Can You Use a TV Arial as a SDR Antenna?
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- Опубліковано 28 вер 2024
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Labgear LPCT 4G Compact Log Periodic Aerial: amzn.to/2TwNIR6
20 to 133MHz, 150 to 341MHz, 513 to 670MHz, 795 to 929MHz, 1.1 to 1.19GHz, 1.3 to 1.4GHz, 1.6 to 1.77GHz,1.85 to 2.3GHz, 2.6 to 2.7GHz, 3.2 to 3.3GHz
My brother recommended this channel.
Did not disappoint!
'Scribed!
Happy New Year! Health and Wellbeing!
Just getting started on this hobby and I love your videos, I don't really know much about the frequencies but I will learn it, thank you. Andrew can you post step by step plans for a dummy like me lol. Keep making these videos man you rock..
Damn it Lorin, STOP READING MY MIND!!!, LOL. Great isn't it. Funny how there are no females interested in this, must be the glass frequency.
Just me who are you and how late by have you been into wi-fi actually RF to me it's fascinating and I have learned so much just from watching Andrews videos I was an Engineer for 12 years so I really understood him and he shows passion in each project that he does I have been doing alot if reading in electrical engineering focusing on magnetism, well I can come by bore ya so I'll close for now, hope to hear from you soon.😁😁😁
Long sorry lol
@@lorinrandall3508 Lorin Looooonger SORRY from me, for not getting back to you sooner. I'm just a middle aged guy and I'm hoping to get a cheap yacht and sail around for a few years. My interest is in the ability to get wi-fi from a distance and not have to pay. To be able to get it from the park etc across the road and not have to buy stuff [ coffee, cake, lunch etc ] that I don't want to pay for even better[ no day job when sailing ], to be able to do it from the boat! So any antenna that gives me range would be brilliant. My interest is 100% practical field application.
@@justme.9711 that's awesome and about field application that's what it's all about live 😁 n a rural area myself an no wifi so I found Andrew and have made things already and guess what the science is spot on and it's easy.
Just got my small usb sdr today
I didn't have proper antenna so i could not listen to am and only limited frequency
Thanks for the video
Did you ever do anymore research on the skirted dipole design. Seemed an interesting concept.
Yes You Can!
is there a kind like of "RF SDR" for TV to watch on computer?
there's at least 1 youtube channel that uses SDR to detect a TV signal from Canada that is reflected by meteor trails.
An omnidirectional antenna can be used also say for like this project that seems similar to what you're noting: wiki.satnogs.org/Main_Page
@@jafinch78 Thanks for the heads-up.
how can it work well at 20mhz?? also 3ghz??
So I could use this with my LTE router to get a better signal?
play itcool you'll have to check the frequency of your provider in your are bur LTE uses 800/1600mhz so yes it should work :)
If I wanted to extend my laptop wireless range while Camping. What setup would you suggest. Thank you
What about 450-470mhz?
Sir sdr antena means Wi-Fi ant3 please repl3
Hi Andrew. WiFi in a Motorhome. We stop at sites which have free wifi. Problem is the signal strength is poor and also our motorhome is metal but fibreglass roof. I have been trying to find signal amplifier. But reckon a wifi Extender may do the job. But many are mains powered and we have 12Vdc. Also our technology doesnt have Lan Sockets so wifi to wifi needed. Wifi external hi gain aerial with internal aerial. Plus limited funds so any suggestions plse. Cheers from old George
We take the grand kids away twice a year to a caravan site. It has free wifi but only around the main complex. I use a cantenna pointed out of the window on a small tripod. This only allows me to use one laptop though with a USB wifi. You could use the cantenna or some other directional antenna with a wifi repeater and that way all your devices could connect wirelessly to it. But some open wifi access points will not let you do this though as you are effectively creating a second access point. You need to get a wifi repeater with SMA connections so you can use a directional antenna. Unfortunately these a few and far between or modify your own like I did here: ua-cam.com/video/_pqPLTsx-s8/v-deo.html
Hope this helps
To Receive not for Transmit! A Log Antenna can be Use for Transmit,
sir. make coil dipole antenna for pocket wifi 4g frequency bands 1800+
Cheap Chinese Construction on the Wiring,
7:30 your antenna out of focus there Andrew
Andrew, can you do a vid on baluns explaining their purpose and also how you determine when and not to use them? I have noticed you do not use them on most of your antennas.
