MFJ-1835 Cobweb antenna review and testing

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About :

I love this antenna. Available at www.mfjenterprises.com
This is the MFJ-1835 cobweb antenna, that covers 10,12,15,17 and 20 meters, similar to a fan dipole idea with square loops. Horizontal polarization, and can be tuned for different parts of the band.
Support my channel and efforts at www.patreon.com/hamradioconcepts

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    Popular Comments:

J Kruse . 2018-09-11
What is the total radius of the antenna end to end, and how does it hold up in bad weather?
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Digital.Gods . 2018-08-13
Looks good, I'm looking at the MFJ-1838 which includes 40m, plus I can hang my laundry out to dry as well! ;-)
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Harus Difindafer . 2018-03-24
There is a lot to be said about an antenna with low reactance, even at a compromised length. Enjoyable Video, Get the front feet up on that 450 it's driving me nuts.
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Laird Nigel P Lawrence . 2018-01-11
The Cobweb Aerial was invented by Steve Web G3TPW
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Christophe Barbe . 2018-01-06
Awesome videos, thanks for sharing :)
Soon relocating to Canada, so we'll maybe have a QSO someday :) 73 and HNY 2018 from ha7wx Chris
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Douglas Felsenthal . 2017-12-12

Whats your recommend as qrp

Do we have enough radiation resistance
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vincent mckever . 2017-12-04
How about stacking 2 of these puppies? .....N6OA/4
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Ionogram Juliusruh . 2017-10-01
Nice video thank you. At the end of the video you mention to compare the cobweb with the hygain av-680. Is this still on your todo list ? Wonder what the 2:1 bandwidth is of those two antennas. 73
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Isszarya . 2017-09-23
Needs to have twin wire ,it will work a lot better,,,,,,, make one for 50 dollars yourself
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Kevin Hellar . 2017-09-05
Nice video.. you are right under that electrical transformer on the pole....wondering how that affects your performance
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Myron Tanner . 2017-08-28
How did you tighten them up?
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rob finch . 2017-08-26
lazy susan? wassat then?
121 2 . Reply
vonzigle . 2017-08-03
Did you find that the horizontal polarization helped with power line noise, etc.?
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silversurfer12371 . 2017-07-29
I wonder what the dimensions of this antenna are?
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Shawn Wegner . 2017-07-01
Do you. Hav the. Clamps backwards
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David Kreinberg . 2017-07-01
Hi. I just purchased a MFJ-1835. Thank you very much for making this video of the setup. I'm having trouble tuning this antenna and was hoping for some help/advise. I noticed that your wire elements have soldered eyelets on the tuning end where they attach to the insulators. My wire kits only had the soldered eyelets on one end (which I attached to the balun box), but the other end was just unterminated wire that I attach around the screw/nut arrangement for adjusting while tuning.
I was wondering - did your wire kits come with terminators on both ends, or did you solder the terminators to the free ends? I think adding the eyelets would assist in tuning at the insulator point, as your video shows.
I am having a difficult time getting the SWR down into a decent range on every band except 20M. That has no problem getting down to about 1.4 in the CW portion where I'm shooting for. The others range in the high 2's to 3's and I can't get them any lower. I've opened up the balun box just to see if all looks well in there. All solder connections are nice - no cold joints visible.
The construction went together quite well in about 2 hours total. Tuning is another matter. I have the whole assembly on a tripod at 6-7 feet off the ground, as you show. I'm using a Rig Expert AA-54 to assist with the tuning.
Any help you can give would be most appreciated! Thanks.
73 de Dave W5ABM
121 2 . Reply
Shawn Wegner . 2017-07-01
How. Tight should I tighten to
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varoujan78 . 2017-06-17
Looks like a loop but Its not a loop. its open in the middle. It is dipole ends bent towards each other. No gain but hi efficiency because of current coupling at the centers and voltage coupling at the extremeties. same principle as the hex beam or Moxon beam or the VK2ABQ rectangle.
121 2 . Reply
KB6YAF . 2017-06-10
Thanks for this video. Say, has anyone tried to extend this antenna with some lightweight fiberglass rods in the ends, enough to add 40m?? One would probably have to mount the antenna in such a way that the mast could stick up a couple of feet past the center platee, then add some poly rope to the ends to support it better.
121 2 . Reply
Isszarya . 2017-06-06
Should be twin speaker wire single wire is a no no
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David Casler . 2017-05-25
Nice antenna and nice demonstration.
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Joseph Sacco . 2017-05-21
Can't get mine to tune.
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Soulwagon . 2017-05-16
Are you still using the 1835 ? If so, how is it performing ? This antenna would be ideal for my qth ,but I've heard the qc with the newer mfj stuff isn't very good. 73
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alphasxsignal . 2017-05-11
Yes the compare using the switch would be great to see. Hope you make that video soon
121 2 . Reply
varoujan78 . 2017-04-29
Are the wires precut and labelled or color coded? are Are the spreaders predrilled and marked, ?
121 2 . Reply
Craig Gilbreath . 2017-04-18
Those center plates look square. How wide are they? Seem to be about 8" to 12" square by my guesstimate.
121 2 . Reply
RGT . 2017-03-23
When listening on SSB, you should be using "slow AGC" instead of fast. Much better receive audio on slow AGC. Good video!
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vi Zin Tø . 2017-03-03
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John Leonardelli . 2017-02-27
great video on how to build it and its on my Dayton list
121 2 . Reply
Wes . 2017-02-27
Looks like an awesome antenna....might try to get one soon.
Thanks for the video
121 2 . Reply
Randy Terrell . 2017-02-22
Good video but would have appreciated some information on the 2:1 bandwidth on each band. At the impedance transformation necessary, would expect it to be relatively narrow.
Good job!
121 2 . Reply
2E0IKM . 2017-02-12
Been using a cobweb antenna here for a few years now and they work very well, its a full size half wave dipole on each band. Also only about 9ft square so doesn't take up much room so great for small gardens...
121 2 . Reply
Sterling K. . 2017-02-08
Does anyone know if the cobweb will work in a valley location?
121 2 . Reply
James Thomas . 2017-02-03
Nice video. I plan on getting one of these ASAP.
121 2 . Reply
Kelly Taylor . 2017-01-23
I thought your presentation was done very well. We see all kinds of Ad's for stuff. However getting out there and putting it together and testing as well as letting other get the scale of these Cobweb antennas.
I say good job.
Look forward to see what you test next
N5STK 73's
121 2 . Reply
humaxf1 . 2016-12-13
Good demo. What are the electrical wire lengths per band? Thx
121 2 . Reply
MauriatOttolink . 2016-12-10
Think you mean 'bear' with me ...Bear like in bearing!
121 2 . Reply
David Cappello . 2016-12-08
Nice video!
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N4BC . 2016-12-07
Great video, Eric! Always look forward to a new one. You convinced me with this one ... I ordered a MFJ-1835 today. I'd been sitting on the fence, trying to decide ... 73 de Dick N4BC
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Karl Kaukis . 2016-11-27
Eric - I appreciate the wind but am not going to bare with your. Not my style.

