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HAM RADIO: 20 metres - Simple DX antenna. Quarter wave vertical.

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Tim G5TM

Tim G5TM

4 жыл бұрын

Easy peasy to build and a very effective antenna for DX!
Details of the mini 1:1 current Balun are here: www.hamgoodies...

Пікірлер: 170
@SM3TEK-Lars
@SM3TEK-Lars 22 күн бұрын
Thanks Tim. Finished a homemade 1:1 balun with 140-43 core and 1mm copperwire and build a 1/4 vertikal today for 20 meters, got it tuned with the help of a VNA. Hopefully I can do some live testing later this week. Used 20 3.5 meters radials made of old network cabel and the ariel is 0.75mm electrik cabel. Mounted on a 5 meter fiberglas fhishing rod and its sitting on my garden fence ground mounted. Nice to see this video on your build. Hope to hear you on 20 meters. 73 and many thanks
@ZL1BQDRoly
@ZL1BQDRoly 4 жыл бұрын
The humble 1/4 wave vertical :) They work well and i always take them with me on my DX-expeditions.
@timg5tm941
@timg5tm941 4 жыл бұрын
Simple works well Roly! Take care and thanks for stopping by 73
@spanners73
@spanners73 4 жыл бұрын
Another great video Tim, I love the simplicity of a 1/4 wave vertical and it goes to show our hobby doesn't have to be expensive. Paul M0TZR.
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks Paul I totally agree.,73
@fredhembree3638
@fredhembree3638 3 жыл бұрын
I just built this vertical a few days ago and was very pleased how easy it was to make and how good it works. Thank you for this presentation!
@timg5tm941
@timg5tm941 3 жыл бұрын
Glad it works well 👍👍
@ianxfs
@ianxfs 4 жыл бұрын
Useful video Tim 👍🏻 Two tips for the viewers: #1 When using the balun for a vertical as in your example, check which side is connected to coax centre and which to the braid, as it’s the centre which makes the vertical element. #2 Often your local radio club has kit for loaning out, so that’s a good way to get your hands on an analyser if they’re a bit too expensive to buy.
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks Ian. I have to say I’ve not had an issue with using either connector of the Balun for either of the vertical elements. A very useful tip about clubs and analysers. 73
@peterdigby1695
@peterdigby1695 4 жыл бұрын
Hey Tim, Love the back to basics approach - Yes it works with a little imagination thrown in - some folks throw cash away !!!
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks Peter. Yes the simple way often works!
@matknight
@matknight 2 жыл бұрын
Thank you Tim, love these type of videos, simplicity at its finest.
@normandavis6569
@normandavis6569 4 жыл бұрын
WB4BKO-Ned Interesting video. Very informative. All the necessary details for building a simple, inexpensive and effective antenna. You proved what a friend of mine, now a silent key and a ham for over 60 years, often stated: "if you paid more than $10.00 for antenna parts, you spent too much". Your relaxed and friendly style of presentation is a plus. I have never used a 1:1 balun on a vertical. Usually five to 8 turns of coax wound around a 2" piece of PVC pipe (when using RG58 or RG8X) near the feed point should be adequate to choke off any RF on the feed line. That piece of PVC pipe also works well as the center insulator. Thank you for your video.
@timg5tm941
@timg5tm941 4 жыл бұрын
Thank you sir for taking the time to watch and comment. Really appreciate it. I’m a big fan of home brewing antennas too. 73
@rickstory8329
@rickstory8329 6 ай бұрын
Thanks for all of the great videos! You are helping a great many fellow hams!
@timg5tm941
@timg5tm941 6 ай бұрын
You are far too kind 73
@acestudioscouk-Ace-G0ACE
@acestudioscouk-Ace-G0ACE 3 жыл бұрын
Another great video, thanks. Particularly interesting for me as I'm station building as a returning ham at present. I was particularly interested in the raised verticals. Some advocate a raised vertial for part of the counterpoise length with the remainder on the ground. Must look into this more.
