Видео

@@slide4417 You welcome! If you are using the FT8CN app to download the log file you tap the arrow down icon on up left of the logs tap of the app and that will tell you what's the IP number to enter on your browser so you can access the FT8CN menu with the log files. This software interface is just like a http page that connects to your local network.

@@ncphotos Thank you!

These are the initial sizes, then you have to adjust the sizes on the tip of the elements for tuning. Antenna Dimensions and Materials: Driven elements: 2m.44cm x 2 = 4m.88cm Reflector element: 5m.62cm 4 carbon fiber fishing rods 6 feet of 1" PVC pipe 1:1 balun 1 roll of aluminum tape Some 12 gauge coper wire This video is where I started this project. ruclips.net/video/cOHlUzsSSWs/видео.html

A lot of hams run, portable out of our vehicle. We’re able to carry more gear and put up larger antennas.

Stationery mobile

The size of a Honda Civic, lol.

@@stefanrudorfer4317 Thank you so much! 73

@@Nolan-N4NJM hey Nolan thank you so much! I'm so happy that you saw the vid. I didn't want to go in details and take time of your activation. This antenna is made of carbon fiber fishing poles and aluminum tape wrap around. I built in January of this year and I made a video back then with all the measurements than put it away. Now this bands are really nice so I brought back out again. Hope to hear you on frequency my friend, 73

I love the video! I can always make time to talk about interesting antennas! I’ve built a lot of wire antennas, but never anything like this i’m definitely gonna go back and check out your previous videos. It’s very interesting, I may try something like this myself.

@@NAVYABHAN I noticed that but since this is just for portable operation is fine.

@@NAVYABHAN that's exactly what I do and I have a pile of parts that I used in projects like this.

@@DK5ONV hey Gunter good to hear from you. Yes I agree I will be doing more ssb phone with this antenna for sure and I will be looking for buddy. 73's my friend.

@@iu1olr hello the distance is 6 feet and I used a PVC pipe. There's a link on description for the other measurements.

@@markb3769 You welcome Mark! I hope you have fun with your project 73 my friend!

Project was 100% Success and 100% Fun! Now I have a new toy. I had previously attempted to reply with a external link to a post I did on Reddit. That posted started with a huge thanks to both you for this video and Mike Yamamoto for his guide, as well as some photos. Unfortunately RUclips censored it for the external link. :(

@markb3769 hey Mark I'm happy to hear that worked for you! You are gonna love this antenna. 73s my friend.

@@MrTonyd1954 yes I did a couple QSO on 20m but I was trying more on the ft8 mode which I don't have to change the frequency all the time.

@@craigmaxey4334 Thank you so much I appreciate! I will try with my other antennas as well. 73's

@@Philip-KA4KOE depending on the frequency is about 250kh and lately I found that on horizontal plane is more broadband.

Thank you so much! I finished a new IR remote tuning which helps a lot, I will make a new video soon. 73 my friend.

@@N8ESP Thank you so much I appreciate! A 3d printer is a huge part of my antennas building you will love it. Best 73's my friend.

Thank you so much I appreciate! I really had fun doing this project. The performance of the antenna since it was my first one it was adequate. I just finished a better remote tuning system which I will make a vid about that. 73's my friend

@@NamasenITN I use for outdoor only if is not raining.

@@vetinger Depending what frequency 20w maximum

@@DK5ONV Thank you Gunter! Since this was my first setup I cut it the wire a little too short so I added another meter is at 43m now I like to he more a the beginning of the band. Have a great week my friend looking forward to our first QSO. Best 73's uncle Gunter!

@@brianfields4479 Thank you so much Brian! Is one of my favorites for sure. 73's my friend.

@@outnaboot hey Stuart thank you so much I appreciate! Love your channel 73's my friend.

@@krisbour5130 that was for 20m, now I have this antenna in my backyard. 73's

@@VE3DAL thanks F4LMY

@@eriphoor You very welcome! I'm just finishing the new updates on the infrared remote tuning. 73's

@@brianfields4479 Thank you so much I appreciate ! I used the 1:1 because is easier for me with that 3d clamp that I printed. Good luck with your new qrp antenna hope to hear you as well. 73's my friend

@@DK5ONV Hey Gunter ! Yes me too, this magloop is no that easy but sometimes magic happens with this antenna. Have a great week my friend and nice to see you doing well. Best 73's

@@dennis8019 I got on Ebay there is a link on the previous video.

