HAM RADIO - Eliminate the NOISE !!

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ZL1BQD - Roly

ZL1BQD - Roly

Күн бұрын

Join me as we conduct and EXPERIMENT together and investigate one way of reducing the noise on low bands for a typical URBAN LOT.
Yes, you are invited to experiment along with me and lets compare results.
Please post YOUR findings in the comments below
#HamRadio
#EliminateNoise

Пікірлер: 216
@SuburbanDXing
@SuburbanDXing 3 жыл бұрын
Great to see more videos like this; helping out the urban and suburban DXers like us. I use a KK5JY Loop on Ground RX antenna. I tried to post youtube links to the build and the results here, but the comment appears to have been blocked. Thanks for posting this video, Roly...great stuff! 73! de WX0V
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Sounds great! I will check to see why comments/links seem to be blocked...they shouldn't be....cheers
@dave6501
@dave6501 Жыл бұрын
Thank-you Roly. I really appreciate your insights and advice. Great work.
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
My pleasure!
@dhavlena
@dhavlena 2 жыл бұрын
Thanks much! Currently fighting noise while listening to the aircraft NDB beacon band, below the AM broadcast band and your video gives me hope! 60 years licensed & I’m back to mainly SWLing! Best wishes from the north of Michigan, where it’s currently minus 22 degrees C ! Dennis W8MI PS our daughter recently did her Student Teaching in Howick, Cockle Bay, not far from family friend, the late Brian Egan, ZL1LE
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
HI Dennis Cockle Bay is only about 5Kms away from my QTH, know it well Knew Brian very well also, we were often sparing partners chasing some elusive DX......cheers
@zl1az916
@zl1az916 3 жыл бұрын
Very good Roly, nice solution, look forward to the preamp`d rx, all the best to you & thank you for taking the time to publish the videos.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Cheers, hopefully this coming week sometime.....
@inthegapministries5053
@inthegapministries5053 3 жыл бұрын
Wow great result, inspires me to give it a go....
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Go for it! And let's know how you get on.
@gbujold3552
@gbujold3552 3 жыл бұрын
Looking forward to this series, I have ordered my DX wire and will be doing the same around my yard. Looking forward to the next video.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Give it a go and please report back here and let us know what results you get. I sure would be interested in knowing... cheers
@ROBByJONEs-2
@ROBByJONEs-2 8 ай бұрын
Hi Roley im Rod VK4FR and weve never worked that im aware of. im 75 and stopped log keeping immediately it became law.. Sir i love your inastruction videos. i also have horrendous S/N and im goint to try your method.i also only have a suburban lot but ill duplicate as best as i can,my driveway also is an issue i thought was a no no burying antennas [rx]. but TY Roley for giving this greyhaired ham a real chance to get my station better.. gud dx Sir.god bless and gud health t u n urs 73 kn
@pa7rw639
@pa7rw639 7 ай бұрын
Thanks for the lesson learned. 😊
@keith5344
@keith5344 3 жыл бұрын
A good lesson learnt, now really want to give this a go.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Please do Keith and then post YOUR results here. I would love to see what others find......cheers
@samscement
@samscement 3 жыл бұрын
Great video Roly, going to try this myself, thanks for sharing, cheers 🥂, !
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Tremendous, let's know how you get on... cheers
@KevinSmith-zy4rt
@KevinSmith-zy4rt 3 жыл бұрын
Great video thanks for all the good info.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
You are most welcome...more to come
@mike-M0MSN
@mike-M0MSN 3 жыл бұрын
Great upload Roly, great results.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Thanks Mike 👍.... Next will be a video with a low noise amp in line....cheers
@g0fvt
@g0fvt 3 жыл бұрын
Hi Roly, that is a fascinating demonstration/experiment, some time ago I ran a very low wire (not a loop) close to the ground and I also found an improved S/N, it was fascinating to use it to feed the sub-receiver and listen in "stereo". In common with you there were a few places that have stopped me making a full loop, it never occurred to me to go underground for those sections. I shall have to investigate, as for the apparent insensitivity it may be interesting to see what passive impedance matching can achieve, but I know you are continuing your work. 73
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Agreed, a passive impedance match is next on the block. Goodness knows what it is at the moment but a proper 1:1 match will at least achieve max energy transfer in the system. Cheers
@ROBByJONEs-2
@ROBByJONEs-2 6 ай бұрын
TY Roly..@@ZL1BQDRoly
@wfwtheradioguy3414
@wfwtheradioguy3414 3 жыл бұрын
Nice work Roly... it sure makes a big difference. I feel sorry for you urban hams with all the noise ....I live way out in the country with no neighbors within a 6 mile radius.... it's quiet out here.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Pfft ... don't wanna know..... 😜 cheers
@VK4KK
@VK4KK 3 жыл бұрын
Very nice video Roly. Great job on reducing your noise floor. I will live semi rural on a bit more than an acre soon and all neighbours have an acre too so I think I will be very lucky I guess. Keep up the good work mate. 73 from across the ditch. Kevin, VK4KK
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
You make me rather envious Keith. That used to be my circumstances years ago, but now we are locked into suburbia. My only other recourse is to set up a remote somewhere in the country....cheers
@VK4KK
@VK4KK 3 жыл бұрын
@@ZL1BQDRoly Fair enough Roly. I am sure though that you have other advantages where you live such as proximity to shops etc. We need to drive at least 20 min to get to a decent grocery store. Everything in life is a trade off :-) Remote sounds good to me. I think you are in the process of looking into that already if I remember your chat with Callum correctly.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
@@VK4KK You remember well Keith.
