Loop On The Ground Receiving Antenna - Cuts Out The RFI?

Today I am installing a LOG antenna from LMK Technical Solutions: www.lmkts.com/... I purchased this assembled kit after recommendations from ‪@amateursandairwaves‬ Are LOGs as good as they make them all say? Lets find out!
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[@johnk8091]

That was ZS6CCY in South Africa, not ZL

[@phillipzminda6571]

ZS6CCY, Bill, is on 40 every evening. He works a lot of North American stations. Great signal here on the East coast and tries work everybody. You had really good copy, especially being on the West coast. His antenna does all the heavy lifting, quite an array.

[@ny4i]

One thought on cutting off the connector from a roll of coax. Unless I need every foot of cable, I always cut a minimum 3 foot piece of cable off if I need to cut off a prepared connector. That way I can get a decent length for a patch cord just by putting a connector on the other end. You can never have enough patch cables. :)

[@HamRadioCrashCourse]

Good idea.

[@LesbianVampireLover]

Yeah, I was cringing when I watched him snip off the connector. Great idea to cut off a minimum useful piece if necessary.

[@SeedyKidd]

You smart

[@N9XY]

I would just drill a bigger hole in the wall. 😊

[@timel64]

Careful Josh, you are targeted with a dozen green & red lasers. Put the water jet down.

[@royurick]

A couple comments on the trenching. (BTDT) For an easier go: Dig a trench slightly longer than the trenching pipe on the approach side . Use a chalk line or straight edge from the exit point across the walk and mark your line to dig the trench in line with the far side target. That guarantees you hit your target and makes it easier to jet because you are already on target and you dont have to bend the pvc to keep it from submarining. Cut the PVC 24" longer than the crossing is wide. That leaves 12" on either side when you are done. That way you can just cut the tube off on either side of the walk to remove the ends and it becomes a conduit, protecting the wire from the gravel under the walk. Just shove the wire through the PVC instead of removing the PVC and using it like a pull cord. Also the PVC may bind up during digging. Thats because the tube is wider than the jet. Dont panic. Just keep moving the tube forward and back as best you can and it will eventually release itself and let you continue. Have fun!

[@00_Buck]

Great video, I built a LOG a few months ago and have very similar results. sometimes I can pull out weak signals a little better on the dipole but the listening experience is much more pleasant on the LOG.

[@JasonFurtney]

+1 for the black cat

[@kryptonic7435]

Awesome to see you bring more attention to these! I have the same one you tested in this video, and it works incredible with dealing with some RFI from neighbors who refused to help me negate it. Its amazing what 60 feet of wire on the ground can accomplish.

[@davidc5027]

I built and tested a few LOG receive antennas whilst my Yaesu was in the shop, and was using the 7610. The main problem I had was, yes it dropped the noise floor down, but it dropped the signals down almost as far. It was my experience the ratio between the signal and noise improved around 3db on the lower bands using the log antenna. For me, and your mileage may vary, it just didn't make enough difference in performance, to keep the antenna. My FTDX10 doesn't have but one antenna port, so when I got it back from the shop, I just did away with the log antenna. It was a great experiment and glad I took the time to do it.

[@Dusty_Ham]

This is really cool. I've been reading about logs, but to see one in use is really helpful! Once we've moved from where we are currently and actually have a yard, using this with an sdr looks like a winner!

[@mindfulmunchkin1215]

Hey Josh, You go to all that trouble to lower your noise floor but you have noise probably coming from all the LED's you have running everywhere in your house and garden Christmas lights. Use your tiny SA to sweep your lights psu's etc. Cheap LED's are noisy and give out lots of RF.👍

[@KeenanBaird]

Just my thought as a landscaper, I would have installed the transformer in an irrigation valve box or one of the unique lighting “SHUB” boxes that way it would be easily accessible & easy to find.

[@M0LMK]

Thanks for the mention @HamRadioCrashCourse. Im glad you like the LOG and it seems to be working well. Because it's much quieter than a traditional antenna you may find using the radio preamp helps uplift the SNR a little. - Matt (M0LMK/KI5GXV) LMKTS Owner.

