well. Thank you one more time. Fingers crossed I get it to work well as in my dreams hahaha. 73, YO6DXE.
@@dxexplorer I just had one 100pF capasitor in the impedance transformer, but the dips in the swr were at the right place but the swr was over all to high. So I put the second 100pF parallel and the swr came down. Just my way to solve the problem. Later I found out, that other hams did the same. I took 100pF 1 KV others took 4KV just depending on the power they us. I’m QRP Operator. All the best and keep me informed, what works for you. 73 de HB3XBL 👍🇨🇭
My friend YO6BLD told me as well that in his case for a 40m EFHW antenna the best worked a 50pF capacitor. So I will use a variable capacitor to do some tests and find the optimal value, then replaced with a proper capacitor. Thank you again. Ohh yes I will come back with info... and most probably a video too hehe. 73
Trying my best )) Thank you my friend. Let's hope I can make it work as I wish. One more week of tests and measurements I guess hahaha. 73 and have a nice weekend.
@@dxexplorer well I guess you’ll figure it out. You’re smart enough. You can make an inverted V directional. Which is handy. And not so handy at the same time. I’ll see you in the next video. 73!
I try to stay away from directional antennas now ( except sattellites ) as they are too much of a hustle for the conditions I have)). See you next week my friend. 73
So far I am happy about it... but is not yet as I want it. On 80m the SWR is still a bit high... probably because I can't put it higher than 6-7 meters. I need to work a bit more on the compensation coil and then adjust the length of the wire again. Final touch as they say ))). This time I will also use a 4.2m counterpoise to avoid any naughty RF... besides the RF Choke that I now have inside the house next to the transceiver. But on RX... it seems a lot better than the shortened version I had before.
I could if I would move the wooden pole a bit more in the back yes. I think before I started testing the antenna with the compensation coil... I wanted to start with some measurements of the antenna with no modifications on anything. The wire was about 134' only that being too long it was coming down next to the wooden pole. P.S. Thank you for the garden ))
I don't know. I didn't tested that yet. I had one before on my shortened version of the 8010 antenna... the one with the 110uH coil placed almost at the end of the antenna... but I had no nanoVNA back then to see the effect. I will test it now on this one ))
You talk about the RF choke ? I believe yes and yes you are right. I was testing different positions as I was curious about the results. I tried all sort of options recommended by people online. So far the best results I have with the RF Choke in the house close to the transceiver. 73, YO6DXE
I’ve experimented with mine when I had the isolator in the shack I got rf floating around everywhere so put it around 5m from the antenna base seemed to work excellent in stopping noise and rf also didn’t effect the swr either.
That is something I didn't had an issue with. But I think is because I only have 5W in my pocket ))). I am about to replace the antenna wire with a thicker one as winter is nearly here... I will also put the 4.2m of wire as a counterpoise to also avoid the same issue you had. Thanks for reminding me that as I forgot hehe. 73.
That is something I didn't had an issue with. But I think is because I only have 5W in my pocket ))). I am about to replace the antenna wire with a thicker one as winter is nearly here... I will also put the 4.2m of wire as a counterpoise to also avoid the same issue you had. Thanks for reminding me that as I forgot hehe. 73.
I'm on a 435 square meter tiny block. I started with a trapped version of EFHW like yours to get on 80m but any antenna with a trap to get on lower frequencies results in lower bandwidths on that lower band. So I went to a 1/2 wave at 80m NO TRAP (only 40m long and less as I use an inverted vee configuration to fit it into my postage sized piece of land!). It works much better. I can get it to resonate (reasonable SWR) for 40m and 80m...as for other bands I gotta tweak it with my ATU but on HF losses are not so bad. I work mostly QRP. 73 de VK2AOE Video below is that antenna....videos links below that video are to other stumbling antenna efforts :))))) ua-cam.com/video/3pwCa2apN4A/v-deo.html
Thanks so much. I think I've seen the video but I will go watch again ))). I think that inverted V works better on DX also and it becomes nearly omnidirectional. I just need to figure out a way to secure the wooden pole I have in the middle of the garden. The neighbor garden is right next and I would have to install a secure wire for the pole over there )). I must figure out something. I will still play a bit and see if I can get better results... if not I guess it is what it is right ? Hehehe... but even now is not bad... it does well still even with no ATU. 73, YO6DXE and have a great relaxing weekend.