@AndyWragg
@AndyWragg 4 жыл бұрын
Some of my best work has been a lash up. Well done Tim.
@timg5tm941
@timg5tm941 4 жыл бұрын
Thank you Andy! 73
@26DR715
@26DR715 3 жыл бұрын
Thats funny first could not hear your call sign, only after 3 attempts, then he give you 5.9. Good video mate
@claytonmoore9530
@claytonmoore9530 3 жыл бұрын
I was thinking the same thing 😅
@mikes6844
@mikes6844 4 жыл бұрын
Lash ups are my speciality, it really is that simple to make a single band aerial, the best sort. Great useful vid, thanks for posting and encouraging hams to get out there and do it for themselves at very little cost and learn a lot too👍🏻👍🏻👍🏻73 de M0AZE.
@timg5tm941
@timg5tm941 4 жыл бұрын
Couldn’t agree more Mike. Experimenting with wires is what makes it all fun! 73
@thefamousbelgian
@thefamousbelgian 4 жыл бұрын
Thanks Tim, I shall have a go! Taking my Foundation exam on 26 June and have just bought a Yaesu FT-840, can’t wait to get DXing. Thanks again, Marc
@timg5tm941
@timg5tm941 4 жыл бұрын
Brilliant Marc! Good luck and enjoy the bands! 73
@donalfinn4205
@donalfinn4205 3 жыл бұрын
Simple simple simple! What it’s all about and we’ll explained.👍☘️
@leeclift4666
@leeclift4666 4 жыл бұрын
Cheers getting back on the air soon nice and straight forward. Thank you Lee M3NVO
@timg5tm941
@timg5tm941 4 жыл бұрын
Good luck with getting back on air. Hope to work you someday 73
@NICKGAR7
@NICKGAR7 4 жыл бұрын
Good video Tim. One of my fave antennas. I think I have a few shown on my basic YT channel too. I have messed about with balanced feeding too for multiband. Another cheap end insulator is a plastic dolly peg (you can cut them up and make a few) - they don’t appear to soften in a microwave so appear to be decent for HF. Cheers
@timg5tm941
@timg5tm941 4 жыл бұрын
Dolly pegs... one for my list. Cheers Nick hope all is well 73
@ClaudeJollet
@ClaudeJollet 4 жыл бұрын
A very simple and reasonably effective antenna, very well explained, as usual. Good job. 73 de VE2DPE Claude
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks Claude it’s great to have you watch and comment. Hope all is well. 73
@M7BCN
@M7BCN 3 жыл бұрын
Brilliant Tim, I’m definitely making this and taking it away on holiday. I’ll be close to the sea at Primrose Valley, May 31st. I’ll update you on my progress. 73 M7BCN
@timg5tm941
@timg5tm941 3 жыл бұрын
Fabulous hope it works well
@Dednny
@Dednny 2 жыл бұрын
Thank you Tim, I enjoy all your videos
@timg5tm941
@timg5tm941 2 жыл бұрын
You are very welcome Denny and thank you.
@Chriswilliams-lx9mx
@Chriswilliams-lx9mx 3 жыл бұрын
Been watching your vids for a while now as an Mw3 license holder your info is invaluable going to get some wire up shortly not sure what as yet mind 👍
@timg5tm941
@timg5tm941 3 жыл бұрын
Fabulous! Enjoy!
@OnTheMicwithMike
@OnTheMicwithMike 4 жыл бұрын
Fan....bloomin'......tastic! Excellent little project to do and looks like some great results. Thoroughly enjoyed! 73' and stay safe mate.
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks buddy hope you are all good 73
@MikeM0XMX
@MikeM0XMX 4 жыл бұрын
Really good video. So good I even watched it twice!
