CB & HAM RADIO: Build a MAG-LOOP MKIII Works on 27Mhz CB & HAM Bands
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- เผยแพร่เมื่อ 18 ธ.ค. 2020
- A New Mag-Loop build that works on the CB Bands without the need to use a capacitor!
Thats not to say that's where you leave the build, eventually you will need to add a capacitor of some description, be it an air spaced, vacuumed or even a trombone capacitor add one you will if you plan to use it on the Ham Bands.
A big shout out to Frank: Thanks Frank.. :)
www.nonstopsystems.com/radio/...
For my STL Loop:
7 X 62.5 cm Copper pipe 22mm Dia
2 X 30 cm Copper pipe 22mm Dia
8 X 45 Degree bends 22mm ID
1 X 15 cm Plastic Pipe 22mm ID
1 X 100 cm Coax for Coupling Loop
I do hope you enjoy it and subscribe for more..
Many thanks
Mike - M0MSN
To get notified of the next upload .click that bell and subscribe.. - บันเทิง
It's a known fact for us Amateur Radio Operators that the use of zip ties on any antenna projects gives us at least 3dB in extra gain. I enjoyed that one! :-)
3dB must buy a bigger pack.. lol
I have used zip ties to hold my Magnetic Loop antenna together.
@@paulshaffer9674 Transported a Mosley Super-33 using only Zip ties to hold it to the trailer.
A superb production as usual. Thank you 👍 M0DSK
Many thanks!
Another top video. Great work Mike 👌
Thanks 👍
I love your videos! Thank you for sharing!
Great video Mike, as always.
73
Thank you great stuff
Looking forward to the 40 m loop :) great work 👍
Thanks! 👍
+AAA for the ambient music. Great projects and Ideas
Thank you!
Great results with no capacitor, that's a little bit impressive! I going to catch up and watch the next episode, should be good! Thanks for the video.
Thanks Mike for another educational video for us Hams who love to build antennas keep them coming.
Like your work nice antenna hillbilly in the bam waving the hand
Excellent job thank you
Great video Mike
Man size tip on that soldering iron too 😲😂
👍👏👏
😅
Love the relaxing music.
Very Good and Simple. 73 from Germany✌👍
Many thanks!
great video will build one myself, for 11 meters.
Hi, interesting video,well explained, i dont have one needed now, but you never know in the future, thanks from Rotterdam.
Thanks for watching!
Great Work mate 2AT102
Many thanks!
fine plumbing skills , good to see plenty of heat applied , lesser mortals err on the cool side and fluff it up . lead free solder and powerflow flux require lots of heat ,,,, I shall now run out to my van and get the required pipe and fittings ,, old mrs jones down the road can freeze another night , her heating system can wait ! fantastic video , i love that loop its a work of art ,,,, 73s
Thanks 👍
Very interesting. 👍
73's
514 Ontario Canada
Thanks for watching!
I built a huge six-foot diameter Magloop and spent months designing and building the six-tube trombone capacitor! I used a hydraulic cylinder made from two pool squirters to tune the cap and remotely controlled it with a peristaltic pump. It looks very much like yours. I used a 1/5th ratio diameter piece of extension cord for the radiating loop and fed it directly with RG-213 coax. If all the math is right, it should tune from 80-10 meters!
Got to love them Trombones
Hi Mike, i saw this when you first posted this video, Is been 3 days since and my mouth is watering to see how things have developed :)
looking forward to 40/80m
Not long to wait now. lol
Hahahaa.... Great, Mike - this time, u added the music title direct on the vid! As usual, great job, well done!
Thanks again!
Great build! I cannot wait to see any updates. I made a blueprint for a aluminum dryer duct loop with a vacuum sealed cap. Good for 9,000 watts 😂👍🏼
Hey why is everyone cappin on some light music. It was fine.
Thanks 👍
Good luck trying to find 7/8" copper tubing in the U.S. 3/4 and 1 inch are radially available.
Oh wow!
I never thought of a magnetic loop for the CB band. VERY interesting. I may have to break out my CB gear and start experimenting with it also. Thanks!! 73!! de KE5ES
I made one a while ago, 80cm diameter, from copper pipe. www.zendamateur.com/viewtopic.php?t=23015 for picture and discussion (dutch). It is extremely narrow-banded and I have to tune it to a specific CB channel.
nice
@@PaulaBean Leuk loop antennetje :-) dezer ook ééntje in elkaar zetten
Nice one Mike de G6JMX
Cheers
Sorry, I helped "Uncle Reggie" build one of these
but he soldered the center of the coax from the transmitter
to the *_center conductor_* of the Faraday loop
and had excellent performance.