this may help The closer your antenna is to the ground, relative to the wavelength, the more the antenna is “loaded” so the required length of the wire to achieve resonance is shorter. As you go up in frequency the ground has less effect assuming the same height However…the extra wire for the lower bands, affects the resonance on the higher bands lowering the resonance and making the antenna appear longer. My solution for you. Build one or more water proof match boxes that live at the base of the antenna and are optimised for a couple of bands. Make them out of fixed capacitors and coils. Swap them out as you need. Have one for say 80 & 40 but it may be a bit ordinary on 20m, that’s ok, maybe have a tap on the coil to make 20m work and another tap for 80m CW Make a second that does 20, 15 and 10 really well but you may find it ordinary on 40 and unusable on 80 As for the WARC bands, you could tune them too with some more match circuitry. Doesn’t need to be adjustable as once you know the values you need, it should be fine, unless the box fills with water. I use banana plugs into binding posts to connect my antennas to my match boxes. BNC for the coax. Makes it simple to swap out. Plastic bag over the unit keeps it all waterproof Just an idea.
Thank you Chris. Is not a bad idea. I do have a problem as the way I have to install the antenna here ( due to the position of the house etc ), the only way I can do it is from the attic. So the bad part is that every time I would want to change bands I must go up in the attic. I already had enough of that lately after experimenting with this one making adjustments hahaha. I am feeling old now 😅. Your solution though is good as is more "personalized" for each band so I believe the efficiency would be better too. I did noted the detail about the length vs hight as I didn't know exactly how that works. So is good to finally understand the effect of the hight of the antenna. Thank you so much for this. 73, YO6DXE.
@@dxexplorer it’s such a black art, antennas. Everything affects everything else. I guess you could figure out what you need to make each man’s work and relay switch it. Not so much an auto tuner, just a remote tuner / match. George VK2AOE (above) and I have been talking for over 12 months about doing some antenna experiments in the field and measuring what happens when we change just one thing. As for me, my time on the air, with a tiny tiny back yard, much smaller than George’s with room for verticals and mag loops, I’ve found that trying to cover more than an octave of spectrum, eg 3.5-7 or 14-28, isn’t always achievable as once you get over that, you’re running into compromises with either take off angle or lobes in the case of a vertical, or, in the case of a mag loop, significant drops in efficiency as you go below half your top frequency I’m going to take, what I have dubbed, the Back Yard Banger 20/40m vertical and see if we can recreate it at George’s home QTH. There is a video on his channel where we hook mine up on a tripod at his place, and make a few QSOs, drink wine and enjoy the hobby of ham radio Not a bad night on 20m with just 20W I don’t think we had 40m running on it. Keep playing. And watch the “yellow peril” insulation batts in your attic of your have them :-) Talk soon. And get into the CW as soon as you can. It will make QRP so much more rewarding. Trust me on that :-)
O really must get into CW as I find it to be much more fun than anything else. Plus that my dream of making QSO's with crazy simple transceivers or transmitters will finally come true hehehe. This week I will make some time and experiment a bit more with the antenna and see where I get. I either get it perfect as I wanted to be... or have no choices and do compromoses but remain with the comfort of having one antenna for a lot of bands... but not perfect so I will need the ATU at the end. We will see. After that I want to start working on a vertical for 20m for portable work... and another 8010 I stalled as inverted V also for portable. Slow and steady... getting ready for the summer and some SOTA fun )). 73
Neata buna. Am avut la un moment dat insa in afara de cativa amici mai tineri care se mai uita... nu prea se uita nimeni din Romania si cum e mult de munca sa adaug traducerile corecte asa cum ar trebui... nu alea traduse automat de Google de suna ciudat 😁😁 am zis ca nu are rost. Momentan Romania e pe ultimul loc sub 0.2% din vizitatori ... poate mai in colo spre iarna cand mai prind ceva zile mai libere si am vreme sa stau sa traduc fiecare clip. Ia ceva timp totusi ca e de munca sa traduc la atatea clipuri 😁. 73, YO6DXE
@liviugabreanu-yo3fyo354 Suna ciudat rau aia asa ca din topor, dar o sa incerc. Imi e asa de parte tehnica sa nu traduca cine stie ce baliverne si una zic eu alta intelege omul ))
@@dxexplorer Având în vedere că suntem radio amatori și vorbim o engleză mai aproape de tehnică și Nu ceva literar, zic să nu vă chinuiți a traduce dvs. O zi bună.