@timg5tm941
@timg5tm941 4 жыл бұрын
Glutton for punishment!! 73
@johnmiskimmin6840
@johnmiskimmin6840 3 жыл бұрын
Great video Tim. It really helped me get it into my head the way it works. 2I0FIP
@timg5tm941
@timg5tm941 3 жыл бұрын
Thank you John I’m glad it helped you 73
@allyonutube
@allyonutube 3 жыл бұрын
Thank you 👍 I’ve made many wire dipole antennas but no vertical antennas. Must give your design a try 👍
@timg5tm941
@timg5tm941 3 жыл бұрын
Go for it!
@driverfilmsshortwavechannel
@driverfilmsshortwavechannel 4 жыл бұрын
I'll give this a go next month, thanks for sharing!
@timg5tm941
@timg5tm941 4 жыл бұрын
Good man.. let us know how you get on Dom. 73
@codybooth
@codybooth Жыл бұрын
Your videos are always helpful! Thanks and 73 from KI5UXE
@timg5tm941
@timg5tm941 Жыл бұрын
Thank you!
@iainmeteorscan1555
@iainmeteorscan1555 3 жыл бұрын
@Tim G5TM: Hi Tim. Just one small point: @ 7:34 “How do we calculate how much wire we need?” The 234 imperial formula includes a 0.95% velocity factor, whilst the 75 metric formula figure you quoted does not. The correct metric formula, including the 0.95% velocity factor, should be 71.25 / f. To advise others who might read my posting, in my own antenna construction experience I have found the 0.95% velocity factor is only a nominal figure, and in real life have always found the velocity factor to be lower - even as low as 0.87% or 0.88%. A combination of various factors affects the velocity factor, such as (i) thickness of antenna wire, (ii) whether or not the wire is insulated, (iii) type of ground beneath the antenna and (iv) height of antenna above ground. In all cases, I have always found that using either formula (both with the built-in 0.95% velocity factor) has resulted in antenna legs that are longer than required, so the legs can easily be shortened to the correct length. Excellent advice from Tim, guys - if you are into serious antenna-building, get yourself an antenna analyser. Far better to spend your money there than on an ATU (which should, of course, really be called an Impedance Matching Device (IMD), which is all it does - it matches the impedance of the antenna to the 50 Ohm impedance of the radio). An ATU does NOT tune an antenna! The biggest "con" in Ham Radio! I hope this helps any newbies, and welcome to them to the hobby. Iain.
@PrimulaCarniolica
@PrimulaCarniolica 4 жыл бұрын
Nice job & explanation Tim! TNX. In mountain area each mass in "gram" matters...special in winter time (portable). Have to try out before snow over knees....:-)
@timg5tm941
@timg5tm941 4 жыл бұрын
Nice one! I agree weight matters Eden portable. 73
@andywilliams1826
@andywilliams1826 4 жыл бұрын
Tim , you keep putting out great videos. Thanks 73 ! VE1EPB
@timg5tm941
@timg5tm941 4 жыл бұрын
Andy that’s very kind! 73 and thank you for watching and stopping by.
@widdy4
@widdy4 4 жыл бұрын
Explained extremely well, first time watching your channel, thanks for the info de 2E0SQA
@timg5tm941
@timg5tm941 4 жыл бұрын
Thank you for the feedback and for watching! 73
@davidvelen9835
@davidvelen9835 3 жыл бұрын
Thanks Tim, going to give this a try looks like a great home made antenna. 73 David W5DPV
@timg5tm941
@timg5tm941 3 жыл бұрын
Hope you enjoy! 73
@drankurbaruah
@drankurbaruah 2 жыл бұрын
Thanks a lot! Noob HAM here from 🇮🇳!! 73 de VU2EHC
@rogerbirchall9037
@rogerbirchall9037 Жыл бұрын
Thanks Tim. I built this antenna ,first trip copied R7 , VE, YB , and several Europeans , I was really pleased with it. I would be interested if you could research Ground Tuning Unit for 1/4 wave antennas . Many thanks, Roger G3KMV
@timg5tm941
@timg5tm941 Жыл бұрын
Glad it worked well Roger… check out Dave G4AKC who goes bicycle mobile with a 1/4 wave and GTU next to the sea and works DX every time
@thingswedo461
@thingswedo461 3 жыл бұрын
Tim, I'm looking at a very similar design. You should give this a try with the ends of the radials at 82cm above the ground and the feed point at 3m above the ground. That's where it seems to model for best performance. Take care.