You absolutely can, works brilliant.
hi andrew. i have a question . i am from Canada and working on Parrot Disco Unlimited range fpv softmod using huawei 3372h lte usb modem. Can u suggest some diy antenna for my project. most antenna on market say like wifi/lte antenna which is false. please help me with some diy or or otherwise. will really appreciate ur help!!!!
Awesome presentation sir! Great information, tear down and analysis! Some of those aerials even have an impedance matching tunable part that I guess is called an adjustable hair pin impedance match thingy.
I was impressed with the radio shack discone antenna as a broader band SDR antenna. I was thinking they can be modified for lower frequencies also with a modified loading coil and monopole (I was thinking a scorpion or screwdriver antenna design) and modifying the cone elements length maybe with telescoping antennas or like GBPPR did with aluminum threaded rod. I've amassed a collection of aluminum ski poles to work on the heavier duty ski pole discone and some other antennas... though that's for next winter.
Will be fun tuning and watching the spectrum analyzer... interestingly I'm looking forward to doing that more-so than building. Thanks to Steve Jordan also over on that side of the pond for his mini-lathe detailed youtube works.
Long time owner of the classic Radio Shack discone.
Great antenna. I've had one in my attic for decades rx and tx it works.
Unity gain, but that aside a great performer.
Just got my hands on an old satellite dish today and was thinking to convert it to an antenna to recieve wifi from about 2 miles away (no company reliably serves our area)
What kind of cheap DIY antenna would you recommend to replace or modify the LNR for best results? Somewhere under $20 in materials if possible
Biquad, or if it is a round dish then maybe a (short) cantenna.
If you are lucky enough to find a "primesstar " dish you can turn it into a 27- 30 Dbi monster. Hughesnet dishes are also very good conversion candidates.
More modern multi-feedhorn dishes are not perfect parabolas and are designed to get signals from multiple satellites and reflect them to multiple feeds.
They deformed the parabolic section to accomplish this making the focal point into a focal area or band maybe, and this also widens the beamwidth sacrificing some of the gain that could have been.
The good news if you have one of these newer dishes is they are more forgiving of feed placement and aiming errors and you most likely don't need the gain that was sacrificed.
The feed should not be high gain because you want it to illuminate the entire dish so high beamwidth even gain feeds are better than a bright spot in the center of the dish and ignoring the edges.
Avoid long coax cable runs put the client as close to the feed as you can and use USB or ethernet to transport the signal long distances instead of coax.
Cantennas are cheap but a biquad or patch may be easier for you to scrounge the materials needed.
@@NVC77 oh I know, I just meant taking out the old circuitry and using the LNR housing to house the antenna, or the bulk of it anyway to set up the new diy antenna
@@ghz24 so it's a DirectTV dish about 8 years old, I can make either a cantenna or biquad, keeping the LNR mount and just replacing the internals with my DIY antenna so as to keep the focal point as close to the original dish as possible, wondering if biquad or cantenna (or any other) would be best for a 2 mile distance, and have good reception
Hallo Andrew,
as I am new in the SDR world, is this antenna suitable to change it bit for other frequencies (e.g. Noaa 137MHz)? Thanks for any response! Keep safe!
Anyone know if hes ok?
We miss your videos!
Looks great but damn! Poor coverage of 2m and 70cm !!!! That's a real shame for a ham.
Anyway to get those gaps covered?
Btw great vid as usual
Take a file and file away....
Now I wish I still had the rotatable rooftop antenna that my mom let me take apart when I was a kid back in the 80s. I don't think we needed it anymore. Saw another newer one a friend of mine was throwing out, Didn't take it because I didn't have my RTL SDR at the time.
Alusol will let you solder wires to aluminium
Perhaps a cuestion about a loaded dipole antenna?? I may have make a mistake that actually worked as a range limiter in stead of a range extender??
i use one of these they cover 55mhz to 500 they are like a laser beam thou and are not so good on the air band
ua-cam.com/video/6xd2nP5PmjQ/v-deo.html
I use a DAB+ dipole vertical mounted cheap and effective on most bands.