@iz2mgn
@iz2mgn 3 жыл бұрын
Excellent job. I’ve done a loop on the ground vy simple and not so big. Often using the preamp of the rig it’s enough.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Yes, the preamps in most modern rigs seem to be more than adequate. The danger with using a high gain low noise amp is front end overload particularly with SDR type radios....cheers
@skinny-peters-JR.
@skinny-peters-JR. 5 ай бұрын
Good info. Mike from Minnesota.
@so8oo
@so8oo 2 жыл бұрын
Receive loop doesn''t need to be above ground. I'm running websdr (can be found on PA3FWM websdr site - search for so8oo websdr) using loop on ground antenna. There are ofcourse better antennas, but considerig used space it is a great performer. I make automated FT8 reporting to pskreporter - search there for SN0E station. There are spots from all over world. My antenna is lying on the ground, it is rectangle (6 m x 6 m) fed in the corner. Proper feedline decoupling is a must!
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Thanks for sharing....cheers
@timg5tm941
@timg5tm941 3 жыл бұрын
Nice work again!
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Thanks Tim... Cheers
@HamRadioLiveShow
@HamRadioLiveShow 2 жыл бұрын
Roly TERRIFIC VIDEO!!! I’d love to use it to help others. I’ll credit your channel and put a link to it in the description section. We’ll laid out and relaxed. Keep up the great work!
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
Cheers, you are most welcome.
@TheGmr140
@TheGmr140 Жыл бұрын
A great video, well done
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
Thank you... cheers
@TheNoCodeTech
@TheNoCodeTech 3 жыл бұрын
Fantastic video mate. thanks
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Glad you enjoyed it...cheers
@daveg0aix206
@daveg0aix206 3 жыл бұрын
Good video Roly. I have similar results from a homebrew K9AY loop on 160,80 & 40M noise floor drops to -140dbm! But I live in a small village with solar panels on neighbouring properties so problem at the moment not so drastic as yours.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Let's hope it stays that way Dave. Mind you, 80mtrs has always been my favourite band so i am quite used to scrubbing in the noise trying to pick out DX...... cheers
@ol2tmx
@ol2tmx 2 жыл бұрын
One of the best noise reducer / eraser is implemented in the Malachit DSP 2 receiver. The filter setup of this Russian device is very efficient .
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
I don't know this piece of equipment, i will have to do some research on it ....cheers
@kevinkc3onohelijeepworld953
@kevinkc3onohelijeepworld953 3 жыл бұрын
Omg a full wave loop at 30’ high fed with balanced open space Feeder and you ll be S9+10 into the states can’t wait Roly
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
That's a fiine dream to have Kevin...cheers
@DnBclassictunes
@DnBclassictunes 2 жыл бұрын
Good video. Many thanks
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Glad you enjoyed it...cheers
@M0SZT
@M0SZT 3 жыл бұрын
very nicely done!