@timg5tm941
@timg5tm941 3 жыл бұрын
Thanks I’ll check that out
@barriemorgan8042
@barriemorgan8042 3 жыл бұрын
Fantastic video tim think ill have a go at this one thanks MW7BOI 73,s
@timg5tm941
@timg5tm941 3 жыл бұрын
Nice one go for it 73
@barriemorgan8042
@barriemorgan8042 3 жыл бұрын
Hi tim well i finally got round to building this antenna swr coming in at 3 which wire do i trim the vertical or radials
@dheller777
@dheller777 4 жыл бұрын
Thanks for sharing. I have the DX Commander all band vertical. I find that the swr is high on all bands with 10 meters being unusable even with an external tuner. I like your set up.
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks for the comment. 73
@TheLjh73
@TheLjh73 Ай бұрын
So, just out of curiosity, what frequency did you cut for? And what length did you make the radials? Where they the same length as your antenna? Thank you in advance
@Ei2iP
@Ei2iP 4 жыл бұрын
Nice job Tim, pity the bands are not in good shape, although 10/6M are workable
@timg5tm941
@timg5tm941 4 жыл бұрын
Yes at least thats something! 73
@peterfield9260
@peterfield9260 11 ай бұрын
Tim thanks for the video, very informative, I'd like to give it a try. What do you use for poles? I'd like a permanent solution, I'm not intending to make it portable. Thanks Peter
@timg5tm941
@timg5tm941 9 ай бұрын
As a semi permanent solution at home I use a cheap 10m fibreglass pole but with each section stuck together with araldite. Four years so far and no issues
@Andy2e0ree
@Andy2e0ree 4 жыл бұрын
Works well. Tim great job bud 73
@timg5tm941
@timg5tm941 4 жыл бұрын
Cheers Andy, appreciate you stopping by mate 73
@sarahrob342
@sarahrob342 3 жыл бұрын
Hi Tim, I have built your 2M EFHW from another video (and it works brilliantly thanks) so I’m going to give this one a go as well Question before I start though, you’ve tied off the radials at what looks like fence/shed height, so is there an optimum height for the ‘inverted v’ created by those 2 radials? Or maybe an optimum angle? Many thanks, Rob 73 M7ASU
@timg5tm941
@timg5tm941 3 жыл бұрын
You should try and have each radial around a 45 degree angle from the feedpoint. Try and keep their ends above head height (high voltages) then good to go!
@sarahrob342
@sarahrob342 3 жыл бұрын
Tim G5TM excellent, thanks for the clarification
@johnmcgrath9856
@johnmcgrath9856 4 жыл бұрын
What type and height fiberglass mast are you using? Thanks for the great video. 73 KF6EFG
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi john it’s a 10m fibreglass mast supplied by DXCommander. Thank you very much for stopping by and leaving a comment. 73
@ceej100
@ceej100 4 жыл бұрын
Great Video Tim. Are the two radials the same length as the vertical?
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks! Yes they are. Although many make these with the radials 5% longer. It doesn’t really seem to matter either way. 73
@SureshKumar-nk2ok
@SureshKumar-nk2ok 3 жыл бұрын
thank u so much sir from india. the length of green wire is 5.28m and the angled grey wire is 2.6m each correct sir
@camhaines
@camhaines 2 жыл бұрын
Great video! What mast are you using in this video?
