MAGNETIC LOOP 40M - 10M Built by 2E0ERO
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- čas přidán 11. 07. 2024
- Here we take a look at the principles of a transmitting magnetic loop and then test a magnetic loop built by 2E0ERO.
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Nice looking antenna, well built, reminds me of a few times I worked some DX off my Cantenna Dummy Load sitting on the shack floor!. always got a chuckle out of that!. I also worked a guy on 6m one time that loaded up his Volkswagen bumper! Cheers es 73!
A beautiful built Mag Loop and the Receive combined with the FT-991A sounds excellent to my ears
Excellent antenna - had some great results here.
People commenting on the loop's efficiency compared to randoms and dipoles apparently have no idea over conditions in a city/apartment, not to mention HOA restrictions. A loop is a godsend design for people like us, and when properly tuned and amplified, they work wonders. You may not be catching any Brasilian AM stations, but they still offer some great DX opportunities.
Agreed! Yes, some obnoxious know-it-alls wish to remain ignorant of both some of our housing and HOA restrictions as well as the limited physical capabilities of some of us that keep us from hanging off ladders 20 feet up. Yes, mag loops can help us out.
I have one of these, works great for digital modes in flat. I've been meaning to build an autotuner for it.
Beautiful!
Why is it that every time I watch one of you videos, I want to spend money?
Sorry, not sorry 😜👍
'E's a bad man.
His videos has that effect on me also!
Super, thx, cheers 73
Howdy. Beatiful crafting.
Some have got better SWR using an oval driver loop.
I got SWR = 1 using gamma match on my 27 MHz CB loop.
Regards.
"Repeat please"- Delta Queen Whiskey -(5 times) yeah 5/9! LOL Gotta love those HF reports!. Nice video
Haha.. that’s the beauty of QSB lol
@@TechMindsOfficial or Southern-English speech-inflection LOL
Or he was confused by the Queen. There is a reason behind the international phonetic alphabet.
That's what you get from a contest. 5/9.. repeat your call ? LOL they are nonsense but i won't start . It's just a 5/9 for the log but you'll never know the real report wich is a basic thing to tell .
Yeah the QSB is a Rollercoaster Ride 🎢 fading in and out. Would be a 5/9 if the band Conditions were better
been meaning to order one and i just have
Matt, what is the net effect of winding the outer loop (tuned element) of the antenna? Can you reduce circumference for say a 80m - 40m MLA by coiling? I've seen online calculators that imply that loop circumference is critical to the antenna efficiency at any particular frequency (along with the diameter of the loop material). Can you somehow net a more compact loop for lower frequencies? I assume that there is parasitic capacitance when you do so?
Being directional then having to tune the antenna would get old, but if space is a concern this would be a great option. It would also work good for people with deed restrictions/HOA. But man, that is one nice looking loop!
Nay, you don't get old because you get used to it . Also the magloop let you listen...where some ( because the noise ) classic aerials fail.
I have one of these and it works well, mine is in the loft and right next to a velux window. only downsides i can see is its not waterproof, so not suitable for full time outside and the switch has to be manually switched to extend the range.
I wonder if this type of antenna can help people get around planning regulations? Would such an antenna be measured by local authorities by its diameter or circumference? Another thought I had is that a very fast spinning magnetic loop antenna could be omnidirectional.
I like the looks of this antenna and was interested in buying one but I can't find a vendor. Where can I get one?
I realise this is an old video and i still have my 2e0ero loop too, did you experiment with a rotator?
Thanks for the video! On disadvantages you mentioned that the loop antenna had a narrow bandwidth but I suppose it is not a disadvantage because to tune this antenna in we must always use the capacitor.
Imagine to use a Notch . That's a magloop. Wich is REALLY good to fight the noise and to let you listen .
I have the AlexLoop (for SOTA) and the Ciro Mazzino (spelling??) Baby loop. While I like them one huge drawback is the obvious need to retune when changing frequencies which makes contest participation painful. Another big limitation is the inefficiency of a loop at its lowest operating frequency (7MHz in your example) and I suspect that this one is no different. Final comment is the peak angle of radiation in the vertical plane is quite high (~40-60 degrees) making DX more challenging. FWIW I think using at ATU a big “no no” with a loop given the sharp Q of a loop.
Another great video Matt.
I wonder now that you have had this loop antenna for a while any thoughts on how it could be weatherproofed, would it be practical?? My first concern is access to the range switch, though I suppose a relay switch could be fitted.
Thanks for any thoughts/suggestions.
If you turn the loop over facing the ground/sky would it work as an NVIS aerial?