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Thank you.....more to come....cheers
@Nicktgrief
@Nicktgrief 3 жыл бұрын
really interesting Roly I have a W6IUV preamp to build and always thought about putting it on a loop (like a wellbrook) but this looks interesting my only problem is there's a whole lot of concrete where I'd like to return to the shack so I''d have to come up to about 7 or 8 feet then it starts to loose some of the benfits either that or I bury it and return it back along the same route for about 15 feet making a sort of ladder line ... I think this is a 3 mug of coffee problem 🤣
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Maybe even a 4 cuppa...... Well the old adage of "suck it and see" comes to mind..... Please let us know how you get on with the preamp. I have one here which is very suitable, however the concern i have is front end overload to the Receiver. The IC-7300 has plenty of "preamp" as it is so an additional 30dB up front maybe a little much.......cheers
@TheSmokinApe
@TheSmokinApe 3 жыл бұрын
Fantastic video Roly 👍
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Thanks APE, more to come ....cheers
@aaronlynch139
@aaronlynch139 Жыл бұрын
this was really good Roly. Never ever considered those electric fence stand-offs. Perfect. I have enough space here for approximately a 100m loop. That would probably help me with low band dxing. I have an inverted L on 160m that cracks out, but is noisy of course. This would likely be the solution. I also have horrendous powerline noise, so this may be of assistance there too. 73, Aaron VK2ON
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
Glad you found them useful. I have used these standoff on numerous occasions with great success. Cheers
@aaronlynch139
@aaronlynch139 Жыл бұрын
I'm going to screw the stand offs into colourbond Roly. What do you think. Will such close proximity to a another conductor mess things up?
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
I would be a little cautious, the colour bond could act as a shield...... give it a go and let's know :) cheers
@frankeichel1604
@frankeichel1604 3 жыл бұрын
Thanks for the inspiration, Roly. I am in a noisy urban environment, too, so I will give the loop a try. I can make quite a long one as I have a long 10 metre wide Greenway behind me. I suppose you are using the radials to ground the coax braid? 73, VE7AWV.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Yes the coax braid is connected into quite an extensive radial field... cheers
@johnconnor3560
@johnconnor3560 3 жыл бұрын
Thanks a lot. Also, I noticed that the RFG was on, you may want to take a look at the gain settings after switching antennas, thanks again.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Great observation John, thank you. I certainly will have a look at that again...cheers
@skinnyflea2628
@skinnyflea2628 3 жыл бұрын
Good video! I went the Loop on ground route and it helped a lot.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Brilliant. It is not perfect but every little bit helps in a noisey environment.... how large is your loop ouy of interest? ..... cheers
@skinnyflea2628
@skinnyflea2628 3 жыл бұрын
@@ZL1BQDRoly It is 60ft (15ft a side) in a square fed in a corner with rg-6. I followed the design off KK5JY’s page. Very interesting read and design. It’s 60ft so I get 20m coverage.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Great, thanks for the info. Yes KK5JY has an intersting page for sure. It does seem that "one size does not fit all" though and each install really needs a little fine tuning.... cheers
@ianxfs
@ianxfs 3 жыл бұрын
Nice one Roly, although I was jealous of your starting position noise floor! You can easily flip the radiating plate connection on the DXC over to the lower ground radial plate, thereby adding one large loop-radial to the setup when in use as a vertical 😀
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Yep thought of that... Cheers Ian I will link your work on this in the description below.....
@VK4IM
@VK4IM 3 жыл бұрын
I recall using a loop antenna on 80m late last century. It had many poles holding it up and was anything from fence height to 11m high in places, but was quiet and worked brilliantly from VK4 into VK6. Only thing I never figured out how to do was automatic switching from TX to RX at 400w (or 1.5kw for those that can use it). Thought about automotive relays but wasn't sure if they were OK at HF. Cheers Adam VK4IM
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Ahh switching is always a problem in the traditional sense. Many of the modern rigs have a seperate Rx input which is automatically switched on Tx. That feature is what i am using.....cheers
@VK4IM
@VK4IM 3 жыл бұрын
@@ZL1BQDRoly Hi Roly I Looks like you were using an IC-7300 in the video. I'm guessing your using the INRAD RX7300 reciever mod or similar?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
@@VK4IM 👍 cheers
@Ei2iP
@Ei2iP 3 жыл бұрын
I use a MFJ 1026 and rx antenna that can receive the local noise as good or better than my main HF tx vertical, using the mfj 1026, I can phase out the local noise no problem...Works for me de Ei2iP..
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Thanks Robbie. Is that local noises that can be individually singled out, say a local plasma TV or does it deal to the total noise floor? Whatever works is always good news of course... Cheers
@jodiemartine
@jodiemartine Жыл бұрын
WOW... that 's amazing...I am an SWLer in Queensland Australia and I would sure like to try that
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
You should!
@Znobyrd
@Znobyrd 2 ай бұрын
I'm a new Ham. How do you connect a loop antenna to the coax, do both ends connect to the inner coax conductor, or one to the inner and one to the outer conductor? And is a balun used? Thanks, and great video.