@timg5tm941
@timg5tm941 2 жыл бұрын
Fibreglass telescopic pole
@peterjones6357
@peterjones6357 Жыл бұрын
Thanks Tim. Can I ask where your poles are from? Thanks. Peter M0LMG
@timg5tm941
@timg5tm941 Жыл бұрын
Three main sources for 7 or 10m poles: sotabeams; DX Commander or eBay I’ve used all three.
@BikerBytes
@BikerBytes 4 жыл бұрын
Good one mate. I’ll try this for 15m.
@timg5tm941
@timg5tm941 4 жыл бұрын
Worth a go!
@bhenry5091
@bhenry5091 2 жыл бұрын
Just one late question here, Tim. Are you making your radials the same length as your element? Thx for the video. Just what I was looking for. Brent VA7HUM
@timg5tm941
@timg5tm941 2 жыл бұрын
Hi Brent - for the elevated radials the same length should be ok - they worked ok here. 73
@PatAutrey
@PatAutrey 3 жыл бұрын
I’m hoping to create a 2 m Multi element vertical dipole To use as a base station antenna at home I would like for all of the elements to be in phase so that they all radiate at the same time I just don’t know how to create the wiring harness to attach it all to get it to work correctly Any recommendations or advice would be greatly appreciated
@timg5tm941
@timg5tm941 3 жыл бұрын
I am unsure on that one - maybe someone else can chip in with some advice here..
@IrishHamRadio
@IrishHamRadio 2 жыл бұрын
Nice one Tim… I’m gonna try this out next as I’m always exploring different ways to make portable lightweight antennas for SOTA. Have you tried this with the feed point and radials down nearer the ground?
@timg5tm941
@timg5tm941 2 жыл бұрын
Yes it’ll work as long as the feedpoint is at least say 4-5 feet above ground. Keep the radials off the ground. The flatter they run to the feedpoint the higher the impedance so the swr may climb away from a 1:1 match but still should present a good swr. 73
@IrishHamRadio
@IrishHamRadio 2 жыл бұрын
@@timg5tm941 Thanks Tim, I’ll keep that in mind and give it a go.
@francoguanziroli7867
@francoguanziroli7867 4 жыл бұрын
Hi Tim! Thanks for sharing your experience. I build a lot of vertical antenna and i have a question: why balun? Vertical antenna should be already unbalanced. Best 73 de iw2hus, Franco
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Franco. From my perspective it is just to provide a convenient feedpoint for portable use and to help eliminate any stray common mode. Thank you very much for watching and commenting. 73
@puntofisso
@puntofisso 2 жыл бұрын
Tim, thanks, I've just come across this as looking to build my first antenna and this is incredibly useful - I've only used bought antennas thus far, and this is a great first. Out of curiosity, would you think that the same design with appropriate proportions work well for 40m? Although I suppose that the radials length might be a bit prohibitive within your constraints (which are similar to mine).
@timg5tm941
@timg5tm941 2 жыл бұрын
Hi Giuseppe yes you can scale this for any band. For 40m you'll need 22 feet (10m) wires. Use the formula 234/frequency for the length in feet. 71/frequency for length in metres. 73
@puntofisso
@puntofisso 2 жыл бұрын
@@timg5tm941 thanks Tim, will definitely try that, and good shout on the QRP 1:1 balun, it seems a solid piece of equipment for a reasonable price.
@puntofisso
@puntofisso 2 жыл бұрын
Pleased to report that the 20m vertical works a feat! Thanks :)
@mikebohemia1947
@mikebohemia1947 4 жыл бұрын
Thanks
@Crusty_Camper
@Crusty_Camper Жыл бұрын
Would this work if the radials were at 90 degrees to each other rather than 180?
@timg5tm941
@timg5tm941 Жыл бұрын
If you have two radials it would skew the pattern and possibly cause common mode currents
@Crusty_Camper
@Crusty_Camper Жыл бұрын
@@timg5tm941 OK, thank you. I am looking at my possibilities.