I just purchased one of these today on his eBay page , the reason for purchasing was down to the stable looking design, I have home-brewed a few using old radio capacitors and various coax , aluminium loops but my efforts were always substandard, some day I will invest in a 3d printer . I wonder if you have done any follow up videos with good band conditions, could also be used in conjunction with Xphase QRM Eliminator as your aux input to get rid of bad over the horizon qrm radar/woodpecker/ noise as well as local noise in both horizontal and vertical positioning
Unfortunately I gave this antenna to my friend, on a permanent loan! I have too much gear here to keep around so I needed the space. I believe many people are using these.
I have the same loop bought from 2E0ERO earlier in the year. Initial setup indoors just behind the patio doors gave better results than I was expecting despite it being stood on the floor. As soon as time allows and the weather improves I'll be mounting it on a decent portable mount and getting it a little higher of the ground. General consensus seems to be 1m to 2m so I plan on using a tripod that's easily portable. Did you try it at different heights?
test it by placing the two loops parallel to the ground, that is, horizontal: in theory this will be omnidirectional but it will only pick up the signals that arrive from the horizon (which are the interesting ones) and not those that arrive "below" the horizon, thus it will capture less radio noise generated in the population's homes.
Hi Nick, do you have the website where I can order? With your experience is the antenna water tight? With the Video I can see the tuning capacitor is exposed. Any suggestions? Jojo
I have been trying to contact 2e0ero via the email address or the Facebook page with no results. Do you have any information that would help?
Awesome demo. The antenna looks really well built. The only disadvantage i found is that is only 30W. I wish they had a 100W or 200W variant too
GREAT PRESENTATION
thanks
oes it work in the rain?
No
Whats is the gain of this antenna?
what was the cost of this antenna?
lovely bit of kit that! but that motor controller could be made so much better. 4 buttons (2 slow and 2 fast)
I don't have Facebook, how can I get in touch what this person? I'd like to get more information and potentially order one for myself.
Next time use Quebec. And Roger Roger QSL when in poor conditions as both are much easier to copy than Queen and yes yes yes. 73!
I thought exactly the same. Even on this video I had (as non-native English speaking person) problems to understand the "q" the first times. Because I was expecting a Nato-Alphabet term.
People don’t use the right phonetics anymore.
MAGNETIC LOOP 40M - 10M Built by 2E0ERO 😊
👍😊❤️✅😘😍😉😉 tidak diragukan lagi
Какой диаметр этой антенны ???
Americans love this antenna!
I am really excited to receive this antenna, just ordered yesterday! I live in Alaska and am very interested in the performance of this type of antenna here. 73's de AL9G
Looks like he's made a nice job of making that.
Does it come with the switch
Try mounting this loop antenna horizontally. You might be surprised.
I found it good for CW and digimodes, bad for SSB (low efficiency). Mounting horizontally gives better omni-directionality. Keep away from metal things as it detunes it.
i'm looking at the rs-918, matt, how do they fair???
It’s really good! Love the fact it has a built on battery. I’ll be doing a video on this soon :) Hopefully I’ll get out portable with the loop too.
@@TechMindsOfficial great stuff, i'm well happy so far with the recommended hardware, keep it up👍
Better if you get the original from M0NKA .
How much is this work of art? Thanka.
How do I purchase one of these??? I see no link in your description above... As well as being an amazing ham radio resource - you are an effective salesman as well.... tell us where we can purchase this .... please....
Didn't see it on your Amazon front store - anymore - so not sure if the antenna designer - no longer offers it....
Hi Dave, you need to contact Ade directly: 2e0ero@gmail.com
The performance is very good with that antenna, my only criticism is please use standard phonetics.
73s M0YNW
M0 You Know What 😂
Looks like a very well built loop how much was it ??
This version sells for around £245 at the time of me purchasing it. He does other options too if you’re interested.
Thanks for the quick reply cheers
Wouldn't this Antenna work far better 50 or so feet above ground? You could just build a Antenna Rotator from a Car or Truck Windshield Wiper Motor and a Few Gears and some Electronics components Mate. Also, could you use a hand full of Electronic Solid State Crystals at what ever Hertz you desired to help fine tune your Stations? Just asking. Thanks for the upload.
Interesting idea!
Would this work for CB radio as well? I'd love to get one and try skip without the RF amplifier
2E0ERO makes a CB one but this one tunes at 27MHz I had a go with 4 watts FM last weekend worked a guy 15 miles away we chatted for 20 minuts no issue so it works but not much CB in my area to test it fully
V Good. Let's see a bit more of this antenna please. How about some WSPR data for us to see? Thanks Kevin M0XYM
Thank Kevin! I was going to include some VNA plots in this video but I ran out of time as it started to rain and I didn’t want it to get wet. Eventually I’ll put a bin liner over it lol..
WoooW
What diameter pole did you use there? I can't find anything that will fit the mounting or did you give Adrian your own custom measurements before printing?