@mm3nrx
@mm3nrx 3 жыл бұрын
Nice even to hear a signal weak over not at all is obviously a massive improvement...bin those 100 foot towers :D
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
I miss the large tower i used to have but that is simply not possible on my suburban lot......so just have to try and find other ways around the problem..... Cheers
@jamdiversified9698
@jamdiversified9698 2 жыл бұрын
how do you connect this to the radio? Is it just one end to the centre of the antenna input on the radio and the other end to the earth side? Or is a balun or something needed in between?
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Yes i do have a small matching balun to connect the loop to the coax... cheers
@chrisbartlett6022
@chrisbartlett6022 3 жыл бұрын
Interesting Roly. I experimented with a loop round my Garden, must have been around 120 or more yards ish, around 1 foot off the ground. However I used some electric fence wire I had hanging around and a 1 to 1 balun to connect them to coax. My results were very poor, of course it could have been the balun or the wire was not suitable. The electric fence wire I think is steel wire woven into some sort of plastic string. I do have a part roll of DX10 that I might try out with though looking at your results. I have a 7300 with the RX ant mod on it btw.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
I was using a7300 for this experiment. The RX Ant mod looks to be very simple and would be ideal for this sort of application.... Cheers
@chrisbartlett6022
@chrisbartlett6022 3 жыл бұрын
@@ZL1BQDRoly I would imagine it might be quite easy to home brew, after all the one I bought is only a couple of phono plugs, some coax and connectors and a small plate.
@JeramieCurtice
@JeramieCurtice 2 жыл бұрын
Great video. I am curious to know, however, could you hook that loop wire up to an SWR and get a reading? If I understand this correctly, it is essentially a ground antenna, so it should have an SWR. If we can read the SWR, then surely it can be fine-tuned even further.
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
That is one way to do it i guess Jeramie, however this antenna is designed for Receive only. The better way to see what is going on is to use an antenna analyser. This will then tell you the characteristic impedance of the antenna and so give you clue as to what ratio balun to use to match your receiver input. cheers
@dougtaylor7724
@dougtaylor7724 3 жыл бұрын
There is NO way I could live in a congested place like that. I have been in the country too long.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
I only dream of the country location i used to have now....... cheers
@alanjones3873
@alanjones3873 3 жыл бұрын
Great instructional video. I know someone who has done this successfully for NVIS so limited range, what range are you getting? Is SSB any better?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
I am using this antenna solely for Receive. On Receive it performs well on SSB and CW....cheers
@petervk5cov17
@petervk5cov17 3 жыл бұрын
Hi Roly, I have a Colorbond steel fence on three sides of my property. The DX Commander works reasonably well at 2m from fence. Would you recommend putting the wire loop 30cm above the fence or run it inside the fence 30cm off the ground?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Probably inside the fence off the ground.....but suck and see i guess.....cheers
@TFuzz58
@TFuzz58 3 жыл бұрын
Inspirational video Rolly. I now have a reason to build a decorative fence around the front of my yard and the rest is easier. How do you terminate the downstream end of the wire? I’m very close to writing my exam (just a matter of scheduling during COVID) and with a little luck will be getting a DX Commander in June so will be looking at doing this in the very near future. Cheers from Moose Jaw. Tim
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
There is no termination of the wire downstream as you would do with a beverage antenna for example. It is a continuous loop with one end of the loop to the centre conductor of the feed line and the other end of the loop to the braid of the feed line. I just used the base hardware of a DXCommander for convenience.... cheers
@TFuzz58
@TFuzz58 3 жыл бұрын
Ok that makes sense. Thanks for the quick response and forgiveness for misspelling your name. Cheers Roly. Tim
@willian.direction6740
@willian.direction6740 2 жыл бұрын
Adding to your experiment Roly I often wondered why you give me a readability 5 in your RST reports to me from my summit when I sometimes give you R 3 in my RST report in return. I run 8 Watts on summits and assume you run 100 Watts from home. That RX antenna is a great idea. Regards Ian vk5cz ..
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Normally running closer to 50 watts but into a pair of phased verticals pointing your way on 40mtrs. Great for VK SOTA and Parks... cheers
@oldfartonabmx2122
@oldfartonabmx2122 2 жыл бұрын
Hi Roly, reading the comments, I'm a little confused. Is the loop you've made a receive antenna, or a loop of wire connected to ground (the plate on the DX commander that connects to the ground radials) to try and absorb interference ? 73, VK3LSR
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
The loop is a Receiver Antenna. I am just using the base of the DXC as a convenenient means of connecting a PL259....cheers
@Wonoketingal
@Wonoketingal 3 жыл бұрын
HAM RADIO - Eliminate the NOISE !! ❤️ Met pagi sobat Ytb smeoga sukses selalu 😊😊✅✅❤️🙏
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
terima kasih atas balasan yang bagus, cheers
@indridcold8433
@indridcold8433 3 ай бұрын
I put a galvanised wire, for electic fences, around my attic. Unfortunately, it made my noise floor higher. It come from the back of my SDR with the device grounded to the ground lead in the AC outlet. The results disappointed me for noise. The signal levels went way up. But, the noise levels also went up proportionally. I am enjoying a lot more signal, but a lot more noise. As for transmit, I can only transmit on license free bands. I am not an amateur radio operator.