@glennfinney1595
@glennfinney1595 3 жыл бұрын
Hello Tim I also have a small back yard would a 40m inverted Vee with manual perform better than 9:1 unun 54’ vertical wire. Trying to also have multiband capabilities? Inverted vee feed 30’
@timg5tm941
@timg5tm941 3 жыл бұрын
If I was a betting man? Yes. At least in my experience
@glennfinney1595
@glennfinney1595 3 жыл бұрын
@@timg5tm941 thanks Tim I’ll be putting up the inverted vee in couple of weeks. Thanks for the insight. Keep making the videos also!
@timg5tm941
@timg5tm941 3 жыл бұрын
@@glennfinney1595 thank you and good luck. 73
@martindrury9740
@martindrury9740 4 жыл бұрын
Hi Tim. Have you done any vids on FT-8? I was wondering when setting up what you put in for grid ref?
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Martin FT8 / digital isn’t my thing sorry.
@martindrury9740
@martindrury9740 4 жыл бұрын
@@timg5tm941 No probs. 73
@davidkerr6175
@davidkerr6175 4 жыл бұрын
Just watched this - very useful thanks. Will give it a try. One thing, is your conversion factor for wire length in metres correct at 75/f? One foot = 0.3048 m so 234/f for feet converts to 71.3/f for metres. Just curious!
@iainmeteorscan1555
@iainmeteorscan1555 3 жыл бұрын
@David Kerr: Hi David. I am about to leave a posting for Tim, G5TM, regarding this very topic. The 234 imperial formula includes a 0.95% velocity factor, whilst the 75 metric formula figure Tim has used does not. The correct metric formula, including the 0.95% velocity factor, should be 71.25 / f. However, in both formulae, 0.95% is only a nominal figure, and in real life I have always found the velocity factor to be lower - even as low as 0.87% or 0.88%. A combination of various factors affects the velocity factor, such as (i) thickness of antenna wire, (ii) whether or not the wire is insulated, (iii) type of ground beneath the antenna and (iv) height of antenna above ground. In all cases, I have always found that using either formula (both with the built-in 0.95% velocity factor) has resulted in antenna legs that are longer than required, so the legs can easily be shortened to the correct length. Excellent advice from Tim, guys - if you are into serious antenna-building, get yourself an antenna analyser. Far better to spend your money there than on an ATU (which should, of course really be called an Impedance Matching Device (IMD), which is all it does - it matches the impedance of the antenna to the 50 Ohm impedance of the radio). An ATU does NOT tune an antenna! I hope all this helps, Dave. Iain.
@nrgxpert
@nrgxpert 3 жыл бұрын
@@iainmeteorscan1555 Good reply. I was also going to mention that the velocity factor was applied only to the Imperial measurement and not to the Metric, but you beat me to it. I have an IMD in my rig (IC-7300), so just need to buy an analyzer, then it's antenna building time!
@iainmeteorscan1555
@iainmeteorscan1555 3 жыл бұрын
@@nrgxpert Hi nrg. Good you picked up on it also. Beats me why UK Hams still use the imperial formula - we’ve been metric for over 50 years now! The Yanks obviously still use imperial, as they haven’t discovered metric yet! It also beats me why Hams still talk about their bands in metres (meters in Retardistan) when even the band plans are listed in kHz and MHz! I can’t remember the last time I saw a radio calibrated in metres!. Great you are considering purchasing an antenna analyser - as an ardent antenna builder myself, apart from my radios, it’s the best piece of kit in my armoury! I know you will have fun with your antenna building, as you can see exactly what’s happening as you make adjustments. Iain.
@nrgxpert
@nrgxpert 2 жыл бұрын
@@iainmeteorscan1555 I bought an MFJ- 259D and have built a half dozen POTA and SOTA antennas, plus my EFHW base antenna. It works wonders!