- I was surprised when I saw you solder *_BOTH_* the center conductor and shield to each end of the *_shield_* of the Faraday loop.
Nice work Mike. I quite enjoy your videos. Down here in the land of Oz, we call Cooper pipes ‘Copper pipes’, but that’s just us being contrary. :)
That is awesome! lol
Inspires me to make a loop of smaller diameter tubing, but to fit the 3/8 24 thread of my CHA MIL matcher, so that maybe I can work a loop from 160 ~ 6 meters that I can turn vertical and horizontal. Nice video, kd8efq/73!
Go for it!
this one is interesting as it goes on 20 and 40 meters. ( later on ) to bad those vacuum tube capactors are so expensive. 73s mate and a merry Christmas from PD0ROH
Yep very expensive... Thanks 👍
That will have a nice high Q factor on the lower bands and have a relatively good efficiency that size but not so on 10m like a true mag loop. High Q loop for 10m with 22mm pipe will be about 60cm diameter.
Yes As you say a Magloop is normally 10% of the wavelength in dia.....
Ah Mike, it looks like you are multi tasking; making stew at the same time. Lol
Tune your antenna with the brass valves :)
Nice work gang! 73 de N4BKT es KI4RHM
Thanks
"The antenna is resident" must be 27 CB Way! Like the bloomers at the end, very funny. :-D
😁
I've not really looked into a DIY mag loop. If you wanted to keep the kit more portable can you leave the joints un-soldered so you can break it down or would that negatively impact the performance? Thanks for the build! LCARA Ham Radio
Well the Mag loop works on skin effect so the joints need to be soldered so it appears to the RF as one piece, for portable use I would go for a Coax Loop, as this can be wrapped.. :)
Perhaps a silly question but as the copper ages an turns green will that effect the SWR to any extent?
Not a silly questions, the answer is yes, the loop works on skin effect and so the cleaner the better, but you probably will not notice.
What is the polarity? Maybe both or even circular? Build a second and them with co-phase them or a 2 element yagi. Something to think about.
Vertical in this position
Cheap trick, 4x4 ceramic tiles under corners when soldering, no melting the floor paint.
12x12 and 24x24 on the desktop.
Great tip.👍🏻
Nice build Mick . Could this be built circular ? If you had the way of rolling the copper tube ? It would save all that soldering !! .
If so , what would be the optimum diameter for 27.555 MHz ? Is 22mm dim copper Ok ? Or would it be better to use a larger diameter tube ?
Hope you have a merry Christmas
Yes, absolutely if you can roll the tube go for it... not sure on the best diameter check out www.66pacific.com/calculators/small-transmitting-loop-antenna-calculator.aspx
Great stuff as usual mike....do we need the music.....
Probably not.. 😁
@@mike-M0MSN Gi8kzu..
You know sir the loop length is half wave dipole with out condenser at 27 Mhz so dipole resonance is equal to LC resonance
Wow love your build and I wish you’d make one for me I’ve never been into DIY and don’t have space even I could do DIY to build it
It would be ideal for my balcony on the 34th floor working the 11m band so on 27mhz it’s ideal. I hope you would consider building them for us.
Did you manage to do any dx on it yet on 27mhz.
Hope to hear from you
Cheers Kevin
Hi Kevin, sorry it is my goal to inspire others too DIY, not to build for sale. many thanks.
What book are you using as a resource? I like the antennas.
www.nonstopsystems.com/radio/frank_radio_antenna_magloop.htm#top-of-page
Hi made one loop last week. Does not show any output in the VNA. In your video you have connected the shield on the loop with coax able which goes to the radio. In some of the literature they have left the shield as is and the live of the coax loops and gets connected to the shield.
www.nonstopsystems.com/radio/frank_radio_antenna_magloop.htm
Mike - you must have a very understanding wife! - she wouldn't have a sister would she? haha.. looking forward to part two thanks.
Ha Ha
Hello Mike, I hope everything turned out well with the Magnetic Loop Antenna. Have you used it yet? If so, do you plan on making a video so we can see
its performance. Thank you WR0546 in Minnesota.