@forextraderradioman
@forextraderradioman 3 жыл бұрын
thank you for this video, interesting and inspiring idea! ... vy73 from Hamburg/Germany, Dietmar, DL4HAO :)
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Give it a go and let's know how you get on. Post your results back here, i would love to see your results... cheers
@WadeAbout
@WadeAbout 2 жыл бұрын
Roly you just gave me an idea for my new QTH!
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Here to please Wade 😊... Let's know how you get on....cheers
@WadeAbout
@WadeAbout 2 жыл бұрын
@@ZL1BQDRoly no problem. Thinking long random dipole down my side fences. About 65m total. Like crab arms
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
"Give it a go" and let's know how you get on....cheers
@larryoob8754
@larryoob8754 2 жыл бұрын
Hey Roly....... I have to figure out a way to get the larger loop configured. ( I have obstacles to contend with....lol..... Did something interesting. 150' of RG6U coax on the ground with the shield and the center conductor soldered together..... WOW factor..... went from S9 noise floor to S3 on 40M. S/N ratio is fantastic....... picking CW right out of the floor...... can't even see the signal on the panadapter from the off center fed. works decent on 20.... but really don't need it there.... my Hex is pretty quite........ I'm looking forward to try it tonight on 80 and 160
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Now that is interesting. So basically all you have done is increased the conductor surface area at the same height above ground...... must have a look at that....cheers
@larryoob8754
@larryoob8754 2 жыл бұрын
@@ZL1BQDRoly Yes......weird.... laying on the ground
@BoB4jjjjs
@BoB4jjjjs 3 жыл бұрын
That makes a big difference to getting that QRP station. Is that a wire coming off the ground plane plate of the DX Commander Roly?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Yes, one end of the loop comes from the driven plate of the DXCommander base and the other end of the loop goes to the ground (radial) plate. I don't have any elements on the DXCommander at the moment so was just using the base components as a convenient way to connect a PL259 into the system....... cheers
@RichRodgersOnline
@RichRodgersOnline Жыл бұрын
Roly, nice video, how did you get a wire under the driveway.?
@ZL1BQDRoly
@ZL1BQDRoly Жыл бұрын
I used a garden hose with running water. It is fairly sandy so i was able to "pus" a hole through quite easily. That method would not work in rocky or heavy clay soils though. Cheers
@jamescstanley5018
@jamescstanley5018 3 жыл бұрын
Hi Roly, I have been thinking about putting a loop around my place, should end up with about 300 feet or so, but as I have a 6 foot wooden fence around the place, with a chain link fence in places, my thinking was to run the loop along the top of the fence. My plot is roughly triangular, in an urban environment, a few hundred feet higher than most of the town, atop what is more or less a ridge line. There is no local industry, but there is quite a lot of housing,, not densely packed but enough to cause a fair bit of noise. Basically the ground conditions are not ideal with a thin, about 18 inches of top soil over the local Cotswold stone. Not sure it makes a difference, but it does drain very well. Would appreciate your thoughts. 73 Jim M7BXT
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Try it along the top of the fence James buy i think close to the ground will work better for you....cheers
@martinvanek5951
@martinvanek5951 3 жыл бұрын
So if I'm understanding this solution, the loop runs from the driven plate of the DX Commander around your property and terminates at the DXC ground plate. Does the loop affect the Tx of the DXC? Thanks for the video Roly. Always enjoyable and informative. BTW did you ever try the 10 meter band, brass tubing half-wave dipole I sent you a while back? If so, was it okay or rubbish in your opinion?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Martin, I am only using the DXCommander driven plate and radila plate as a convenient way to couple a pl259 into the loop. I have NO elements on the DXCommander at the moment and not using it for transmit. When i reassemble the DXcommander then i will have to look for another coupling solution. The 10mtr Half wave dipole sections work very well, but you sure have to be very careful not to bend the smaller sections for sure. I used it last weekend on a SOTA outing actually and made several contest with it.... Cheers
@martinvanek5951
@martinvanek5951 3 жыл бұрын