@liviugabreanu-yo3fyo354 Multumesc la fel. Apoi vedem ce perle scoate Google... daca e ok las asa, daca nu o sa fac asa manual in timp unul cate unul cand am un pic de timp liber. 73, YO6DXE
My 80m EFHW with a coil at 2m, it is resonate 3.560, 15m high horizontal across my yard. I think your antenna is too short. When I first tested 40m was in 6.8 mhz and 13.6 mhz for 20m. I just cut it shorter until I was happy with 40/20m and ended up 1.5 t 1 on 15m and no good on 10m more in 27.9 etc. I made a 1 T 1 balun and put it at my transceiver end on my feed line maybe to choke common mode on the coax or not !! not sure if it helps or not. Its not necessary for me to tune it across the bands but I just nip it up with the tuner in my ic7400 anyhow. regards vk5cz ..
I want to move the choke on the transceiver side as well. The hight of the antenna is something I can't change for now. But I am planing on making it some sort of I verted V to have the middle a bit higher. Mine is the same.. as I do towards 10m the SWR is not as great... but I can still manage that with the tuner. I think with a bit more experimentation I can get it as I want it to be )) I still have to work a bit more on the compensation coil and the value of the 64.1 transformer. I will try to get the best I can and leave it as it is. But I know I tried haha. If not I will always ask myself if I could get it better haha. Thank you for sharing the info. It helps a lot. 73, YO6DXE.
Ciprian, I am sorry that you lost your larger antenna location. I am in the process of building an 80m-10m EFHW based upon the Fair-rite 2643251002 core popularized by Colin MM0OPX.
I realized I have been trying to get too much done with the inductor.
Waters and Stanton, Steve Ellington mention the capacitor in the middle, but Waters and Stanton suggest the most straight forward tuning.
Use your the 80m wire and inductor to get higher bands where you want. Then add capacitance until you raise 80m to where you would like it.
I am not sure what frequencies increase the most when increasing capacitance in the transformer. I think its 10m. Right now I am using 120pf in the transformer that has taps for 49:1, 56:1, and 64:1. The 64:1 definitely lowers SWR on 80m.
I'm still playing with the inductor. The starting point was 9 turns on nominal 1/2" PVC. I am now at 8 turns.
Its still crazy. I need to lower 7m & 20m and raise 15m & 10m. So, I guess I lengthen overall and take out inductance.
The rub is I want 80m primarily for 3.94mHz. I think I will end up using close to 500pf in the middle.
Keep having fun!
Bună! That's the real Ham Spirit: own designs, experiments, building own knowledge and experience. And sharing it with others. Hope to meet you on the air! 73!
So true.... this is why I also love it. 73, YO6DXE.
Wow, love your garden... More like a small farm!!!
Thank you James. Ohhh I wish it was bigger and somehow away from neighbors... I would also keep some bee hives too this way. But it is what it is.
I’ve gone back to experimenting with my EFHW 8010. I have always had a capacitor in line exactly half way along the wire. I never had a compensation coil on the antenna. So I figured out a way to insert a coil without needing to cut and solder the wire. I can add turns to the coil or take turns away easily without cutting or soldering. I can also move the coil position closer to the feed point or slide it farther away. I have made about 14 or 15 different changes and tested each one. My best results so far is having 5 turns on the coil with a 1.25 inch diameter and have the coil placed at 75 inches from the feed point at the output of the transformer. I started with 10 turns and having the coil 78 inches out. So far all of the bands are under 1.7:1 SWR and some are down to 1.05:1. The exception is 30 meters. It is a little over 2.5:1 and needs a little help from a tuner. I’m not done experimenting and will try a few more things. I do not use a RF choke in the feed line and I do not use a counterpoise. I have the ground of the transformer connected directly to a 8 foot ground rod pounded all the way into the ground. To make a sliding coil use a piece of PVC pipe 2 or 3 inches long and use a dremel tool to cut a “J” shaped slot into each end of the pipe. Then you can snap the wire into one J slot on one end and wrap several turns then snap the wire into the other J slot on the other end. The coil will stay in place and not pull out. Then you can loosen the wire on one end and move the loose bit of wire around and around the coil until the coil is tight once again and you have just moved the entire coil position on the antenna. You can also easily unsnap one end of the coil to remove or add turns.
I think the way you build the sliding coil is fantastic. So much easier to make adjustments and experiments. I was curious since I didn't got to test the capacitor in the middle version of the antenna... is it better with the capacitor, or with the compensation coil from what you experimented so far ?
@@dxexplorer I don’t know yet. I have always had the capacitor in line. I will try to short it out and see how it tests.
@glevideo I am also very curious. I've seen commercial versions as well that had both the coil and also the capacitors. I kept telling myself I will test this too, but the free time doesn't want to help at all.