Yes, soon
Mike is it possible to build a twin loop for 11 meters
Looks interesting, might be a lockdown project for me. I have a question, in some of your videos I've seen you use a Surecom SW-102, and I've stupidly, accidentally bought one, which I thought was an HF power/SWR meter, when it's actually a VHF/UHF meter. Have you tried using the VHF/UHF meter on HF? Does it work? Thanks
Yep I have one great bit of kit but VHF & UHF only.. :)
@@mike-M0MSN Ok thanks, luckily I’ve found a buyer for mine, shame it doesn’t do HF like I wanted because it looks to be a pretty awesome meter.
Channel 40 in the USA is 27.405. Center of the band channel 20 is 27.205 and channel 1 is 27.96.
Must be a little different where you are.
Mike did you ever add the capacitor to this one?
I just watched the dual capacitor 40 & 80 Meter loop but didn't know, perhaps that was a separate build from this one?
Dang, who has a radio that can tx on cb and ham to even needs a beast like that, when cb is scrap, separated, phone line or ethernet wire dipole length friendly? I really wish the FCC would open up the power and freq spread of cb, so it is not a threat to a hypothetical over power, out of band shack. That is also why people buy a cb, hear nothing, not even truckers, and show back up with a reciept, and swap it for gas.
🤣
E.T. Phone home !
Can coax RG213 for the outer loop
yes
27.5 not a lot of us, HOWEVER, if it's diameter was reduced by a few % could it not be made Nativity Resonant on the Ten Metre Band 😉
Merci Mike 73 de Gérard de Paris F5MOX. Look mes 2 loops magnetic.
building it tomorrow could we join together make it like a quad? if i can would you please tell how
dave
Vielleicht bringst, wieder einmal ein neues Video, eine kleinere Loop Antenne, für 26,27,28, mhz, für Balkon, bzw Innenraum, 55, 73 ,Lg
👍
Peki bu çenberi alüminyum dan yapsak olur mu
Evet alüminyum çok iyi çalışır
Fakat ölçüleri fakli olur
Hey, i don't think that is a magnetic loop. You got way above a quarter wave sizewise and so made it cross the selfresonant point and so got rid of the advantages of the "magnetic" part. I am not super sure, nor do i want offend, but what you build here is not a Mag Loop for 11m band. It's more a quarter to a halve wave antenna. What you basically did is get the Z way lower than Xc , that is not how magnetic loops work. Maybe i am wrong. Enlight me please :)
NO you are probably right, it not really for the CB band its for 20 and 40M, 27MHz is just a by product.. :)
@@mike-M0MSN Just out of curiosity, are you still using that mag loop you build with that trombone capacitor? And if so how is it working?
@@pulponair yes it is in the next part as a comparison 🙂
It is NOT a good idea to perform soldering with tin. You should use copper and silver bars to solder all tubes to avoid RF loss.
Where's the capacitor ?
Next video :)
Never mind the loop just add a bit more to the fry up and go into competition with Gordon Ramsey ! Stop Press - price of copper pipe goes up due to unusually high demand :-) .
that were you right to some part but the cost of copper is high due that companys who make it is not getting raw goodsin
remove the music what you do is enough enjoy the tech stuff the best.
Thanks James👍
Vi un sin fin de cuestiones aqui, una de ellas es la soldadura con estaño mmmmmmmm existe la plata que se usa parar en refrigeración refrigeración cuestion 2 si se forma un circulo sin cortar el caño la resistencia del halo tiene menor resistencia, cuestion 3 cual es el propósito de divulgar un proyecto al cual no se le ponen las medidas y en que se sustenta científicamente tal cuestion, se que pueden existir dificultades idiomáticas insalvables, hay avidez en el mundo por el conocimiento, y no me estoy refiriendo a aquellas cuestiones relativas a garabatos griegos que solo entienden los que saben, quedándonos el resto fuera, por que en ese caso solo le explica al que ya sabe jajajaja y no a quienes no sabemos, aun asi mis criticas son solo por que el video parece mas una burla que un proyecto compartido. mi idioma es el que se y el traductor hara su trabajo, no hablo el idioma del poder, hablo el que aprendí y tal vez no les resulte simpático, vivir miserablemente a causa de el saqueo al que nos someten tampoco 73.
Tienes razón, sería mejor si la tubería fuera de una sola pieza, sin embargo, no tenía forma de doblar la tubería, así que la corté. Estoy haciendo este bucle para la banda de 40 metros y funciona bien, pero sin un condensador también funciona en 27. gracias por tu publicación. 73
Your talking total rubbish. You clearly have never used one. The thumbnail used in this video is even incorrect. The Sigma 4 works great planted on the floor. The Sigma 4 will outperform any 5/8 wave. You stick to Antron 99 😂 or better still why not get a S4 and run it side by side there's your next video.