@@danielzdanowicz6899 Thank you for the great feedback! It seems that I can't get to the 10m , my capacitance starts at 22pF with this system. Since this is my first MLA I will build some others for sure. Thanks again best 73's.

That loop should tune the low end of ten meters. You may need to reduce the capacitance to get higher in frequency. Possibly switch in a door knob capacitor in series. Also vary the coupling with the exciter loop moving it up or down the shaft a bit. If you smith chart it on a Nano VNA it should tell you what direction your experiment should go. One thing that might be worth trying too using a Delran plastic coupling between your gear works and the capacitor shaft which would further assure there is no coupling leakage at that end of the capacitor. Just some thoughts from afar. 73s

@@danimac3953 I will check that door knob capacitor for sure. I was thinking at first to reduce the size of the main loop and compromise the 20m and that would be ok because I'm thinking to build another one. There are so much into this antenna and that's what I like. Thank you so much for the tips. 73's my friend

@@VE3DAL reducing the size of the loop would definitely accommodate getting higher on ten but would compromise performance on 40 which might force a decision to be made as which end of the spectrum is more important in the scheme of things. One thing to keep in mind surface area is critical to loop efficiency. Do not use a thinner radiation loop. What you are learning from these experiments will make you the local authority on MLAs. Great work!

@@danimac3953 to tell you the truth I never try 40m on this antenna I only took a SWR reading because I knew the efficiency wasn't there due to the size. I have a quite a few feet of KMR400 coax cable to spare, where I'm thinking to do some sort of 8 figure loop to get that 40m back again. I took a quick look at door knob capacitor but I'm not to familiar how would that work comparing to the variable capacitor where you control the capacitance. I appreciate your knowledge.

@@alexandreberra Sim mágica mesmo, obrigado! 73's

@@Pivotal_Moment Hey Peter thank you so much I appreciate! There will be some new updates about this antenna coming soon. Best 73's my friend!

@@larrypicard5969 Thank you so much for the excellent feedback. I'm very new on MLA and any information is very helpful. My next goal is to figure out to make tuning remotely. I have a very small 12V motor with reduction gears with a controller forward and reverse that I used for my timelapse photography on rails, I'm thinking to give a shot with that. The gears that will be touching the capacitor I will make on my 3d printer. Also I will figure out how to do a better connection on the components by soldering. I will check your QRZ page. Best 73's my friend!

@@danimac3953 Hello Dani, thank you so much for your feedback! This was my first MLA , my skills on electronics are very limited and I have a lot of questions. You answer on of them that soldering the components are better than tie them with bolts and nuts. I been getting very good SWR 1:1 but I think the efficiency of this antenna is maybe 50% or less. I have some better ideas as the project still going. At the feed point I have some ferrite beads on the coax I'm not sure if helps. Wow you have been operating for a very long time that's awesome! Best 73's my friend!

