Ham Radio: The Cobweb Antenna

Ғылым және технология

Now the higher HF bands are waking up let’s look at an antenna with a small footprint that more than punches above its size.
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73.

Пікірлер: 95

  • @Ishybunny16
    @Ishybunny166 ай бұрын

    Steve Webb is my grandad. He doesn't talk to me about it really and only heard about the cobwebb from my mum who used to do the soldering.

  • @markg6jvy135
    @markg6jvy1353 жыл бұрын

    Nice informative video Tim 👌 Sure you’ll soon have that new space filled up with gear 😉👏👏

  • @Paddy_Roche
    @Paddy_Roche3 жыл бұрын

    Food for thought there Tim, thanks for the video. Massive congratulations on your Subscriber count my friend. I remember you reaching 400 for goodness sake. 👍🏽

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Thanks Paddy, you have been with me for the long haul and it’s fully appreciated mate 73

  • @sydei3ieb204
    @sydei3ieb2043 жыл бұрын

    Great info on the antenna, Tim. Congrats on the move in to the new shack. Looks a lot warmer that the shed! I can't wait to see it fully decked out. Keep the videos coming and thanks for making them. 73's De Syd EI3IEB

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Thank you Syd and for your support 👍

  • @sydei3ieb204

    @sydei3ieb204

    3 жыл бұрын

    @@timg5tm941 Hay, you are doing all the work Tim! I'm getting all the rewards.

  • @mikes6844
    @mikes68443 жыл бұрын

    Hi Tim, I’ve had one of the Steve Webb originals for quite a few years now and been very happy. It does sit on a crank up mast so I manage to get it up to 35 foot. When not in use it just sits above the ridge of the roof, not very visible to the neighbours. Highly recommended. Thanks for the vid 👍🏻👍🏻👍🏻

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Sounds like a good set up Mike 73

  • @ZL1BQDRoly
    @ZL1BQDRoly3 жыл бұрын

    Great to see the new shack in action.....cheers

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Cheers Roly

  • @TomG2NV
    @TomG2NV3 жыл бұрын

    Very good Tim! Interesting type of antenna, with lots to recommend it ,small footprint, resonant multi element with no rotator required and pretty easy to make your own! I've read lots of reports suggesting they work well without having to be at great heights, It would be interesting to do A/B testing with two identical Cobwebs at different heights. 73, Tom

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Agree Tom... I think 30 v 10 feet would be useful

  • @tixilx
    @tixilx3 жыл бұрын

    Good Stuff - As always ☘️

  • @andyM7XTT
    @andyM7XTT3 жыл бұрын

    Great video tim didnt realise they were that small.going to go have a look 👍

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Worth a look certainly

  • @Ray_M0MXN
    @Ray_M0MXN3 жыл бұрын

    Thanks Tim, shack looking cool 😎

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Thanks Ray 73

  • @donalfinn4205
    @donalfinn42052 жыл бұрын

    This is my go to channel for aerials.👍☘️

  • @timg5tm941

    @timg5tm941

    2 жыл бұрын

    Cheque's in the post!

  • @Isszarya
    @Isszarya3 жыл бұрын

    Had the original cobweb fantastic wish I had it now

  • @isanac81
    @isanac813 жыл бұрын

    Excellent video!!!

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Thank you!

  • @chrisbartlett6022
    @chrisbartlett60223 жыл бұрын

    Love the echo Tim, means you have space to put stuff :-)

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    That’s the plan 👍👍

  • @mezzoono
    @mezzoono3 жыл бұрын

    Hi Tim, I’ve had one of the Steve Webb originals for about half year now and been very happy, particularly with the 30 & 40mtr add-on.

  • @G3PWP

    @G3PWP

    3 жыл бұрын

    Hi Collin could you tell me where you purchased your add on kit or did you make it yourself ? warm regards Mike

  • @mezzoono

    @mezzoono

    3 жыл бұрын

    @@G3PWP done all the math myself and build - Thanks Mike love yr work

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    The 40m add on sounds a great idea

  • @MikeM0XMX
    @MikeM0XMX3 жыл бұрын

    I have had a Cobwedd up for around two years now. My is the the MFJ -1835. It took a but of reworking when I bought it (new from a local emporium). It is the single wire version. I have since re-strung it with good quality wire and paracord. It is now great and resonant on most/all parts of all the bands. 73

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Yes I hear lots of stories that the MFJ version can require additional engineering. Sounds good 👍

  • @ianxfs
    @ianxfs3 жыл бұрын

    Another tip is to make sure the element end joining cord is not water absorbent as apparently this can affect the SWR in the wet. Thanks for the video Tim 👍🏻

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Cheers Ian

  • @mezzoono

    @mezzoono

    3 жыл бұрын

    Can also contribute to rain static interference - have sealed the ends of my cobweb wires and is now quiet !