[@amateursandairwaves]

I love your antennas/baluns too… have ordered a couple of them. Awesome product!

[@M0LMK]

@@amateursandairwavesThanks! That is great to hear and very much appreciated. Keep your eyes on the website as I have some new products for 2024 coming up...

[@benhawke7231]

For starters.. never ever drill through the mortar of your masonry. It weakens it considerably and will cause it to erode a thousand times quicker After drilling through it. Always try to drill directly dead center of a brick if you have to drill through masonry. 😶😑

[@K5YAC-DX]

ZS6CCY, Bill in SA. He's always loud. And the LOOP wins again! Gotta love the reduced QRN. Good project Josh.

[@mattgayda2840]

Remember you need to fill that void under the concrete with something when you're done or that sidewalk will crack and cave in. It's always better to put in an oversized conduit for multiple uses (one inch) then pump grout into the void. Never leave that void open because it will fill with water and frost heave your sidewalk in a year or two.

[@BenjaminHeyser]

While a valid point in most of the US, not an issue for Josh. Nothing's freezing in Cerritos.

[@mattgayda2840]

@@BenjaminHeyser he might not be in danger of freezing but undermining the soil under concrete is still a very valid concern everywhere so I should have been more general I guess. Houses and skyscrapers have been demolished by this, water is an amazing force and erosion happens incredibly fast.

[@AndyAAzeroAM]

Built a few of these. I absolutely love the things. Simply put, they just work for me. Experiment with wire length at your QTH to really dial it in for what you wanna hear

[@NathanMazanec]

Currently watching, my favorite moment 4:05. Cat mittens appear at top of screen! Back to ham radio ... All done, great job, definitely a good consideration!

[@chilskater]

i tot it was black panther

[@MountainMan7.62x39]

If I wanted to watch someone do a project and screw it up repeatedly, I'd just look in the mirror! 🙂

[@georgemeese8496]

Another easy fix for weak signals is to use WebSDR as your receive antenna. Especially useful chasing grey line dx.

[@ogebogi]

It's not a true home project without an extra trip to Home Depot.

[@AntonioClaudioMichael]

Hope you had a Merry Christmas And a Happy New Years From My Family To yours Josh @Ham Radio Crash Course

[@HamRadioCrashCourse]

Merry Christmas and happy new year to you as well!

[@billsuess2200]

Did your wife say that you could do that. Ha Ha

[@BuckeyeBDH]

Hey Josh. Since you already have Milwaukee, get one of the cordless soldering irons.

[@HamRadioCrashCourse]

I’ve been thinking about that. What’s the max temp? No replaceable tip worries me.

[@l.a.2646]

they really work! also a non resonant ( to any bands you operate on) wire - slung low to the ground from a 4:1 UNUN also works well. one thing that makes any of these possible is I have a receive port on my rig, before I had that capability , I had to use a TX/RX switch box or remember to flip the VFO. I have a lot of QRN in the evenings on the low bands. a dedicated receive antenna is the bees knees ! - I love how the cat came over and checked everything out. - I imagine he said "meh.... carry on lad - nothing of interest for me here ! " Ha Ha ! fantastic topic, thanks!

[@lyfandeth]

I may have exactly the same butane iron. After four months on the shelf, it had leaked out a full charge. The maker nicely sent me a whole new set of o-rings, but those leak just as badly. Moral: never fill it up, assume it will be empty. Disappointing!

[@lyfandeth]

I had to penetrate an 8" concrete wall a few years ago. Having the hammer drill and bit made the wall chew out like butter. Worth the price of renting of buying the hammer drill even for one hole in masonry.

[@HamRadioCrashCourse]

Heck yeah! Been there! And when pounding in ground rods, go demo hammer every time. 👍

[@jeffallen3382]

What a discombobulated video! Maybe you should have rethought how this was done...

[@HamRadioCrashCourse]

It was shot in linear order and edited that way 🤷🏼‍♀️

[@mattstosh6960]

In Interior Alaska and I have a BOG (580 feet) but the receive antenna I'm most impressed with is my DIY ARRL 80m Skyloop. Set up at about 10 feet high (Just above the Moose antlers). Its simply one of he best. I will likely purchase of of the Loop-On-The-Ground to try.