Dear OM, that is very good work and I also like your garden and view. One thought that you may want to look into: There is a large discussion about if you need a counterpoise for an EFHW. I think, it needs one. It is good practise to have a little counterpoise (lambda * 0.05) at the ground from the coax connector of your transformer. Alternativly you can use the shield of the coax between the transformer and the choke. That means you have to consider the lengthe between choke and transformer to be 0.05 lambda of the lowest planned frequency (4 m @ 80 m). EZNEC modelling supports the effect of the counterpoise. Continue the good work and 73 de DD1TA
Good morning and thank you so much. Ohh yes you are right. Initially I wanted to use the coax version but I noticed that placing the rf choke at that distance is was also changing the proprieties of the antenna... not sure why was that... but now I do use a counterpoise and the choke is on the transceiver side. Have a fantastic weekend and 73, YO6DXE.
Hello Ciprian ! Interesting video and a very beautiful place you live. Have a great day my friend.
Thank you so much Klaus. Is a really nice quiet village... we used to have a lot of German people living here in the past. Most houses ( the older ones ) were built my them. A lot of history behind 😀. Wishing you an amazing weekend as well. 73
@@dxexplorer Thankyou, I wish you a good weekend too. Love to you and your family '73's. ♥️
73 my friend... best wishes back to you and your family also.
Beautiful Garden and what a Dream Panorama if you just look out of your Window. Good Job on Endfed Antenna Setup. Happy Weekend & 73 de Uncle Günter 🙋♂
Thank you so much... ohhh the view is from the attic... but I do enjoy it often these days as I'm always up and down testing and experimenting with the antenna hahaha. The garden does looks nice from the spring all the way in the fall. I like this place. 73 and have a great weekend, YO6DXE.
I will suggest that you try adjusting the transformer coil a little by squeezing the coils closer together or spreading them apart. This makes a difference. I noticed you 80 meter had high SWR at the low end but the impedance was just about right and very close to 50 ohms. When you moved the VNA marker higher in frequency and the 80 meter SWR came down to about 1.5:1 the impedance went way low. Some adjustment in the transformer coil will change this. You might even need to remove one turn of the toroid coil.
Yes indeed. I only learned about this afterwards. It took a lot of headaches hahaha and experiencing with both the 49:1 and also the 64:1 transformers to see what works better. Also another problem I noticed was the placement of the RF choke. Since I moved it close to the transceiver the results are way better... and also the type of RF choke seems to matter a lot too. Now I no longer have this antenna as I moved into a new place and I don't have as much space. I am working on building the shortened version that has the coil at the end almost. But talking about the RF choke... while testing the new antenna I realized I had 1:1.3 with the coax RF choke type... and 1:1.04 with the one made with parallel insulated wires. Impedance was the same on both. Is nice in a way that I get to learn and experiment and realize how everything interacts together and influence the result at the end. With headaches or not... is the best hobby as I learned more now than ever. Love it. Thank you for the tips as well. 73, YO6DXE.
I have a shortened version as not enough room for a longer wire just has a narrow band width on 80m just have use atu
I want to build a shortened version for portable... but I won't use 110uH... but 55uH and extend the end to 3-4m depending on what's necessary. I will also try to use some thick wire for the coil... 1 or 1.5mm. These should help a bit with the bandwidth on 80m.
Hello!, Nice video, compliments. i did a lot of experiment on my inv L 8010 with vertical size abt 10m and the rest in horizontal. Two observations about counterpoise and compensation coil: 1 Conuterpoise is too short, generally minimum lenght is 5% of lower band, in this case 4m. I tested this solution and it was good but in my case the best solution is with 3 or more radials 4m long. RF choke is no more necessary because corrents flow thru the counterpoises (radials). 2) compensation coil: initially I built a compensation coil similar to yours, but after studies and experiments the better results was with 7 coils on 32 mm pipe.
Grazie Franco. I use no radials at all on mine. I don't have the space )). I also wanted to try putting a little bit of wire vertical... but the way the house is ... it doesn't allow me to do that. I will try to rebuild the compensation coil as you did yours because I think mine is not yet perfect. But I stopped at this one because I had no more time to experiment ))). I will try to see how I can use some radials at least ( counterpoise ). So far I didn't had problems with common more curent... but is better to be safe ). Thank you one more time. 73, YO6DXE.
@@dxexplorer 👍 73's and good experiments de iw2hus, Franco
Thank you so much. I will get back to you and let you know how it worked. I must buy you a beer 🍺 😅.