@@ZL1BQDRoly Good to hear it worked for you. You're right about the fragility of the thinest elements. I built one for 6 meters and the largest element is 1/4 inch. The good thing is that it is light as a feather. I was thinking about building 2 more and putting all three together to make a yagi type array. I installed a Husqvarna Automower for my lawn care a few years ago. It requires a continuous boundary wire that is approximately 250 meter in length. The wire is staked to the ground and not buried like an electric dog fence wire. I'm going to see what happens if I connect my radio to it. I'll let you know. Cheers
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
The old adage Martin, "Give it a go...." Cheers
@xsean
@xsean 3 жыл бұрын
Would that loop just be for receiving or could you transmit through it as well?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
For Receive only Sean. It would only be an earth warmer on Transmit I would say...... cheers
@problemwithauthority
@problemwithauthority 3 жыл бұрын
Hi Roly, I am trying to wrap my brain around this. The addition of a ground loop increases the signal to noise ratio because loops are inherently quieter, but if you key down it will transmit using the 40M element of the DX Commander? Are the effects similar with the other bands? Or is your fenceline a harmonic of 40M?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
No no Ed. I am just using the DXCommander hardware as a convenient way to connect a PL259 to the loop. There are NO elements on the pole at all. I am not using the DXC for transmit at the moment. Just a quick and dirty way to connect a coax to the loop.....cheers
@problemwithauthority
@problemwithauthority 3 жыл бұрын
@@ZL1BQDRoly Thanks Roly, now I can sleep without my mind running all night trying to figure it out...ha.. Cheers
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
@@problemwithauthority Cheers
@W9HJBill
@W9HJBill 2 жыл бұрын
Roly, I'm considering doing a LOG antenna in my back yard. The garden is about 70 feet wide by about 60 feet deep. There is a 6 foot tall wooden fence along the 70 foot length and along the two 60 foot sides there is an aluminum fence. Do you think that putting the wire at the base of the two aluminum fences will significantly negatively impact the loop? I know that I can just throw some wire out there and try it, but I don't have 260 feet of wire just laying around at the moment, nor materials to make the 9:1 balun (?). Also, given that my lot is largely North/South (the 70 foot back fence is maybe rotated 4 degrees anti-clockwise, I would assume that the primary lobes will be at about 41 degrees and 221 degrees, which largely puts most of the signal in unusable directions.
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Interesting setup. The aluminium fence could be a negative factor, i am not sure. The only real way to find out is to "give it a go"..👍......cheers
@larryoob8754
@larryoob8754 2 жыл бұрын
Great video, I have several receive ant's..... amplified 3' loop. random wire, ewe, also a timewave phaser....... sometimes good , sometimes not so good. The LOG with a 9:1 xformer (15' square) is defiantly the quietest but the sig is so low it is a struggle to hear. I'll give your Lot loop a try......... my fear is it will amplify the noise mor than the sig........ we'll see..... Thanks
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
I am ken to see your results....cheers
@tzm1843
@tzm1843 3 ай бұрын
Add a preamp?
@richardtwyning
@richardtwyning 3 жыл бұрын
Morning Roly, apologies, I'm just catching up on important videos I've saved. I'm in a similar situation to you and will probably have a similar amount of noise when I get on HF. Is the loop continuous from centre and back around to the shield? I'll give something like this a go, but my property perimeter isn't nearly as big as yours.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Give it a go Richard, i thunk you will be pleasantly surprised.... cheers
@richardtwyning
@richardtwyning 3 жыл бұрын
@@ZL1BQDRoly is it a complete loop, from coax centre, all the way round and directly back to the outer?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
@@richardtwyning Yes Richard. Currently experimenting with various Balun feeds... cheers
@chrisbartlett6022
@chrisbartlett6022 2 жыл бұрын
Hi Roly, did you do a follow up to this? If you did I missed it. Was going to try it out myself but in hospital at the moment for open heart surgery. I was wondering also if different size loops could be connected to one transformer to make it multi band or did your very big, close to the ground loop give you broadband recieve ?