[@ChrisN8PEM]

I went down the LOG antenna rabbit hole about a year ago. After 3 months of use, it didn't provide any benefit for me, so I moved on. Still would tell anyone interested to give it a go. YMMV.

[@BeastlyKings]

I had the same experience. Mine is still installed, I just never use it 🤷‍♂️

[@davidsradioroom9678]

This is interesting. I may look into it further.

[@wildweasel6898]

Cats are never impressed with our ham projects. 😢

[@noelbulls8628]

It’s amazing but you need to mess with the RF gain to get good results.right away I notice the noise was too loud which is an indication that your RF gain is all the way open. Try reducing your RF gain and adding some noise filters and you will get amazing results with it.

[@HamRadioCrashCourse]

I did it’s part of the clips.

[@noelbulls8628]

@@HamRadioCrashCourse it’s hard to tell on video because of the volume amplification.

[@rossw9764]

If nothing else, you justified my buying multiple tools that do the same thing.

[@mikeraymond6822]

thers a lot of noise from the xmas lights

[@DD5LP]

I built and installed a LOG about two years ago. It was quiet but my 40m skyloop was just as quiet (I live in a semi rural area). So that LOG has been adapted into my loop ground plane shack earth system and using that in combination with the skyloop, the noise level is now almost non-existent! 73 Ed DD5LP.

[@clamdiggerme]

Can you explain the loop ground plane.

[@hpbear101]

I've used a LOG antenna for several years now. I use it with my RSP DUO, it works well from 40 meters and below, I also use it in diversity mode along with a OCFD.

[@daveborchard2019]

That’s amazing what an antenna on the ground can receive. I used to use a 20 meter resonant dipole only 3 feet above the ground, and it did work. You might try out a different stealth antenna project. Get some cheap after Christmas lights. Clip the leads from each bulb to minimize them from lighting up from the RF. Glue the bulbs in their sockets. Then use the Christmas light wire as an end fed antenna. It will look like Christmas lights that didn’t get taken down, and never light up. People will just assume that it’s Christmas lights, not an antenna!

[@funnycats4962]

An antenna disguised as x-mas lights, LOL! Great idea!!

[@robertvantichelt6448]

A dipole on the ground works also. And you can transmit on it also.

[@AntonioClaudioMichael]

Very Nice Work 👌 @Ham Radio Crash Course

[@HamRadioCrashCourse]

Thank you!

[@AntonioClaudioMichael]

@@HamRadioCrashCourse your very welcome Merry Christmas and Happy New Years from my family to yours Josh

[@TD-ni9vk]

Always great content Josh! Love your ploy of using the Christmas season to crawl around and add an antenna. Maybe I can get away with a mast in my yard if I string lights on it and make it look like a giant Christmas tree. 😀

[@GunsandRadios]

Crimp BNC is the way to go

[@rjy8960]

I'm not using a LOG but a small RX loop - Mine is a Wellbrook that I've had for many years. I bought it primarily because the noise floor on 60m at my QTH has steadily increased over the years to a point now where it is about S5. It lives at the bottom of my garden on a lightweight rotator. I use a resonant dipole for TX and the Wellbrook on a dedicated RX port of the radio. The RX signal strength is typically a few S-points down on the dipole but the difference in SNR is night and day. I've just uploaded an A-B demo on my YT channel as an FYI. Small RX loops aren't hugely expensive - the MLA30+ is about $50 and that design has had a lot of very favourable reviews; I guess the main requirement is that your transceiver has a dedicated RX antenna port.

[@GoAmateurRadio]

If my transceiver doesn’t have a dedicated receiver antenna port which auto switch do you recommend?