Hello, Ciprian I use 2 common mode chokes for this antenna, first one .05 lamda down from feedpoint which is calculated for the lowest band of operation. Calculations are 0.05×80M band = 4M. I wind 8 turns of the feedline around a 240.43 toroid down from feedpoint and another one before entering the shack. This eliminates rf on feedline. Hope this helps and keep up the good work.
73 de
Aiden EI8HJB.
Thank you so much. This helps a lot. I only have the FT140-43 to make the chokes now... but they should be ok for now. 240-43 are a bit expensive for me haha. I will need to get four of them to build a proper antenna ( 2 chokes and the transformer built on a double stack ). Ohhh and thank you for the calculations ... that helps a lot. I will come back with another video on the antenna sometime this summer for sure. 73, YO6DXE.
I was looking for a frequency of 3.8 MHZ and club net of 3.9 mhz. A 49:1 transformer with a 122.5' wire did the job. I was looking for that range, but it can be longer or shorter for desired range, with no tuner. If you align for 3.5 Mhz, all other bands fit. When tweaking, some bands become less resonant.
I did some experiments last week I beleive... I will be back with a video on the results. Playing a bit with everything.. the compensation coil, the impedance transformer etc. Strange and interesting results comparing to the theory of it ))). I want to try they way you made it as well and put all on paper... for future reference hehe. Thank you. 73, YO6DXE.
@@dxexplorer Yes, I believe when I was looking for 80 meters first, then all other bands came up good. That for SSB . 122' 6", was resonant in all other bands up to 6 meters. The SWR was so low, so if necessary, the internal tuner could do it.
I try to see if I can get the SWR no bigger than 1.5:1 on all bands from 80m to 10m. No luck so far, but that is the fun in experimenting. At least we can try haha. We will see how things work out.
@@dxexplorer 80 for me was, 3.780 1:1, 3.8 = 1:1 and further 3.9 = 1:6. Now, 7.275 was 1:5, 7.295 was 1:4, 14.225 2:4, 18.110 was 2;5, 21.275 was 1:6, 24.930 was 1:7, 28.300 was 2:4, so not too bad so the internal tuner can do the best.
Hello Ciprian, I think your presentation is helpful and useful. Perhaps you have seen some of Steve Ellington’s YT videos on the EFHW antenna. He has done two specifically about inserting ceramic caps to raise or lower the SWR on a 134’ efhw. One is titled EFHW 80-10 Modification which is designed for the voice portion of the band.. 0:29 Perhaps you might find his information useful.
Thank you so much Lawrence. I don't know if I've seen it. I will go and search for it now... for sure I will find some great and useful info. I do know I watched other videos from Steve and I always had something to learn 😄. 73, YO6DXE... and a happy weekend.
Chip, you need more turns on your choke. Use a bigger toroid 240. You should get 12 turns on with rg58. Less turns it becomes part of the antenna. Get that choke close to your radio.
I've never seen any noticeable difference on 10m using a capacitor.
You won't get much better on 80m because it's to low to the ground.
The trick with the transformer is to stuff it with the largest wire you can fit on reduce the inductive reactance but by the same token you introduce capacity, maybe this is why I don't bother with a capacitor.
I've never seen any improvement or regression with a counterpoise, as long as you have 5m or so of coax.
Always test at the transformer or you will drive yourself crazy. Get it good at the antenna then you know all other issues are in the feeder, some of which you can't do anything about.
There will always have to be some compromise in this antenna, by its very nature it can't be a one trick pony and do everything perfect. But it's good enough. And if you have ever had the pleasure of trying to tune up a fan dipole on 4 bands it will be good enough for us too 🤣
Hahahaha. Ohhh you just told me a few more things I skipped to test so that means more tests this coming week hahaha. Is late now but I will get back with a "radio show" tomorrow to chat a little more. Maybe we can also try some FT8 or FT4 if you have the time. I know this antenna can be all over the place at times... I just wonder how good I could get it ? 🤣🤣 I will move on dipoles later hahaha. First I must get my head around this one. We will see if I will end up in a wall or jump of joy haha. 73 Nigel.
This may be a typo in the diagram or me not quiet understanding but are we feeding the wire from the wrong end, ie coil should be and the extremeity ?. Want to do something similar so very interested in the responses. 73 and thanks for posting.
No no Darrin... I think you have in mind the 110uH inductor for the shortened version of the antenna. This one is not short... is half wave on 80m... so 40m of wire. The coil I use in the video is a compensation coil and has about 0.5uH. Do not confuse it with the 110uH coil. That one yes it goes nearly the end of the antenna... but in my case the compensation coil has to be 2m away from the impedance transformer. 73, YO6DXE.