@@VE3DAL Thanks for the reply. Your efforts are commendable for the first attempt. You are doing the right things. The diameter of a meter is about optimum for 40 through 10. Any longer and you would start getting lumped constants of rf current which should be avoided. A loop like yours with soldered connections and minimized mechanical IR losses can be up to 88% efficient on 20 meters even with as much as a 1.5:1 SWR. With 50% efficiency I might suspect higher than normal mechanical losses. This would usually result in "heat loss" due to the high currents normally flowing through the loop components. This can be tested quickly with extended key down time and say 35 to 40 watts, while watching the SWR meter slowing creeping up as the elements heat up. With the size of your variable cap, I would suspect it could easily handle 25 watts digital, 45 watts cw and 75 watts of SSB, and maybe even 90 watts of SSB with a balun in the feed line. However at those power levels the voltage on the cap would be in the thousands and many amps of RF on the loop. Needless to say... never contact any component of the loop under power, as the RF burns would be extremely severe. Even at 5 watts it will render a "bite" that you will not forget for a long time. RF exposure is also a concern with these types of antennae, so it is recommended to stay perpendicular to the loop plane, where the deepest null (approximately 20dB) is for safety. IF the loop is hard to tune, or the SWR changes when you touch or get near the feed line coax, and / or changes with rotating the loop you would most like have common mode currents (CCMCs) on the coax and should use the balun I mentioned earlier. The MLA magnetic "H" field is effective for a distance of about three or so loop diameters from the loop making it less bothered by surrounding (unless those surroundings are metallic), after which it starts performing like a regular antenna "E" field there out to its destination. If the "H" field is vertical, the "E" field will be horizontal. Being a Mag Loop everything is backwards from an ordinary antenna. Such as... ordinary short antennas are capacitive and need a coil to load (ie a short coil loaded vertical such as a Buddistick) where as... a small MLA is inductive and needs a capacitor to load it to resonance. The vertical mounted MLA sends out a vertical "H" field, but then dissipates and the horizontal "E" field takes over giving the small vertical ground mounted loop the equality of performance of a dipole "at height". In some cases the MLA will actually out perform a dipole, which makes the MLA a big favorite for portable ops. The MLA some times gets a bad rap from the grouchy old timers out there because they don't understand anything other than a dipole and are not willing to explore the technology of this type antenna. (Some OTs will never change... hi hi) If you can put up with the high Q of a MLA, it can be your best antenna solution for many circumstances, such as stealth ops in an antenna restrictive HOA or POTA ops where trees are limited or don't accommodate an EFHW wire. I have personally worked 7800 miles on an Alexloop one loop diameter above the ground with 10 watts on FT8... Not bad in my book. Best of luck on your continued experimentation. Have fun! 73s, Dan K1YPB

@@danielzdanowicz6899 Hey Dan, thank you so much for the info very helpful! I love to explore new technology and the challenges that comes with it, and MLA is one of them. This afternoon I changed the capacitor to be on top and the coupling at the bottom and I didn't noticed much of difference. I'm aware of the danger from this antenna, but is always great to know even more information about it. Thank you again I loved your comment. Best 73's my friend!

@@alexandreberra Muito obrigado!

@@geirha75 Thanks for the feedback! I very new on magloop antennas, yes it does work with a smaller capacitor it will be limited on output power. I'm still try to learn what band needs how much capacitance.

@@johnnorth9355 Hi John, thank you for your feedback. For me definitely still a mystery everything about it, and that's what I liked. It will keep me going for future modifications. My next goal is to test at the cottage can't wait for that! Best 73's my friend.

@@DK5ONV Hey Gunter! Absolutely I will try that because one thing I was getting a lot of noise as it is. At first I thought it was my neighborhood. My next goal is to take to the park but this type of antenna some logistics good sense has to happen. I hope you are doing better and good luck my friend 73! Gunter buddy

I have not, that's another area I have to explore.

​@@VE3DALyou could see if you can receive 2 meter signals and not transmit for now. Listen on FM and ssb if possible. I used to do a lot of 2 meter ssb. I could reach out to max 400 miles.

I think this way of thinking it works better if you have a free environment around, if you don't like myself at home it will pickup a lot noise level like s5 s7 where I'm.

​@@VE3DALThe good thing at the lake you can turn the loop! I was going to ask you did you have trouble with the tripod falling over without guy wire. I could see if you a peg or something in the ground under the tripod?

@@jamesabc372 I had three spikes in the ground on each leg of the tripod.

​@@VE3DALMy loop will be on cement with tripod,so I will have to guy.

BTW I did get the 45 degree elbows on line.😊

Like I said I never worked with window line yet and I heard that the window line can't have any type of metal close by to work properly, that would be an issue for me. I'm also planning to put a 20m delta loop where I have the 10m loop instead.

​@@VE3DALthat's a good move 20m! Just not too high. I'm thinking about 8 or 9 ft max

​@@VE3DALmaybe you can find some 7.2m fiberglass fishing rods.

@@jamesabc372 yes some where lower than what is now.

@@jamesabc372 I got some at 6.5m max.

Thank you so much ! I actually tried already and I agree is much easier sometimes with the multiple bands setup you end up using one or maybe two bands. Best 73's my friend.

Driven elements: 2m.44cm x 2 = 4m.88cm Reflector element: 5m.62cm Boom 6 feet Thank you!