[@newsles2]

I use 18-gauge speaker wire and an LDG 4:1 balun to make a square 'loop' around the perimeter of the back garden that's approx. 55ft x 32ft. Works pretty well with many HF bands. 10M is just noise for me though. If ever there's an antenna that works well as a DIY and is also easy to remove if required, it's a LoG imho. Rx only of course. Assuming it's electrically sound of course. Been enjoying your vids btw. Haven't actually said that yet. On the subject of a LoG though, what would be the effect of elevating it several feet off the ground, in my case weaving it through the chain-link fence we have on three sides? Is tx possible with such an arrangement?

[@hamscanner]

I thought it was well done hearing ZL Station but if you listen closely is it a ZS station (South Africa ) anyway once again Josh nice video very entertaining and useful information

[@HamRadioCrashCourse]

Even better! Much further from here.

[@seasparrow7427]

What Icom are you using? I'm trying to trade my best metal detector to get one.. Hopefully the 7300?

[@M0LMK]

Josh is using an Icom 7610. A great radio and perfect for use with a dedicated RX antenna.

[@MaryBrownForFreedom]

7300 doesn't have a receive antenna port, would have to add a external switch for that(DX Engineering makes one)

[@amateursandairwaves]

He’s using a 7610

[@pspadotto]

Gotta ask, what's the cat's name?

[@HamRadioCrashCourse]

George

[@KH6WI]

Been running a LOG RX antenna for a few months. I have a DXE BOG and an LDG 4:1. Even though the LDG isn't designed for it, it works well. Dropped my S7 noise down to S2. I tried to convince Mike to try it but he was pretty resistant to try it.

[@HamRadioCrashCourse]

Oh yeah, Mike should try this!

[@sleeve8651]

Since they claim those COMPACTenna's work so well, maybe you could bury one, and see if works ? I understand they offer one for 40/20 meters now ? 👍🤓

[@KB1UIF]

I have known operators continue to use an antenna even when it's dropped to the ground due to a broken rope. Certainly not a good situation, but the noise floor was lower also, even if their antenna was then very poorly matched for transmitting.

[@KU8RLY]

I tried a log, and it was so quiet, i had a hard time hearing signals. I made my transformer, and ran 60' in a square configuration. Do they work, absolutely! Having the space to put one is surely necessary.

[@sleeve8651]

Seems the old, " Snake " antenna's were much more quiet. You should look into them, and do a comparison ! Try it, you'll like it ! 👍😉

[@rodneytombleson3686]

I wonder if this would work if put through my MFJ 1026 Noise canceling device. Hmmmm?

[@mikezagorsky]

I played around with a 1000' Log. Picked up an FT8 station on 160 meters about 8000 miles away.

[@travisdrake2940]

If I build this loop, would a Vertical antenna in the center affect it? Like a circle inside of square? The antenna being the circle the loop receive is the square.

[@GreggK6EGG]

I did a wall wart search today unplugged the ones i wasn't using and choked the ones i had to use, got rid of a ton of RFI

[@HamRadioCrashCourse]

Nicely done!

[@IrregularInterest]

Very interesting, I've been thinking of replacing my MLA-30+ RX antenna with something else and this is really interesting (and cheap!). Does the wire need to be in a perfect "loop" shape, or can it be bent and conformed around some?

[@HamRadioCrashCourse]

You can bend it around.

[@M0LMK]

The LOG works best as a square with equal sides but in reality, any shape will work.

[@GoonyMclinux]

I have 90' LOG and it doesn't care much what shape I have it in, figure 8 was interesting.

[@ThomasBrady-dp7zo]

Signal amplitude is a function of the area that the loop presents. The largest area that a wire can present is in the shape of a circle. The least area would be if your wire folded back on itself creating zero presented area. @@GoonyMclinux

[@groundzero.]

lol get rid of the ring sign and the ring doorbell.. Don't broadcast to the world you are running junk equipment to protect your property.

[@graywolf1911]

I have not tried this antenna, but I am concerned about my lawn mower creating a mess. So that begs the question, can this antenna be buried slightly under the surface and if so, has anyone tried doing this and what were the results?

[@pablod6872]

At any point during this project, did your wife come outside, shake her head, and go back in the house muttering? Or has she transcended that stage, given all your activities?