  • @tomcruiser2407
    @tomcruiser24077 ай бұрын

    Great video, yes I have one and it is (was) the best omnidirectional antenna. Where there is a lot of light there is also shadow. 1. Very narrow band. 2. extremely sensitive to moisture and 3. very sensitive to a lot of snow. Mine was totally destroyed this year and the elements were completely pushed down. And now I'm thinking about whether I should buy or build one again.

  • @timg5tm941

    @timg5tm941

    7 ай бұрын

    Glad it worked for you!

  • @theoldhobbit3640
    @theoldhobbit36403 жыл бұрын

    Hi Tim. I have to assume all is well on the C19 front and no worries. Nice looking shack and I bet it will look really great when you have fully moved in. I cant really get HF at my QTH simply because I have a really small garden and a overly cautious XYL HiHi and even a glorified cloths lines is out of the question. Thanks for sharing and Im sure there will be those who will give this antenna a consideration. 73

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    I’m all good thanks mate! You do very well with your 2m portable set up 👍

  • @theoldhobbit3640

    @theoldhobbit3640

    3 жыл бұрын

    @@timg5tm941 Just ordered a 6ele 2mtr beam and a rotator so I can operate from home on ssb and take part in the 1st Tuesday of the month competition, really enjoying and expanding on the 2mtr front. 73.

  • @alzeNL
    @alzeNL3 жыл бұрын

    Hi Tim ! Glad to see you are well and thanks for another fantastic video. I was wondering with your new 'shack' you could do something on cable management/keeping cables tidy. For a computer this is straightforward, but with a transceiver, computers and all the other wires/connectors, would love to know a good way to keep things tidy and safe/working for radio use. My shack is amess of cables and i cant find a good video on amateur radio cable management anywhere !

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Ah a nice idea! Thanks 👍👍

  • @Isszarya
    @Isszarya9 ай бұрын

    Another one on the way cant wait

  • @ReedAB8AS
    @ReedAB8AS3 жыл бұрын

    Cool!

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Thanks!

  • @garyh8315
    @garyh83153 жыл бұрын

    I like the cobweb design. I live in a hollow, so take off is limited and do not want knitting all over. A little height with this would be nice.

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Very good antenna for its size certainly

  • @xxxjesmarco
    @xxxjesmarco Жыл бұрын

    Keep watching your videos even when its in inches en feets..you are a Engelsman , be a engelsman.great voice even with that echo.... ThankYou

  • @timg5tm941

    @timg5tm941

    Жыл бұрын

    Thank you!

  • @PeteSnipe
    @PeteSnipe2 жыл бұрын

    Just revisited this vid as am thinking about constructing a Cobweb myself. Interesting comments about characteristics during precipitation. Whilst can't predict the performance of the antenna, I can predict the critique from my wife as I erect another blot on the landscape... Anyway, it was good to hear your comments

  • @timg5tm941

    @timg5tm941

    2 жыл бұрын

    Thank you, Peter - I have similar considerations here! 73

  • @Isszarya
    @Isszarya9 ай бұрын

    Tim please get one

  • @BoB4jjjjs
    @BoB4jjjjs3 жыл бұрын

    I have plenty of spiders and it is time they made their keep! Could I make an aerial look like a washing line me wonders? Two washing lines, would the land lord fall for that? :-l

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Worth a try!

  • @netwarecracks7780
    @netwarecracks77803 жыл бұрын

    nice shack Tim, I'm still in the shed!

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Ah... I still miss the shed!

  • @ynot6473
    @ynot64733 жыл бұрын

    try a large cloth wall hanging, it'll break up the plain walls, and soften the echo.

  • @acestudioscouk-Ace-G0ACE
    @acestudioscouk-Ace-G0ACE3 жыл бұрын

    Another informative video thanks Tim! 4 metres is becoming popular in my part of Berkshire, do you think you could push a cobweb/b to 6 and 4 metres?

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Oh yes absolutely.. some vendors sell a 7 band version to include 4 and 6

  • @acestudioscouk-Ace-G0ACE

    @acestudioscouk-Ace-G0ACE

    3 жыл бұрын

    @@timg5tm941 Thanks for the feed back Tim, that could be useful.

  • @michaelm1keyhardy865
    @michaelm1keyhardy865 Жыл бұрын

    Wish you would put some of those tiles in your room like callum lol

  • @timg5tm941

    @timg5tm941

    Жыл бұрын

    I like doing things my way

  • @mrsmith2687
    @mrsmith26872 жыл бұрын

    Hi Tim, some great videos you have here on KZread, I am looking at a multi band cobweb but it would need to be mounted in the loft, is this possible do you think or would I be better off using and EFHW sloper, I am in quite a restricted area so as stealth as possible or loft mounted Thanks

  • @timg5tm941

    @timg5tm941

    2 жыл бұрын

    A cobwebb is 8 feet square so you will need a decent attic in terms of space as you will need a good few feet of clearance from the antenna. I have seen a few designs for fan dipoles in attics - you can zig zag to fit in 40m for instance. OR you can feed as big a dipole as you can fit with ladderline to an atu via a 1:1 or 4:1 BALUN and multiband that way. Hope that helps.