Hello: One thing I noticed, and maybe you should research, is that I notice you put your input coming RF at the very end of the three turns and the ground at the 3 turn point. My transformers are exactly opposite. the ground is at the end and the 50 ohm input goes to the point of the third turn. I'm not really sure if it would really make any difference or not as the turns primary would be exactly the same? If you run 80 meters I would put the choke at about 13 feet from the transformer. On mine here at the house I had no choice but for it to be close to the antenna so I added a ground wire/counterpoise because that was all I could do. I tried a compensation coil on mine and it didn't work and I think that it was too close to the house and that is why I think mine has some problems; the vertical part of the wire is too close to my house for about 10 feet or so on the vertical rise. I could probably do a major re-do and get it further away from the house. If you do use a capacitor you probably should get a door knob capacitor or at least a good TDK from Mouser or DigiKey. 3KV I may use one on my portable which is what I am building right now. I used a cheep capacitor on my antenna and when I hit it with 500 Watts it shorted it out.
Hi Bruce... ohhh I kept doing a lot of tests and trying all sort of configuration both for the counterpoise and also for the impedance transformer. I have the same issue... the height if the antenna is not what I wish it would be. Is too cold now so I left the antenna alone. But I will continue playing with this one and for sure I will be back with a video of the final version I settle with. We will see how that goes )). Waiting for for warmer weather to come meanwhile. 73, YO6DXE.
Try without the ferrite choke? I use 5-7m counterpoise on my EFHW, no noticeable stray signal in my shack. Or use 'ugly balun' method, at least 5m from the 49:1 unun.
I will sure try the counterpoise as well. A few more tests to make until I will find the best configuration for the antenna I guess ))). The reason why I did wanted to use the ferrite choke is also because it seems that it takes away some ugly electrical noises I used to get in the antenna from neighbors. What I want to try now is to have a counterpoise at the antenna... and use a ferrite choke but in the shack right next to the transceiver. Maybe it will work ? ))
@@dxexplorer using a choke too close to the 49:1 unun is like not letting the antenna stands on its 'two feet'. Yes EFHW is not a dipole, we are feeding it at the ends, but give it at least something to counterbalance. Yes, perhaps it is better to install a choke right before the coax enters your shack.
Makes sense yes. Thank you for this.. I was always so confused because all people have different opinions and some say put it in the shack.. most say put it as close as possible to the antenna... at the end you have no more clue on where is the right place hahaha. But yes is makes sense what you explained and has a logic to it. So I will try this as well. My instinct also tells me that I may also get better results as well ))).
great video Ciprian... . I wonder, will the connection between the bolts and the copper strip be ok on your capacitor holder? eg possible dissimilar metal corrosion?
Good thinking David. I didn't think of that. Maybe I will cancel the copper connections and use something else instead. 😁😁 ... thank you and 73, YO6DXE.
Probably the part between unun an choke is too short. Try 0,05 lambda.
Had the same issues and this and two 100pF gave me the solution of having a pretty broadbanded resonant antenna.
Every antenna is different, it worked for me. 73 HB3XBL 👍🇨🇭
Thank you so much Mark. I thought I would move the choke close to the transceiver for the new tests this way there would be enough coax left between the impedance transformer and the TRX. Two 100pF capacitors you say about the capacitor from the impedance transformer ? I thought I should try other values but didn't had the chance yet. I will try that as well. Thank you one more time. Fingers crossed I get it to work well as in my dreams hahaha. 73, YO6DXE.
@@dxexplorer I just had one 100pF capasitor in the impedance transformer, but the dips in the swr were at the right place but the swr was over all to high. So I put the second 100pF parallel and the swr came down. Just my way to solve the problem.
Later I found out, that other hams did the same. I took 100pF 1 KV others took 4KV just depending on the power they us. I’m QRP Operator.
All the best and keep me informed, what works for you. 73 de HB3XBL 👍🇨🇭
My friend YO6BLD told me as well that in his case for a 40m EFHW antenna the best worked a 50pF capacitor. So I will use a variable capacitor to do some tests and find the optimal value, then replaced with a proper capacitor. Thank you again. Ohh yes I will come back with info... and most probably a video too hehe. 73
Well explained .
Trying my best )) Thank you my friend. Let's hope I can make it work as I wish. One more week of tests and measurements I guess hahaha. 73 and have a nice weekend.
@@dxexplorer well I guess you’ll figure it out. You’re smart enough. You can make an inverted V directional. Which is handy. And not so handy at the same time.
I’ll see you in the next video.
73!