[@HamRadioCrashCourse]

The head still shakes autonomously. It she’s over it now. Lol

[@BoboAthanassion]

Good video. Are you still using that chameleon receiving loop and how is it performing.

[@W5CSM-Dave]

Am I the only one who thought the red and green lights were lightning bugs (fire flies)?

[@izzzzzz6]

I like the hose under the paving slab trick and I like the late night working style.

[@nickolasthefrog]

Are there any considerations needed for yards with in-ground invisible dog fences?

[@herrprepper2070]

Have you found that wearing argyle socks improves overall DX?

[@barrymayson2492]

I always dril holes for coax at a slight angle dipping to the outside to stop water creeping along a straight piece of coax.

[@3v068]

excuse me, who is that beautiful creature at around 4:20 (nice)

[@KB1UIF]

The switch unit you showed at the end of the video is great for this LOG setup, but don't confuse it with the MFJ 1708B-SDR that allows for an SDR and a transceiver sharing one antenna. They look almost identical.

[@courierdog1941]

I like your horizontal boring technique. Ha Ha

[@KB1UIF]

If you use one of these LOG antennas occasionally, does it become a LOG PERIODIC ? 😂

[@HamRadioCrashCourse]

lol

[@oldms]

Hey what's up with Notarubicon's video's lately? Seems like he's determined to start some made up war between hams and gmrs users and now the fcc in general. You had him as a guest a long time ago. Do you still follow him?

[@LeeMcc_KI5YPR]

I do not watch his channel much, but he is usually after sad hams.

[@oldms]

​@@LeeMcc_KI5YPRMaybe check out his latest ones then. Not so sure that's the case anymore.

[@MaryBrownForFreedom]

No amplifier? Every system I saw used an amplifier to bring signals up better... Been thinking of one with a 400' loop...

[@HamRadioCrashCourse]

You can use an online pre amp. Sometime the radios pre amp. More testing needed.

[@HamRadio200]

I made one a few years ago. It wasn’t all that great.

[@HamRadioCrashCourse]

How much wire and what transformer did you use.

[@HamRadio200]

@@HamRadioCrashCourse I built mine from plans in QST. If i remember correctly, I used about 40ft. I tried it with a 4:1 and a 9:1. Don't quote me on that though. I was using a 7610 at the time.

[@HamRadioCrashCourse]

I was told not to go below 60’ for use on 40 and 80 specifically.

[@HamRadio200]

@@HamRadioCrashCourse I am going to try making another one soon.

[@M0LMK]

Make sure you wind a 9:1 isolated transformer on a binocular core. I know a guy that will sell you an easy to build kit... 😊

[@adriancressy8363]

background noise was the same on both antennas. The audio should have been dramatic. The lower display shows less noise but your radio gave the same noise as the Stepp IR antenna. Listen carefully

[@HamRadioCrashCourse]

Much less background noise for similar or better SNR. that’s my takeaway.

[@KG5IF]

How do like step ir ant? Been looking at a regular triband yagi.

[@phillipbotero7505]

Plumbing and Ham Radio, what could go wrong?🤣

[@michaelpolimer2128]

that was Buffalo Bill in S Africa......recognize that voice anywhere.... everyone's friend and superb operator......if you can't hear him on 40 every night you can't hear anyone........73 Mike, K1FNX near Boston

[@andrew20d]

What I really want to know: Is Cali traffic that bad? Cause you started in the morning, it seems, and after running to the big box store you get back after dark.

[@HamRadioCrashCourse]

Nah. Not in my town. I have a family and others things I have to get done.

[@DonDegidio]

Hi Josh, Did you get the 60 ft wire for the LOG? WJ3U

[@HamRadioCrashCourse]

I did, yes.

[@Chriswoodworker]

Does this loop on the ground antenna have to be a perfect square? The area I have free is 12ft x 18ft. Thats 60ft total. Will that be ok do you think?

[@HamRadioCrashCourse]

It does not have to be a perfect loop, a rectangle is fine.

[@tzm1843]

What's the best length? I just built a 9:1 balun and 18.5 meters of wire. Should I make it longer?