  • @ben2e0omr
    @ben2e0omr3 жыл бұрын

    Cal's a poet but he doesn't know it!

  • @gm4vyq
    @gm4vyq3 жыл бұрын

    Hi Tim. Great video put out just when I was thinking of making one. Out of interest, as I am very limited getting any height to an antenna, if this was 4m high would it show some NVIS characteristics? Look forward to seeing the finished shack. 73. Liam GM4VYQ

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Hi Liam like any dipole the nearer to a Halfwave in height the lower your take off angle (unless you go appreciably higher than half wave in height which can cause Nulls as well as lobes). At 4m you are nearly a Halfwave on 10m. You’ll still make contacts and occasional DX at that height even at 20m. 73

  • @ynot6473

    @ynot6473

    3 жыл бұрын

    NVIS only works up to about 8MHz, so this one isn't applicable to that kind of propagation.

  • @lee.m.bennett2635
    @lee.m.bennett26353 жыл бұрын

    Tim gets an "echo mic" ...hehe

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    Ha!!

  • @Isszarya
    @Isszarya9 ай бұрын

    Twin wire is the best

  • @MAV8865
    @MAV8865 Жыл бұрын

    Tim - since this video is now 2yrs old, did you get around to a buying a cobweb and if so how do you find it?

  • @timg5tm941

    @timg5tm941

    Жыл бұрын

    Hi Martin, no I didn’t sadly

  • @andyM7XTT
    @andyM7XTT2 жыл бұрын

    Hi Tim,would the cobweb antenna at 35ft beat a hustler ground mounted vertical for dx?? Hustler works great but want better and no room for a hexbeam as already tried that.cheers

  • @kevhaworth5313

    @kevhaworth5313

    2 жыл бұрын

    Verticals need good ground systems or be close to saltwater to excel. Try between 16 and 32 radials as short or as long as you can get them, more short ones are better than a few long ones. You may notice your SWR goes up, this is down to ground losses being reduced as the efficiency is improved. It also depends on the bands you want to work. I have a Cobweb at 35 feet and If I can hear a station, I work them. I also use verticals close to or over saltwater, they are superb performers then. If you can't get close to the sea, this is how a 1/4 wave plays over a VERY good ground system, 100 plus radials. kzread.info/dash/bejne/d4t3trJuXc-xY7w.html

  • @timg5tm941

    @timg5tm941

    2 жыл бұрын

    Kev's explanation below is spot on

  • @andyM7XTT

    @andyM7XTT

    2 жыл бұрын

    @@timg5tm941 cheers guys but had both up now for few months and must admit the cobwebb out performs the vertical 99% of the time and ALOT less noise :) am using around 280 meters of radials on the hustler and am about 1 mile as the crow flies from the beach.bith performing very well BUT cobwebb swr changes ALOT in the wet

  • @timg5tm941

    @timg5tm941

    2 жыл бұрын

    @@andyM7XTT great to have the options 👍

  • @andyM7XTT

    @andyM7XTT

    2 жыл бұрын

    @@timg5tm941 defo mate,now to get the 80m efhw back up ...surprising how much you can fit into a 40ft garden :)

  • @robdaines2448
    @robdaines24483 жыл бұрын

    hi thinking for buying a cobweb but will need to go on our apartment block it is approx 25mtrs above ground is this going to be a problem thanks rob

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    At that height it’ll be a very nice antenna

  • @robdaines2448

    @robdaines2448

    3 жыл бұрын

    @@timg5tm941 ok thanks will give it a go and will let you know down the line

  • @americaswayout4489
    @americaswayout44893 жыл бұрын

    what is the full length from end to nd of the two poles '

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    On the cobwebb .. each of the four sides is around 8 to 9 feet long so 2.5-2.7m approximately

  • @americaswayout4489

    @americaswayout4489

    3 жыл бұрын

    @@timg5tm941 Tim, I have the mount and some solid fiberglass poles that are 7ft11inches, with they be long enough?

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    7/11 sounds short ..

  • @americaswayout4489

    @americaswayout4489

    3 жыл бұрын

    @@timg5tm941 That is why I needed? the actual required length so when I add to the ends it will be enough, thinking of adding some wooden dowls covered by a small pvc pipe, if it is just a few feet?

  • @timg5tm941

    @timg5tm941

    3 жыл бұрын

    @@americaswayout4489 that could work

  • @isidooliveri5286
    @isidooliveri52862 жыл бұрын

    Troppe chiacchiere e pochi dati tecnici

  • @timg5tm941

    @timg5tm941

    2 жыл бұрын

    Rinomato

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