Unfortunately I don’t have the antenna anymore as I have it to one of my friends. But I measured the mount that comes with it and ordered a short tube with the correct diameter from Amazon or EBay, can’t quite remember.
@@TechMindsOfficial ok no probs I'm sure I'll come up with something, cheers.
could this be used on a window sill in your shack?
Absolutely, many people use loops indoors. Just do NOT touch it while transmitting as there is lots of high voltages.
Do you know whether he is still making these? I wrote a couple of emails but got no response. So, I don't know whether he is still providing these. Thanks for any info you might give me.
Yep sure is, I would imagine he has a huge back log of emails to work through, I’m sure he will respond as soon as he can. This is a hobby of his, to build them, so it may take a little while but worth the wait. Also, if you look on EBay UK, he has some listed ready built. www.ebay.co.uk/itm/Magnetic-Loop-Antenna-UK-MADE-8-BAND-Camping-antenna-QRP-40-10-metres-BUNDLE-/303988042937?_trksid=p2349624.m46890.l49286
@@TechMindsOfficial Thanks so much for the info. Good to know!
I built a 15 to 40 Magnetic Loop for my self. I use it at 40 watts. KG7IRJ Ohio Extra
Nice intro, but using the international phonetic alphabet may have helped with your ident with the Russian station, especially with Amateurs where English is their second or third language.
Thanks for the video. I sent an email mentioning your video and got zero response. Maybe he does not send to the US?
Thanks!
Hi ya, don’t worry, they will reply. He does this as a hobby and after my video I’m sure they have a lot of emails to get though. He ships world wide, so US is a problem. :)
You can find them on EBay UK too. Let me know if you get a reply within the next week or so.
How much wattage can you put through this thing
This particular model is 30 Watts, but that’s down to the capacity. I’m sure he could build you a higher power version if required.
You can't separate E & H fields. An aerial is an aerial is an aerial. They all work the same way.
Garden? is there a garden with the antennas?
😂😂
Has anyone compared this against a halfwave dipole or a ground mounted vertical?
Dave Casler has several CZcamss of mag loops. His significant experience claims parity with dipoles.
Looks nice - but - I don’t like that unprotected electric power connector. Should be in a waterproof box
#TechMinds
I think more people need to learn what "5x9" actually means. You don't ask someone to repeat themselves that many times and still give them a 5x9.
It’s always a tricky one that because it’s also quite possible that they had qrm, as opposed to receiving a weak signal. But yep, agree, too many 5/9 and I’m guilty of that too especially if I forgot to look at the S meter :)
@@TechMindsOfficial Yes, that's a good point. Thank you for that. :)
Can you still buy these? I’ve sent many messages but never got a response
I'm a bit confused how do u change groups of bands ?
Variable capacitor motor driven to find new frequency through matching frequency to inductance capacitance.
I think if you used proper phonetics giving your callsign and not random words (queen) then the other station knows what words to expect and therefore understand.
As soon as you throw a random word in it can be very confusing.
Just my thoughts.
Queen is used quite a lot as it’s quicker to say than Quebec. But you’re right, I should of started with the correct phonetics. Thanks for watching 🙏
What a ridiculous explanation that “Queen” is quicker to say than “Quebec”, especially since you had to say Queen several times!
@@nivid01 as a commercial pilot, I / we use phonetics all the time and I have never once heard any other pilot abbreviate a phonetic.
A) because we'd get bollocked by ATC and whoever else
B) there is no ambiguity in what letter we're trying to say
C) because it sounds stupid making up words
This is not having a go at anyone but so many amateurs do this and it does my nut in.
Rant over.
:-)
@Steve Jenson Not sure what part of the world and what HF bands you listen to, but queen is used a lot by lots of amateurs.. the reason for the station not hearing me say my callsign, whether it was Quebec or Queen, was down to QSB.
Looks like Queen is listed as a possible phonetic: www.sckans.edu/~sireland/radio/code.html
Perhaps if you used the international standard of "Quebec" rather than "Queen" he might have understood you sooner.
Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliet, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whisky, Xray, Yankee, Zulu.
You’re welcome!
Has the phonetic alphabet changed?
If you use the phonetic alphabet properly, you will find less retransmissions are required. I personally find Queen, Mexico, Kilowatt, Sugar and other non-standard words difficult to pick out of the noise.
So it will need power from my power supply
The Russian asks what is your callsign 3 times finally after repeated attempts gets it ....
Gives a 5/9 report!
QED. Bwahahahaha!
Just FYI, that hardline is pronounced "HEE-lee-axe" (unless it's an established English thing, in which case, ignore me...)
If only there were a STANDARD phonetic alphabet to make it easier for people to understand your calls...