[@HamRadioCrashCourse]

Long is still always better for lower bands.

[@M7XOM]

I bought the same LoG from LMKS. I only Rx as I’ve not done the foundation licence yet but I’m having great fun experimenting with antennas and various software for the SDRPlay (SDRAngel using the FT8 plugin and map is brilliant!). I got best results laying out a perfect 25 foot square feeding off a corner, significantly better than the heavily modified MLA-30+ loop on 80, 40 and 20m bands (the loop is better at higher frequencies up to 50MHz). I really enjoy your videos and have learnt a lot, thank you. Regards from the UK, Kevin.

[@GoAmateurRadio]

I finished watching your video today very helpful. Thank you. 73.

[@3v068]

This is the first video where even if the angle isnt the best, its shown me how to properly solder and wire up coax with a BNC or any other connector.

[@bo45]

I couldn't help but notice your saguaro cactus, with the Santa hat, in your yard. Do y'all live in the Sonoran desert. We (my wife and I) live outside of Three Points, AZ. In getting back to your great presentations. I've learned a lot, watching your videos. Your a natural instructor. Keep up the good work.

[@phillipzminda6571]

I setup a home-brew 60 ft. LOG last winter. It worked pretty well but didn't want it in the yard during mowing season. So far haven't got around to installing it yet this season. It worked pretty well but should have put it further from the house. I had more noise than I expected. Signals were lower than my vertical but good copy using the receiver preamp. Phil N3ZP

[@sleeve8651]

Watching all those colored dots made me wonder if someone slipped me a hit of Acid ? 😵‍💫 BTW.....it all sounded very noisy !

[@HamRadioCrashCourse]

Welcome to the suburbs

[@TheCraigW76]

Yep, I've been using a KD9SV BOG BALUN from DXE for my LOG. Only about 30ft of wire. Works great on 40 and 80. I've even accidentally loaded it up and used it on RTTY at 100W a time or two! 😲

[@ths3900]

good example for a multiple antenna radio.

[@ths3900]

The Christmas lights give it a tech look.

[@michaelhales-mu4kk]

Fun being a kid again, playing in the mud and water.

[@KC3PLG.Kurtis]

I'm looking for an online test to upgrade to general.

[@KeepEvery1Guessing]

It's nice to have a choice of several antennas, especially on receive. (The guy on the other end isn't going to be bothered by you local noise sources.) If it had been me, I would have put the professionally installed connector outdoors. (Which also has the advantage of a nice warm (a consideration here in New Hampshire), well lit ham shack with a chair, table, and easy power for the soldering iron and heat gun.

[@jddr.jkindle9708]

That is actually RG-8x coax, not RG-8. 01:15

[@silasdogood3030]

Hello Josh, the radio setup for the video " Disaster Preparedness: Emergency Communications for Your Home @HamRadioCrashCourse" could you please give a detail list of the equipment that was used for that video. I really like that setup and would like to look into buy that system.

[@patrickdemeyer2210]

try putting it under ground ,15 cm, i did . Noise -145 dBm , signals -60 dBm, Just use it for listen only . Works perfect.

[@jimdaly8984]

Was there not an easier way to put the cable under the slabs

[@papachuck6007]

I'm tempted to do this and try it as a TX loop too off my tuner, I don't have good options on this property to hang an antenna. Last property I had a 660' square loop, worked amazingly

[@Deacon72]

I've been running the LOG for a bit now -- very useful in my area -- cuts out a lot of the noise.

[@phildurall7466]

Nice results Josh! I made a similar antenna with an binocular core for the transformer @ 75 ohms impedance, and used double shielded RG - 6. I positioned it in the only place I had room (under the mobile home) and it seemed to be a great coupler into all manner of noise occurring above in the home. I have abandoned it and opted for a broadband discone antenna that I use for my RSPdx across all bands. It limits my noise while still yielding usable signal strength. Tnx! 73 - KF6IF

[@jimhammer2638]

Using water to cut your way under the sidewalk will undermine it and cause it to crack down the road. Better to pound a ground rod under the walkway instead. Its a pain, but you wont have any problems later on.