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Hi Chris, still doing a lot of experiments. I will have another followup video coming out shortly.... cheers
@chrisbartlett6022
@chrisbartlett6022 2 жыл бұрын
Ok, thanks, waiting to see if I get the chest chop today so be a few months before I am messing with antennas again. Looking forward to your conclusions
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
OK Chris, all the very best....looking forward to a good report ...cheers
@chrisbartlett6022
@chrisbartlett6022 2 жыл бұрын
Hopefully be 5 and 9 + 40, blowing the windows out :-)
@cthoadmin7458
@cthoadmin7458 3 жыл бұрын
Hi Roly, interesting idea, I will definitely try it. In the spirit of a scientific experiment, do you have a reference to the theory behind this antenna, how it works, and why it works, and what you might vary to see how the results change? For example if you elevated it would that help or make things worse? Very interesting result…. 73, VK4QP
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
I am trying to get back to this antenna. i did try elevating the wire to about 1 mtr and the results certainly degraded. I noticed this afternoon that more than 50% of the length is buried under the grass and it is working extremely well.......... The trick is to try and NOT pickup any noise component. The signal takse care of itself and can be enhanced with a preamp (experimenting with one as we speak) Cheers
@cthoadmin7458
@cthoadmin7458 3 жыл бұрын
@@ZL1BQDRoly I’d be very interested to see the preamp, will you have some kind of tuned circuit before the preamp, acting as a preselector? You’ve got me thinking now…
@a9beam434
@a9beam434 2 жыл бұрын
Good job Roly but one thing is missing here how to coneect the wire to my antenna system, there is no drawing to show I need more in details please. Thanks A92FF
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Video to come shortly... please check your gmail .....cheers
@adyg6ad73
@adyg6ad73 3 жыл бұрын
That must have a great moment when you heard the signal on the loop. I have experimented with a RX only loop on the ground made by good friend Tom G2NV. I did get a significant drop in noise floor with low but readable signals. It comprises 20m of insulated wire in square loop on the floor fed by coax through a 12:1 binocular style ferrite.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Thanks for the feed back, i will take a look at this system for sure... cheers
@jamesbuckley5330
@jamesbuckley5330 3 жыл бұрын
Be interested in how long the wire is and the length of your radials. I’ve a 49:1 end fed and to get on 80m it’s 40m of wire which I was struggling to put up. I didn’t consider running it around the perimeter. May give it a go.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Give it a go James and let's know how you get on....cheers
@pauls9440
@pauls9440 3 жыл бұрын
You only need 20m of wire for 80m, the other half (the earthy side) can just be sloped down to fence height in any old fashion or thrown under the house etc
@kishor_VU2MZT
@kishor_VU2MZT 2 жыл бұрын
HIII ROLY GREAT INFO ,,, I HAVE ONE QUESTION , WILL ACTIVE NOISE CANCELLING HEAD PHONE DO JOB HF RADIO NOISE SUPRESSION AND ALSO Ground Loop Noise Isolator for Car Audio/Home Stereo System with 3.5mm Audio Cable WILL WORK OF REDUCING HF NOISE , KINDLY COMMENT ON IT
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
This video is about RF noise not noise induced into audio systems or physical noise. Your suggestions won't help much with atmospheric RF noise, cheers
@anonymous_friend
@anonymous_friend 5 ай бұрын
Is this a listen only loop or is it tuned to transmit on?
@ZL1BQDRoly
@ZL1BQDRoly 5 ай бұрын
Yes, for listen only. It could be made for transmit but the components would have to be "beefed up" to cope. Primarily for listen though simply to beat the noise as much as possible.
@batfalcononyoutube
@batfalcononyoutube 3 жыл бұрын
I suppose that this loop antenna is for receive only, right? Well, since it is impossible to give it a try in my property, ( I live in a multi floor building), I can though install it on the roof top. Is it a possible solution to reduce the noise? The roof top is almost 10 m above ground.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
My gut feeling is that it would not work on top of a roof of a multi floor building. It has to be very low to the ground so that noise shoots over the top of it so to speak.... BUT, give it a go, maybe it will work? ....cheers
@batfalcononyoutube
@batfalcononyoutube 3 жыл бұрын
@@ZL1BQDRoly Thanks for the reply. It's rather difficult to install it, especially right next to the metallic fence all around the terrace. Anyway, thanks for the info and the help. 73 de SV1SLB
@fredroessler
@fredroessler 3 жыл бұрын
If you have roof top access for antenna work, why not put up your loop but instead of laying it on the surface of the roof raise it above the roof just as much as you can
@batfalcononyoutube
@batfalcononyoutube 3 жыл бұрын
@@fredroessler I already have done that. In fact the loop is around 7 m above terrace level. Nevertheless the noise is still very much present.