I try to stay away from directional antennas now ( except sattellites ) as they are too much of a hustle for the conditions I have)). See you next week my friend. 73
Great stuff let me know how u get on
So far I am happy about it... but is not yet as I want it. On 80m the SWR is still a bit high... probably because I can't put it higher than 6-7 meters. I need to work a bit more on the compensation coil and then adjust the length of the wire again. Final touch as they say ))). This time I will also use a 4.2m counterpoise to avoid any naughty RF... besides the RF Choke that I now have inside the house next to the transceiver. But on RX... it seems a lot better than the shortened version I had before.
Meant to add that Ellington’s videos provide solid information.
N4LWT
I very much agree on that. I found the video 😄😄. Thank you a lot.
@@dxexplorer You are welcome. Out of curiosity could you lengthen your wire to 134’. Nice looking garden you have plus such a scenic view.
I could if I would move the wooden pole a bit more in the back yes. I think before I started testing the antenna with the compensation coil... I wanted to start with some measurements of the antenna with no modifications on anything. The wire was about 134' only that being too long it was coming down next to the wooden pole. P.S. Thank you for the garden ))
Should a short counterpoise effect your swr? I have heard all kind of answers. In my case, it effects some bands like 10m.
I don't know. I didn't tested that yet. I had one before on my shortened version of the 8010 antenna... the one with the 110uH coil placed almost at the end of the antenna... but I had no nanoVNA back then to see the effect. I will test it now on this one ))
@@dxexplorer I have to get a nanoVna as well. Great tool. Wish you a lot of contacts.
Thank you Nikos. Wishing you the same my friend. Ohhh yes the nanoVNA has been such a great help so far.
U have the isolator too close to the transformer needs to be at least 4m away or will effect the swr
You talk about the RF choke ? I believe yes and yes you are right. I was testing different positions as I was curious about the results. I tried all sort of options recommended by people online. So far the best results I have with the RF Choke in the house close to the transceiver. 73, YO6DXE
I’ve experimented with mine when I had the isolator in the shack I got rf floating around everywhere so put it around 5m from the antenna base seemed to work excellent in stopping noise and rf also didn’t effect the swr either.
That is something I didn't had an issue with. But I think is because I only have 5W in my pocket ))). I am about to replace the antenna wire with a thicker one as winter is nearly here... I will also put the 4.2m of wire as a counterpoise to also avoid the same issue you had. Thanks for reminding me that as I forgot hehe. 73.
That is something I didn't had an issue with. But I think is because I only have 5W in my pocket ))). I am about to replace the antenna wire with a thicker one as winter is nearly here... I will also put the 4.2m of wire as a counterpoise to also avoid the same issue you had. Thanks for reminding me that as I forgot hehe. 73.
support this man so he can buy markers that work lol
Hahahaha... I am lucky. The guys at the hardware store made me a present a few good markers 😅😅😅
Try a Bifilar Common mode Choke.
That is what I use at the moment. Seems to work much better than a simple coax one. 73, YO6DXE
I'm on a 435 square meter tiny block. I started with a trapped version of EFHW like yours to get on 80m but any antenna with a trap to get on lower frequencies results in lower bandwidths on that lower band. So I went to a 1/2 wave at 80m NO TRAP (only 40m long and less as I use an inverted vee configuration to fit it into my postage sized piece of land!). It works much better. I can get it to resonate (reasonable SWR) for 40m and 80m...as for other bands I gotta tweak it with my ATU but on HF losses are not so bad. I work mostly QRP. 73 de VK2AOE
Video below is that antenna....videos links below that video are to other stumbling antenna efforts :)))))
ua-cam.com/video/3pwCa2apN4A/v-deo.html
Thanks so much. I think I've seen the video but I will go watch again ))). I think that inverted V works better on DX also and it becomes nearly omnidirectional. I just need to figure out a way to secure the wooden pole I have in the middle of the garden. The neighbor garden is right next and I would have to install a secure wire for the pole over there )). I must figure out something. I will still play a bit and see if I can get better results... if not I guess it is what it is right ? Hehehe... but even now is not bad... it does well still even with no ATU. 73, YO6DXE and have a great relaxing weekend.
this may help
The closer your antenna is to the ground, relative to the wavelength, the more the antenna is “loaded” so the required length of the wire to achieve resonance is shorter.
As you go up in frequency the ground has less effect assuming the same height
However…the extra wire for the lower bands, affects the resonance on the higher bands lowering the resonance and making the antenna appear longer.
My solution for you.
