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Homemade Magnetic Loop Antenna In Detail
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- Опубліковано 20 лис 2012
- I was asked for a more detailed video from my homemade loop antenna, I hope this one answers the open questions?
The basic idea for this antenna comes from a book called: "Technik, Tips und Tricks rund um den Empfänger" (Techniques, Tips and Tricks around the receiver).
I just changed some minor details like the copper pipe instead of copper cable.
Great! I have a shielded loop antenna, but it does not have the tuning loop. It consists only of a 50ohm rg58 cable inside a hula hoop and a box where it is connected to a variable capacitor. It is small, and covers 60m to 13m. it is a very quiet antenna, the signals aren't that strong, but low QRM and a radio with good RF amp and AGC will do the job. Lately, I bought a ferrite bar loopstick antenna with an inductance signal booster. I connect my radio to this booster and bring the two antennas together. They complement each other and the result is much better than using each of them single handedly. Of course, you have to be patient enough to tune both antennas as you roam the bands.
Nice video and nice work. I have had excellent experiences with my homebrew magnetic loop antenna. I use it for transmitting too.
Thanks for the video.
Wonderful work ! I love it.
Nice work, looks great!
Nice build !
Lovely Work
I own a Tecsun PL660 as well, great receiver.
Nice work :)
Schönes Video und saubere Arbeit beim Antennbau, Hermann! Die Loop-Antenne gefällt mir. Hätte ich nicht schon die ALA1530, würde ich mir wohl auch eine bauen. Einen hochwertigen Drehkondensator, ein Überbleibsel meiner ersten selbstgebauten (besser: wüst zusammengeschusterten) MW-Rahmenantenne aus den 90ern, habe ich noch herumliegen. Vielleicht packt mich irgendwann die Bastellust... 73, Matthias
Great video, thank you for sharing this. Regards, Graham de G4VUX
Thanks for this video. What is the approximate diameter of the coax loop? Thank you in advance.
Good short instructive video. I just remembered a 2-meter loop that I had made years ago. Its sitting on a Shelf. I'm wondering if that could be converted for a short wave listening Loop. 73 John
+nyte_owl shortwave listening Thank you, John! It's a nice antenna for swl'ing at home, it can help to null out some of the local noise. Sounds like a great project to convert your loop and bring it to life again! 73's! Hermann
Very nice video, congratulations ! no matter if my question seems very very very stupid, (I'm just a listener and close to absolute zero in electronics) but you wrote : "here, the inner connector and the shielding are soldered with each other" I guess i've understood but i'm not absolutely sure "how" you did it ... (told you it was a silly question ... ) perhaps a little schema would help ? anyway thanks again :)
Loved it
Why is a variable capacitor of 500pf needed? Would a capacitor of greater value produce better results?
The rapport beetween principal and secondary loop is 1:5 right? In this video I see a secondary loop too big.
I have two section variable capacitor. There are either of two solder lugs on each side
in the bottom, and two upper lugs (the one in the midle and the other in the side).
Please, write me how can I connect them together and withe copper pipe as well.
Sun Collins At 0:28 of the clip you can see the connection of the capacitor quite well, there's a jumper between section one and two.
What is the impact of changing the size of the loop bigger or smaller
I just experianced my first qso using my qrp rig, the qrp bug has bitten me hard.
Now I want to make my own qrp rig, from a kit of course, and make a loop antenna like urs. very nice work. What type of gain doe it have.
Thank you for your interest! This is a receiving antenna to receive the broadcast bands between 2 Mhz and 16 Mhz on shortwave. 73!
oh ok, my missunder standing. well ya did nice work on it.
I am wonderring what type of gain a loop has,? I am in the process of making one now.
Здравствуйте! Если я правилтно вас понял то кабель RG-58 находится внутри обруча? Подойдет ли аллюминевый обруч для такой антенны? Спасибо!
how did you do it?
can you tell me?
Sorry to keep asking you. There is the jumper between section one and two.
In the video I see that the jumper must be connected with the left side of the copper pipe. In my case the upper lug in the midle of my capacitor must be connected with
the right side of the copper pipe? Right?
Sun Collins Yes, I think so. Just try to find the connection that gives you the biggest frequency coverage.
I'm curious how you shaped the copper tubing without causing nasty kinks, did you use a jig or perhaps fill the pipe with sand?
Cheers ;)
***** Since I did not have a suitable sand available I avoided on wheatflour out of the kitchen, which was a good substitute:)... Cheers!
Wheat flour eh? very resourceful...
You can also fill the copper with water and freeze it overnight. Bend your tubing then the ice melts you are good to go. This works good on refrigerator tubing.
the pick up loop is the shield braid soider to shield of to coax and to coax ay wire connect to the cent wire of the coax fees line and is the center cut at the break of th coupling loop?
I like a video How to to do that
Do I need ground this antenna?
Beautiful design, elegant concept. Thank you for your inspiration, I feel it is completely possible for me to homebrew my own even though I have no experience.
One question: where did you get your variable capacitor?
You can get them on ebay, they cost around 15-20 €
@@dejan.b17 Amazon has them as well.
I dont mean to be so off topic but does someone know a tool to log back into an instagram account?
I was stupid forgot my login password. I appreciate any help you can give me.
@Brantley Orlando Instablaster :)
@Randy Evan Thanks so much for your reply. I got to the site through google and Im waiting for the hacking stuff now.
Takes a while so I will reply here later when my account password hopefully is recovered.
Are both sections of the variable capacitor used or just one section? I would like to build one and need to know if a dual section capacitor is required or a single section
You can connect both sections in parallel, adding up the capacitance of both
HI could anyone tell me where can I buy the same variable capacitor or which called it?
Amazon
Very great Magnetic Loop Antenna !!!! Congratulation !!!!
Which is the thickness of the copper pipe?
Sun Collins The outer diameter of the copper pipe is half of an inch.
***** Thank you!
This antenna is better than Long Wire or Dipole antennas? Thanks...
João Damasceno It's a great antenna for listening at home to null out some of the local noise. When I drive to the countryside I prefer longwire antennas. Thank you for the comment!
Is this also for SWL or only for MW?
With this turning capacitor it covers shortwave 4 to 16 Mhz.
Thank you!
0:43 Why did you made an interruption of 1cm ?
Otherwise this kind of coupling loop does not work.
Nice, 73
Is this type of antenna for shortwave or AM (MW)?
I detail?
Were are detail!?
Sounds like the Tibetan language！
UPDATE: OK, the loop is a 2.5m length of copper, formed very nicely. Copper is very strong, and is much easier to fashion and solder / electrically connect to.
I am investigating using a suitable 440pf varactor diode to allow "remote" tuning of the loop, rather than the variable capacitor having to be present at the loop itself.
Joseph Rotello If read carefully the description in the video you will notice that the used copper pipe had a length of 2,50m. I never mentioned that the diameter is 2,50. Thank you for your comment.
Wer liefert mir eine vollständige Bauanleitung für eine mag-loop für 40 bzw. 20m 'Band ? Chumanjo3@gmail.com. Danke und 73
Please don't fry those wild bees with this MLA 🙆♂️
In the age of Internet, this looks insane!
I get all the world radio stations on line, including police and fire!
sure but you never know i ternet down or something. and not all stations do online
it's an hobby... please shut up
not a great instructional video