@patcahill7056
@patcahill7056 4 жыл бұрын
Hi, can the anntenna be mounted at ground level or just above with the radials lyeing flat on the ground?
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Pat if the radials are on the ground then they are effectively de tuned. In that case you don’t need a specific length but as many as you can fit on the ground. 73
@vimmeh
@vimmeh 3 жыл бұрын
the 1/4 wave vertical is a magical antenna, i'd be interested to know how you found the noise levels compared to other antennas on the same band. 73 G7KDM
@timg5tm941
@timg5tm941 3 жыл бұрын
Hi Colin about the same as an efhw and about 2 s points more than a centre fed dipole
@vimmeh
@vimmeh 3 жыл бұрын
@@timg5tm941 thanks Tim, that's not bad at all considering the H v V polarity differences and the vertical picking up noise from all directions.
@2e0evm
@2e0evm 4 жыл бұрын
Hi tim good video , but you missed telling us how to work out the length of the radials , please update thanks
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Eddie. The same as the vertical element. Some designs for this antenna state to have the radials 5% longer others do not. I have to say that whenever I’ve made this antenna I’ve kept it equal and it seems to always tune easily and work very well. 73
@2e0evm
@2e0evm 4 жыл бұрын
Tim G5TM thats great , if you did say in the vid i missed it but that clarifies it , good work tim
@timg5tm941
@timg5tm941 4 жыл бұрын
No problem Eddie. Great to have you stop by. 73
@2j4ez
@2j4ez 4 жыл бұрын
Nice well done :-)
@timg5tm941
@timg5tm941 4 жыл бұрын
Cheers Jez 73
@dafyddg1
@dafyddg1 4 жыл бұрын
Nice and practical! At a few points I thought I'd see a GW call :) 73 de Dafydd DJ0MZ
@timg5tm941
@timg5tm941 4 жыл бұрын
Ah yes I’m a Llanelli boy now living in Sussex! 73
@paulsengupta971
@paulsengupta971 4 жыл бұрын
Rhondda boy here, now in Guildford, but actually back in Rhondda at the moment. GW1YJY.
@PeteSnipe
@PeteSnipe 4 жыл бұрын
Tim, Looks like you have neighbours nearby. Whats the EMC situation like with this antenna for you? Pete
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Pete. Only 10m with my 33ft doublet caused tvi with a neighbour. That was at 40 watts or more. We tested all other modes and Hf bands 40-10 with no issues thankfully. I’ve changed the 10m antenna to a vertical and sited it further away from them and no issues. Ah the curse of modern living lol. 73
@Py1axRADIOAMADORISMOSEMSTRESS
@Py1axRADIOAMADORISMOSEMSTRESS 6 ай бұрын
I make one for operater on my eletricvheelschair i make T2LT my vhoque have 7 turns work well 73 PY1AX TONY QRV
@timg5tm941
@timg5tm941 6 ай бұрын
Nice!
@robertwalsh2352
@robertwalsh2352 4 жыл бұрын
Nice simple build and very well explained, how high is the tip of the vertical element from the ground ?
@timg5tm941
@timg5tm941 4 жыл бұрын
Thanks Robert. The Balun in the video was 10 feet off the ground so the top end is 26 ft high. It can go higher of course. 73 and thanks for watching!
@robertwalsh2352
@robertwalsh2352 4 жыл бұрын
@@timg5tm941 If you don't use a balun how is it connected ?
@timg5tm941
@timg5tm941 4 жыл бұрын
Robert Barrie you can simply solder the centre conductor of the coax to the vertical wire and the coax braid to the radials. Or make the same connections using choc block connectors, taking care to waterproof connections 73
@robertwalsh2352
@robertwalsh2352 4 жыл бұрын
@@timg5tm941 Sorry if this sounds dumb but do you split the outer braid and connect to each radial or does the radial become one length with the outer braid connected ?