Build one or more water proof match boxes that live at the base of the antenna and are optimised for a couple of bands. Make them out of fixed capacitors and coils. Swap them out as you need.
Have one for say 80 & 40 but it may be a bit ordinary on 20m, that’s ok, maybe have a tap on the coil to make 20m work and another tap for 80m CW
Make a second that does 20, 15 and 10 really well but you may find it ordinary on 40 and unusable on 80
As for the WARC bands, you could tune them too with some more match circuitry.
Doesn’t need to be adjustable as once you know the values you need, it should be fine, unless the box fills with water.
I use banana plugs into binding posts to connect my antennas to my match boxes. BNC for the coax. Makes it simple to swap out. Plastic bag over the unit keeps it all waterproof
Just an idea.
Thank you Chris. Is not a bad idea. I do have a problem as the way I have to install the antenna here ( due to the position of the house etc ), the only way I can do it is from the attic. So the bad part is that every time I would want to change bands I must go up in the attic. I already had enough of that lately after experimenting with this one making adjustments hahaha. I am feeling old now 😅. Your solution though is good as is more "personalized" for each band so I believe the efficiency would be better too. I did noted the detail about the length vs hight as I didn't know exactly how that works. So is good to finally understand the effect of the hight of the antenna. Thank you so much for this. 73, YO6DXE.
@@dxexplorer it’s such a black art, antennas. Everything affects everything else.
I guess you could figure out what you need to make each man’s work and relay switch it. Not so much an auto tuner, just a remote tuner / match.
George VK2AOE (above) and I have been talking for over 12 months about doing some antenna experiments in the field and measuring what happens when we change just one thing.
As for me, my time on the air, with a tiny tiny back yard, much smaller than George’s with room for verticals and mag loops, I’ve found that trying to cover more than an octave of spectrum, eg 3.5-7 or 14-28, isn’t always achievable as once you get over that, you’re running into compromises with either take off angle or lobes in the case of a vertical, or, in the case of a mag loop, significant drops in efficiency as you go below half your top frequency
I’m going to take, what I have dubbed, the Back Yard Banger 20/40m vertical and see if we can recreate it at George’s home QTH. There is a video on his channel where we hook mine up on a tripod at his place, and make a few QSOs, drink wine and enjoy the hobby of ham radio
Not a bad night on 20m with just 20W
I don’t think we had 40m running on it.
Keep playing. And watch the “yellow peril” insulation batts in your attic of your have them :-)
Talk soon. And get into the CW as soon as you can. It will make QRP so much more rewarding. Trust me on that :-)
O really must get into CW as I find it to be much more fun than anything else. Plus that my dream of making QSO's with crazy simple transceivers or transmitters will finally come true hehehe. This week I will make some time and experiment a bit more with the antenna and see where I get. I either get it perfect as I wanted to be... or have no choices and do compromoses but remain with the comfort of having one antenna for a lot of bands... but not perfect so I will need the ATU at the end. We will see. After that I want to start working on a vertical for 20m for portable work... and another 8010 I stalled as inverted V also for portable. Slow and steady... getting ready for the summer and some SOTA fun )). 73
Bună, adăugați și traducere în RO.
Neata buna. Am avut la un moment dat insa in afara de cativa amici mai tineri care se mai uita... nu prea se uita nimeni din Romania si cum e mult de munca sa adaug traducerile corecte asa cum ar trebui... nu alea traduse automat de Google de suna ciudat 😁😁 am zis ca nu are rost. Momentan Romania e pe ultimul loc sub 0.2% din vizitatori ... poate mai in colo spre iarna cand mai prind ceva zile mai libere si am vreme sa stau sa traduc fiecare clip. Ia ceva timp totusi ca e de munca sa traduc la atatea clipuri 😁. 73, YO6DXE
Păi să o facă UA-cam automat și ar fi destul.
@liviugabreanu-yo3fyo354 Suna ciudat rau aia asa ca din topor, dar o sa incerc. Imi e asa de parte tehnica sa nu traduca cine stie ce baliverne si una zic eu alta intelege omul ))
@@dxexplorer Având în vedere că suntem radio amatori și vorbim o engleză mai aproape de tehnică și Nu ceva literar, zic să nu vă chinuiți a traduce dvs. O zi bună.
@liviugabreanu-yo3fyo354 Multumesc la fel. Apoi vedem ce perle scoate Google... daca e ok las asa, daca nu o sa fac asa manual in timp unul cate unul cand am un pic de timp liber. 73, YO6DXE
👍good video, (VU3RFN )
Thank you so much. Still learning new things about this antenna. 73, YO6DXE