@terrysewell9531
@terrysewell9531 2 жыл бұрын
Roly Great experiment Leaving hope for those of us with QRM How do you use this in practice Switching without overloading the front end WA0EXO
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
I have a remotely activated coax relay that switches out the RX loop and grounds it when I am on Transmit.....cheers
@DAVIDGREGORYKERR
@DAVIDGREGORYKERR 2 жыл бұрын
What about a DSP based Adaptive Noise Filter but you need a Noise antenna but can only be used on RX not TX or you will let the magic smoak out.
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
I have never used one but worth investigating. I have no trouble in letting the smoke soak out, it's getting it back in again that is the challenge.....cheers
@CanadianTreasureHunter
@CanadianTreasureHunter 9 ай бұрын
What do you do when your noise level is over S-9
@johnratcliffe6438
@johnratcliffe6438 2 жыл бұрын
Why is your loop 30cm above the ground, rather than on the ground? I was told to peg mine to the ground.
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Just a practical consideration of being able to trim the garden without cutting or pulling out the wire. Actually, more than 50% of the wire is buried under leaf mould now anyway ...... cheers
@DAVIDGREGORYKERR
@DAVIDGREGORYKERR 2 ай бұрын
Is it noise from the Power Substation or what.
@noelbulls8628
@noelbulls8628 2 жыл бұрын
Does the loop comes back to the ground plate of the DX commander?
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
Yes. One end of the loop goes to the driven plate the other to the ground plate. Remember this is a RECEIVE loop only, I am not using it for transmit......cheers
@noelbulls8628
@noelbulls8628 2 жыл бұрын
@@ZL1BQDRoly I was trying to figure it out by looking at the video several times but I did not get it so you have two plates on it? I thought you come out of the grounding plate go around the property and return back to the ground plate.
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
I am using the drive plate just as a convenient way to connect the centre conductor of the coax feed to the loop. I am not using the plates fro Transmit in this configuration,...cheers
@noelbulls8628
@noelbulls8628 2 жыл бұрын
@@ZL1BQDRoly Can you still transmit with it? Or may have to put a switch to disconnet?
@brianfields4479
@brianfields4479 3 жыл бұрын
hi roly. hpe ur well. I wonder if you found any directivity , depending where you place the feed point, and I wonder, if you took away the grounding side, whether it made any noticeable difference . 73 brian zl3xdj.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Hi Brian Thanks for the input, these are all configurations i will be trying over the next little while. So stay tuned as they say and we will see what happens....cheers
@timmack2415
@timmack2415 3 жыл бұрын
Noise has been a problem for me for years. I've been able, with great difficulty, to solve them all, except my current issue on VHF. It has me utterly stumped. 🤔
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
It sure does take a lot of perseverance to track down some of these noise sources for sure.... I am rarely on VHF/UHF so any noise up there does not bother me. I have enough to contend with at HF !!...... cheers
@mhpreach
@mhpreach 3 жыл бұрын
DMR solves the noise problem on VHF
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
@@mhpreach Helpful, thanks
@TFuzz58
@TFuzz58 3 жыл бұрын
Sorry for misspelling your name Roly, the old grey matter is pretty full of stuff I need to pass the exam.
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
That's fine Tim, my parents were too poor to afford two "l's" in my name, hence Roly. (Actually my name is Roland but my wife started calling me Roly much to the displeasure of my dear Mother.......) cheers
@johnharrison5703
@johnharrison5703 8 ай бұрын
Tried this at my QTH. It reduced the noise but also removed the wanted signals. S9 became S7. Well I could hear and work them with or without noise. The stations replying to my CQ that are sitting on the edge of the noise are taken away also. SN ratio is all good but not much use if the wanted signal is also taken away.
@timsmith428
@timsmith428 3 жыл бұрын
..how are you feeding this Roly?
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
Just straight feed with coax... A 9:1 balun would more than likely improve it more.... cheers
@timsmith428
@timsmith428 3 жыл бұрын
@@ZL1BQDRoly Thanks! 73 de VE6PG/VE3IIM ..
@chazwozza67
@chazwozza67 2 жыл бұрын
DB gain set to zero? Still looked very noisy to me to be fair
@ZL1BQDRoly
@ZL1BQDRoly 2 жыл бұрын
It is the signal to noise that is the important factor.
@DonDegidio
@DonDegidio 3 жыл бұрын
Hi Roly, That is quite an improvement. How much wire do you have strung around your property? You and Gail stay safe. 73 WJ3U
@ZL1BQDRoly
@ZL1BQDRoly 3 жыл бұрын
I will measure it out for you tomorrow Don,...cheers
@DonDegidio
@DonDegidio 3 жыл бұрын
@@ZL1BQDRoly Educated guess good enough, Roly. No need to go and measure it.
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