@timg5tm941
@timg5tm941 4 жыл бұрын
No such thing as a dumb question 👍 Both or all radials will connect to the single piece of braid. That’s why most installations will have this soldered and covered with heat shrink or good quality tape to further waterproof the connection So to recap, in my case it would be both radials connected to the single braid of the coax. Hope this clarifies it?
@bhenry5091
@bhenry5091 4 жыл бұрын
Hi Tim. what length were the radials to start, same 1/4 wave as the element? Thanks, Brent VA7HUM
@timg5tm941
@timg5tm941 4 жыл бұрын
Hey Brent, yes same length although designs often have them 5% longer than the vertical element. Doesn’t seem to matter in the real world either way. 73
@bhenry5091
@bhenry5091 4 жыл бұрын
@@timg5tm941 Thanks.
@silversurfer1790
@silversurfer1790 4 жыл бұрын
Can you use any wire for vertical element?2E0KTX. Kev
@timg5tm941
@timg5tm941 4 жыл бұрын
Yes any wire will do Kevin.,73
@silversurfer1790
@silversurfer1790 4 жыл бұрын
Cheers,clad I saw your video, will carry on watching them👍👍👍👍
@adyg6ad73
@adyg6ad73 4 жыл бұрын
Great job Tim. Any chance you can provide a link to the supplier of the 1:1 choke balun?
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Adrian it’s in the description mate .. hamgoodies.co.uk 73
@adyg6ad73
@adyg6ad73 4 жыл бұрын
Tim G5TM cheers. Watching you on my phone without my glasses on lol
@timg5tm941
@timg5tm941 4 жыл бұрын
Ha! Without mine I’d never find the phone!!73
@Ploggy.
@Ploggy. 4 жыл бұрын
👍
@agustiana1247
@agustiana1247 4 жыл бұрын
Good..mr..?
@paultolon4370
@paultolon4370 Жыл бұрын
is the length of the radials the same as the element? I plan on using 4. Thanks
@timg5tm941
@timg5tm941 Жыл бұрын
Yes all radials and vertical element are the same. You can prune the vertical element to adjust swr if needed. 4 radials is fine. 73
@DeShark88
@DeShark88 2 жыл бұрын
Golf Five Tango Mike Thank you, repeat your call sign Golf Five Tango Mike And the last digit again? Mike, Tango Mike. Mike, Mexico, Tokyo Mexico One more time? MIKE! MEXICO! TANGO MIKE MIKE MIKE! MEXICO, MIKE, TOKYO MEXICO! MMMMMMMM Thank you Golf Five Tango Mike, you're 59! 😂😂😂
@timg5tm941
@timg5tm941 2 жыл бұрын
Yep! Lol
@DeShark88
@DeShark88 2 жыл бұрын
@@timg5tm941 haha great video by the way! Thanks for your contribution!
@timg5tm941
@timg5tm941 2 жыл бұрын
@@DeShark88 my pleasure, thank you for stopping by and saying hello.
@paulsengupta971
@paulsengupta971 4 жыл бұрын
Hi, what poles are those? Cheers!
@timg5tm941
@timg5tm941 4 жыл бұрын
Hi Paul. The one I used in this video was a DX Commander fibreglass pole. Thanks for watching 73
@paulsengupta971
@paulsengupta971 4 жыл бұрын
Thanks!
@geekverve
@geekverve 3 жыл бұрын
Has to repeat call 5-times..."59". lol
@robertgibson5798
@robertgibson5798 3 жыл бұрын
Yes but he is only using 10 watts!!!
@silversurfer1790
@silversurfer1790 4 жыл бұрын
Would a 9.1 unun ?
@timg5tm941
@timg5tm941 4 жыл бұрын
They work but need a good earth and either lots of radials or a long counterpoise. Even then they are prone to common mode issues.
@silversurfer1790
@silversurfer1790 4 жыл бұрын
Ok cheers I have a 10 metre pole , got some garden wire with green cover on, gonna give it a try .i got a balun coming .
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