Damm… I didn’t know that..
how stupid the QSO, ask a few times to repeat call and then gave 59 sig report. How stupid. Antenna build looks very good, from 1/2" heliax. But real test would be set beside dipole.
queen? wtf?
Sadly, I think this guy must have stopped trading, his FB Page is 6 months without any activity and he doesn't reply to emails. None of the links work on his website and there are no Ebay listings for his products.
I find the interest in small magnetic loop antennas baffling for anything other than just as a recieving antenna..The radiation resistance is sooo small that it cannot be efficient as a transmitting antenna especiall for QRP....What am I missing>
With my FT-817 and this loop I have worked plenty of DX You are missing the the fact you have not tried one!
They in fact work very well provided they are optimised. The important thing is to balance area inside the loop vs current in the loop conductor while minimising Ohmic losses. Making it circular optimises area inside the loop and a circumference of about one eight wavelength gives plenty of current. Two turns reduces diameter that can be useful for covering lower bands, and/or intensifying magnetic field but reduces capture area. Inter turn capacitance can become an issue. Most designs settle for one turn and confine operation to 40m and above.
Peoples were used to say : Oh flying ? Nah, not possible. Now : it will NOT be the same as a classic and well placed dipole, no. If you wanna better energy transfer then you'll have to make it with a physical coupling and not the small ( 1/5 of the main loop ) loop but the downside is the noise, wich is bit higer than the small loop coupling ( of course the downside is bit less energy transfer but better "noise cancelling" . Gain ? The same, it will NOT gain as same as a well built and placed dipole BUT it's VERY silent and this let you listen the fleeble signar from far, far away... Try one if you can, trust me .
buy buy buy
How much dollars ?
There is a link in description to Facebook group and their email address, please email them with your requirements. Mine cost £245
@@TechMindsOfficial Facebook page unavailable as of 01.May.2021. Message reads: "This Page Isn't Available Right Now. This may be because of a technical error that we're working to get fixed. Try reloading this page." - ...and reloading does nothing. Too bad as I am very interested in this antenna.
Seems to be okay for me. It’s not used much, but it appears to be online, I just made a post on there.
Don't think this is being offered anymore the creator doesn't answer FB messages or Emails.
It is still available but he makes these in his spare time. I think he also has a back log of orders and emails. He will contact you back, eventually.
@@TechMindsOfficial thanks
NO NO NO NO, you don't use an ATU with a magnetic loop. The loop will not radiate properly if not tuned correctly and an ATU will not help.
I add a few NO NO NO NO NO's. that is a big NO NO to use a ATU with a loop, never do that
Actually, you're wrong. You can tune a loop with the capacitor and get the best swr you can. The ATU will then match the impedance.
Please spikes in Russia-- lengwich. То есть по русски, пожалуйста!!!
hahahahaha, he asked you for your call sign 10 times and gives you a 5 9 report ????? what is that all about ????
These are very expensive for what they are and perform worse than a random piece of wire and an LC tuner. We know this because a friend had one and did A B comparisons. The reverse beacon network also helped with the tests. His loops must have the worst efficiency of any loop on the market. The diameter isn't big enough and that normal air spaced capacitor will also be extremely inefficient. Expect between 1 and 3% efficiency. People say loops work, and yes they do, but a wire tuned with a simple LC circuit works much much better, and that's saying something. Don't waste your money people.
Queen ? 🙄 ... whats wrong with Quebec ? 🤔😏
Qsl
Again..... again..... you are 5/9... says it all
Maybe you should not so painstakingly try to avoid mentioning pricetags.
Its a lot of wasted time for people just to find out and research if they can afford an item.
the antenna built by 2E0ERO looks outstanding and sexy. and i would prefer to support a small eruopean workshop (even if it is in uk who dont like rest of eu anymore)
over a big firm from the states. UK > US - any time of the day (sorry yanks, but the us-definition of quality does not align with my stars, nothing personal)
On the other hand.. its probably not in my budged do i even bother confirming that in an email dialog? probably not.
Your channel would instantly become more useful to your viewers if you would not leave out the most important detail missing from all your vids i watched thus far :-)
- subbed anyways, but i thought you needed to hear also the truth between all the well justified 'yesman' posts :-)
73 og4u
It’s not wasted time because prices will vary depending on your requirements. A simple email to the person making them will tell you how much it costs. :) thanks for watching, and yep, it’s an awesome antenna.
@@TechMindsOfficial i did contact him, and i found the prices to be quite reasonable.
The problem is more tolls and shippings after brexit.
hi all,how much do it cost for an 20 or 40 metres version? i never tried those loop antenna before and ,,i cannot weld anymore nor worked on radio so i must try to find a good deal for my Retired Budget.i cannot find his web side where he is selling her
73
Gervais,ve2ckn
I love loops. -fantastic for data modes like FT8!
73 de N2NLQ