*** Donor antenna offer ****
***Mountable F-Plane ML-2499-PSA1-00 (Is it inverted F-plane, how to utilize, etc) ***** More than happy to mail one to you.****
Hello Andrew, Recently needed to do a setup for a friend and was diggin through my antennas and "refound" a few antennas tht I'm not really clear on how they operate or what they do when they are operational. At first glance they appear to be of a reasonably high quality and I thought of your channel and stopped by to ask you if you may be interested in "doing your thing" (analyzing one of them and perhaps doing a video if you feel it is worthy). I certainly would appreciate your vast compendium of knowledge and experience with regard to these propagators; perhaps you could verify what I believe to be true about them and also fill in the gaps of my limited knowldge. (I'm not a complete dolt (Amateur Radio License (expired)). Well, I don't want to be long winded and am hoping to attract your keen antenna like eye on this one. If you'd liketo have a go perhaps you could bounce your mailing address to me and I'll ship one of them out to you along with the .doc that is with them. Like I said they do appear to be very high qality and worthy of your attention, perhaps. I would be honored to offer a 'subject for your personal edification and hopefully get some very keen insight back from you. Well, my very best regards, hope to hear from you soon. Johnny 4.50 (Solarsails@hotmail.com)
Hello
I have two questions
first question: I want to make a 5.8ghz jammer, as on your video "WiFi Jammer August 2, 2015" to pass all the antennas on the same antenna
second question: do you have a shema of a 5.8ghz long range antenna, like on your video "Long Range Yagi Antenna 19 Element 2 4GHz 29 Sep 2013"
sorry i use google translation
I'm from France
Thank you for your advice
Andrew I hold your word in high esteem, because you know what your talking about - Please can you tell me if There is any hope. If I have a little Macbook Air, is there any diy antenna option to allow me to receive wi-fi from a greater distance with out modifying the source, or what option would give me what distance for receiving from wi-fi.
Hi Andrew,
Could you please tell us something on RF switch es ? I'm wondering about putting two back to back transmitting patches on an fpv plane instead of building a tracking receiver..... what do you think on the feasibility of such a solution ?
An old engineer (not enough RF acquainted ...)
So according to your tests this antenna is not good for TV at all ?
Strange.
Have not got a clue that was not the purpose of the video
Great information video,but a lot was not visible because of camera focus. Thanks.
You can put some Extra Elements to increase the Band Channels,
If its for receive purposes, its not hurting if antenna don't trim
hey Andrew ... please cover antennas for mobile like gsm,lte !!!!
Please make a video on UBNT MIMO micro strip antenna .2.4 GHz
Maybe a good antenna for two SDRs and passive radar
Please check your email. I have a question.
I've moved a 2 minute walk from my parents house, is there anything I could use to pick up the WiFi from there, apologies in advance as I'm not very technical
You can get wifi at 2-3 kilometer 2minutes walk is narrow enough
What’s the best antenna to use for running PDW to
Decode POCSAG around 150mhz?
Or is it impossible to say?
There is no such thing as a SDR Antenna
OK!
So this is suitable for 4G and LTE reception?
If you are near a cell tower that uses the lower frequency bands (7,12,13, and 5 i think) than you CAN turn many tv antennas to pretty good 4G antennas! Those bands are often used in the boonies because lower freq bands carry over longer distances and with more obstacles. Go for the antennas made for UHF spectrum, which used to contain those aforementioned cellular band frequencies! ......obey your local laws on the matter though😁
The old VHF/UHF TV antennas are what you should be looking for.
Does the mounting bracket short the upper and lower boom elements
Yes, and it is meant to. Take a peek at some online log-periodic calculators. They will show you the distance from the rear element to short the 2 booms together (remember that the LDPA is driven from the front. It is a necessary part of the dipole array principle.
@@randallhendricks8230 And the coax cable runs only through the bottom element (where the F connector is)? The top element is empty of coax cable, am I right?
@@Soren_Skarsgard In the case of most mass-produced LPDA antennas the coax does go through the bottom boom for a hot boom design. However, if you are building your own, there is a better arrangement that the coax does not go through either boom, but instead hangs off the front of the antenna and connects to the pole further down. This website goes into great detail to explain why this is important: www.w8ji.com/baluns_on_log_perodic_antennas.htm
@@randallhendricks8230 Wow, thanks! A friend gave me almost the exact same log from this video (no connector - the coax just exits from the back of the lower boom through the plastic plug), and he hacked it from the front, just like you're saying. I thought he was being stupid, haha... Is this hack better for TV?
@@Soren_Skarsgard Separating the cable from the boom improves the performance of all Log-periodics.
Do you mean Can you use a TV antenna as an SDR antenna? You can use whatever you want.
Typical ham more talk than information