Regardless, great review on an antenna concept that I for sure am going to use with my station. Am in between antenna construction projects and the cobweb is perfect for the fill. Thanks for the info.
121 2 . Reply
Radio Weak Signal Work . 2016-11-24
Great Review!!! Thanks
121 2 . Reply
Christopher Yelinek . 2016-11-24
Good Evening Sir. I am wondering how much that antenna cost you and if you know of plans to be able to build it. I am in rural Canada on a corner lot in a small town a long way from radio stores and I am a visually impaired amature radio operator.
121 2 . Reply
Frank Zappa . 2016-11-23
Did those power lines in the background just look close, or were they really that close?
121 2 . Reply
Jay Nearnberg . 2016-11-23
Do you think I would be able to assemble the cobweb in an attic - a an HOA community?
121 2 . Reply
GIL LUGO . 2016-11-23
Thnx for the clarification UFO
121 2 . Reply
UFO rover . 2016-11-23
You should be adding the tabs on both sides of each wire equally... if you extend the wire two holes on the one side, extend it two holes on the other, etc. To do otherwise is to unbalance the antenna and cause the SWR to go up at resonance. - Look me up on QRZ .com (N4UFO) and see my 1835 up at 30 feet. So far I've worked Pitcairn Island, Sao Tome, Ghana, and Central African Republic with it, just to name a few. 73!
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lloyd mitchell . 2016-11-23
Dude, NOticed the power lines appear close to your setup. Be careful when raising them. Especially the vertical. Dont want it in the fall zone .
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GIL LUGO . 2016-11-22
That is great...read on e-ham, that someone has used it on 40 meters, which is great...good luck with the new antenna, and may you have many dx contacts...73, de K2YNY
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GIL LUGO . 2016-11-22
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John Zaruba Jr . 2016-11-22
Another helpful measurement would be the SWR bandwidth of the antenna. Per band find the highest frequency and the lowest frequency where the SWR = 2:1, subtract the lowest from the highest and you have the SWR bandwidth of the antenna. That way someone who is, say, a CW, digital, and phone op could figure out where to tune the antenna to best work all those modes without an antenna tuner...73 de John K2ZA
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