UltraLight Magnetic Loop Antenna + XIEGU X5105 

I have found the exact same capacitor as yours (320+380 pF) on eBay for $20 in Bulgaria. I've bought two and I will make the same antenna!

That is awesome Pavol, sure likes 20 meters that is for sure. Even 17 is a nice swr for sure and decent bandwidth when tuned. Cheers Fred

Hi Paul, Many Thanks for another great video about magnetic loops. I've been thinking about one for much higher power output, which will also obviously require a much larger spaced capacitor. However, due to the high Q of the magnetic loop, have you thought about putting a much smaller value variable capacitor in parallel with the main tuning capacitor. Maybe start with the fine tune capacitor at somewhere between 1 quarter mesh & 3 quarters mesh, and then tune the main capacitor in your normal way, followed by finer tuning with the secondary smaller variable capacitor. A field strength meter attached with its pickup antenna close to the mai large loop may simplify tuning & increase tuning accuracy, especially when fine tuning with the smaller capacitor in parallel with the main tuning capacitor. I would be very interested & greatful to see your thoughts on this. Once again Paul, Many Thanks for your brilliant antenna projects videos. 73 De M0RAY, Sittingbourne, Kent. UK.

Very good job. My next antenna build is a magnetic loop in the same frequency range as yours, I'm planning on using a capacitor out of a full power tuner. I have an old Amp Supply AT-1200, I also have a 10-foot 3/4-inch copper tube, since I already have the copper, I will go with it. I's nice to have an analyzer built into the radio, I use my G90 in the same manner. 73's🎙KD9OAM🎧

That variable capacitor has two major sections of different sizes. They are probably for an AM radio. (MW & LW) The left hand section is about 500 pF the right hand is about 350 pF. There are also 2 small, extra segments on the same shaft which are very low.. perhaps 15 pF . They would have been for FM radio tuning. If you seek as high capacity as as possible, parallel them in as well. It won't add a lot but every bit counts.

I made a couple Magnetic Loops. My best works for 15 threw 40 meters.

I am building a very similar antenna, and will watch your progress with interest.

looks great, would love to get a hold of the parts to make one for my X5105. may have to do some saving up for this

Very nice job! Antenna is great and radio is great too! Thank you for this video.

Hello, great video of your Magnetic Loop. I have a question, how long is your thick coaxial cable that you made as a big ring? 73Jörg

Wormant is in Micro Bandas youtube page

Good ideas. Got a little seasick watching the moving camera. I made videos for 30 years. The point of the motion camera is for the subjects to move NOT THE CAMERA. Devise a homebrew tripod for your camera, or buy one. The PVC mount seemed to have changed shape from the start to the end of the video. These are wonderful little antennas, and the ideas in this video are very solid. I look forward to making one.

Most interesting project. Amazing results. And quality video.

This could be OK but would be better with gearbox on it. Tunning is very very fine so without gearbox you will have problems correct tune to the frequency. 😉

Excellent! I might try to build one! Thanks and 73 de K2CJB

Is your antenna a resonant shielded frame? In the center of the loop, the screen should be cut, in the same place, the connection loop is connected in the form of a small circle.

What confuses me is that the loops are made of shielded coax which blocks signals. Why isn't it better to use exposed copper?

Paul, I love the video. I have a Xiegu G1M SDR QRP. I will build a similar antenna (waiting on a variable capacitor from China - similar to yours - 2 ganged 350 pf). I am interested in the actual wiring setup. Did you join the center conductor and the shield at each end of the large Primary loop? Or did you simply use the center conductor inside the shield. I am thinking of joining the braid and center conductor at each end of the Primary loop, where they connect to the capacitor. [Edit: I see you left the shield unterminated and even with a few cm gap on the opposite side] Also, have you simply left the ends of the Driven loop twisted off (it looks like) and unterminated? VK4FETC [Edit: I saw in another of your vids what you did - many Thanks]

Hi Paul, You never mentioned the size of the loops ???

I am disabled and could not build such an antenna. Would you be able to build one for me or recommend a commercial antenna of similar dimensions. Cost is not terribly important. Thank you, Mike, N0WDM

Hey dr op. What RG type cable is the main loop made of? And which scheme did you use for connecting the RG58 small loop at the ring/shielding? Thx es mny 73.

Paul love the Ant Analyser on the XIEGU X5105 . That is really useful. 73 once more, de John - G0WXU

Hello the effectiveness of the loop would greater if you increase diameter of loop closer to 36_39 inches adjust small loop to suit good luck steve gw7lop

My dear friend is the main loop diameter 45cm..is it...thank you for your reply...Ta3le..73...

Hello Paul, very interesting built of a MLA. Have been experimenting myself but have a larger size loop. This one is smaller but seems to be working well. Have 2 questions: Don't you have problems with tuning, I'm not shure your capacitor has reduction? And question 2 is: Could you tell us the length of the coax you used for the large and the small loop. I like the way you routed the coax through the tube, never thought of that. 73, Bas PE4BAS

Hello next great video

Wow Nice!

Would you recommend the MFJ-9232 QRP LOOP TUNER? 73s. Really enjoying your videos.

Hello Paul, can you please give me a detail of how the small loop is connected? It does not look good on the video if you connect the central element with the mesh or how that connection is made. thank you very much HK6PAN

Экран кабеля подключается к конденсатор, а центральный провод куда подключить.

3:39 HOT POLE (or central pole) not connected? Did you connected to condensator only to the cold pole of the coax cable?

Realy nice job

Can you share any detail of how you closed the small loop? Did you just solder the shielding to the center?

how big is this antenna? PY1LHL

I hold the coax in place with zip ties.

Great video and antenna design, mag loops are really cool. how much would you say it cost you to build? Also have you tested general Rx/Tx indoors? 73, KE8GAH

Hello Paul, What is the emetter of 10.10 Mhz, I receive the same noise in France on the same freqency . I don't know from where it is coming . 73, F1HLF Serge

heiio Paul! where can I see the exact scheme of your antenna? I'm interested in connecting a small loop and capacitor. 73! RW9RN

Hi can u tell me the length of the thick coax and the small coax length pls de M0YQQ

Nice job ! 73 deF4DNP.

Hello. From Argentina want ask you, what do you knou about wormant antenna? Thank for your answer

Hello, thank you very much for the video. With a variable capacitor of 30 to 350 pF could you make that same antenna?

well made and nice video thanks for the hints de 2E0LGZ

How close does the driven element have to be to the main loop? Did you play with varying distances between the two?

Hi Pavol .., im planning to build one of this antennas because in the house that i live .., i can't install big antennas :( .. could you share me more details about the size of both loops. This is XE1GSY .. 73.. !!

Fantastic build and explanation OM. 73 de Paul. N0AH

I don't think leaving the copper on the PCB is a good idea. when the antenna works at high power, it will get really really hot.

where did you get the capacitor ?

Have you tried to tune it down to 80 Meters band?

do you sell this antenna?built or kit? 73 de HB9GNK

MFJ should stop importing and supporting Chinese Radios.