A VERY easy to make, effective antenna for 2 Meters. Very cheap to build and performs really well as a portable antenna.
Пікірлер: 156
@2m0rot4 ай бұрын
Brilliant antennas. I had a 60 mile QSO this evening from my home QTH to a station in Edinburgh.
@timg5tm9414 ай бұрын
Fab stuff!
@ZL1BQDRoly4 жыл бұрын
Make sure you wind the coil section anti-clockwise if you are in the Southern Hemisphere................................................ (kidding)
@timg5tm9414 жыл бұрын
Ha!!!!
@ianxfs4 жыл бұрын
Useful antenna and nice simple first project for someone to start with 👍🏻
@timg5tm9414 жыл бұрын
Agree Ian 73
@OnTheMicwithMike4 жыл бұрын
Excellent as always. I’ll be giving this a go over the weekend for sure :)
@timg5tm9414 жыл бұрын
Thanks mate 73
@nethoncho4 жыл бұрын
I am going to build one of these. Awesome video, thanks for sharing
@timg5tm9414 жыл бұрын
Thanks Ben, good luck with the build and enjoy! 73
@radiojourney35154 жыл бұрын
Thank you Tim, this is very helpful. I am going to attempt to make one and test on my POTA activations with my handheld Anytone 868.
@timg5tm9414 жыл бұрын
Brilliant! Let me know how it performs
@radiojourney35154 жыл бұрын
@@timg5tm941 Will do , probably make a video and upload it to my channel .
@rogerbirchall9037 Жыл бұрын
Made this morning for my Baofeng 4 watt , put on end of 7metre pole , first contact 30 miles. Thanks Tim
@timg5tm941 Жыл бұрын
Brilliant Roger!
@mikesmith51392 жыл бұрын
Hi Tim. Thank you again for this video. I have just made mine this afternoon. I have used RG58 in 20mm PVC conduit for a lightweight, easy to carry and deploy antenna to take out on my mountain bike, into them there hills! I also added a 235mm sleeve dipole, in the centre, made out of aluminium kitchen foil, for 70cms UHF. Thanks again for the inspiration! 73, Mike M0MTJ
@timg5tm9412 жыл бұрын
Fabulous Mike, I hope you enjoy the antenna.
@ROMAN138 Жыл бұрын
Just made this and it works perfectly . Very easy to string up a tree or any other structure. Used a Bnc connector so it attaches to my hand held very easily.Very easy to do.👍🏻👍🏻
@timg5tm941 Жыл бұрын
Brilliant!!
@mike-M0MSN4 жыл бұрын
Nice T2LT Tim, a naked flower pot. :)
@timg5tm9414 жыл бұрын
Indeed Mike! 73
@MuzzleMike Жыл бұрын
I know this is an older video but I have been using an antenna that I made years ago on my front porch. I made it as my first one . No one knows it is there and it works great. I got the idea from a roll-up ladder line antenna I have . That J-pole works but this has the I made it factor in it . Thank you for the video.
@timg5tm941 Жыл бұрын
Great example 👍
@languagetruthandlogic3556 Жыл бұрын
Just discovered your channel, Tim. This lightweight 2metre antenna is exactly what I needed. Great style of explanation, calm, relaxed and to the point. Excellent, thanks for posting, I'm off to watch your other videos. 73, David. M0 NXA
@timg5tm941 Жыл бұрын
Glad it was helpful David - that's very kind of you to stop by 73
@languagetruthandlogic3556 Жыл бұрын
@@timg5tm941 Hi Tim, thanks for replying - can I pick your brains please? I built the 2m half wave exactly to your spec (honest!) but it was resonant on 147.400. I did use RG58 standard - cheapo stuff to make my first one, could this be the reason for the higher resonance than 145.500? I would be grateful for any hints you can give me to reduce the resonance to 145.500 or thereabouts. I used the internal swr meter in the FT818 - could that be an issue also? Thanks and 73.
@timg5tm941 Жыл бұрын
@@languagetruthandlogic3556 hi there. Hmm as long as the velocity factor of your rg58 is the same as mine (0.66); you cut the co-ax lengths to the same amounts and the choke is exactly the same, then you should match my antenna. Something somewhere isn’t correct. However the other reason may well be the radio swr indicator. Can you acquire an swr meter or borrow an analyser that covers 2m maybe? The ft818 swr bar graph can be a little vague. What is your swr at 145.500?
@languagetruthandlogic3556 Жыл бұрын
@@timg5tm941 Hi Tim, many thanks for your reply. The good news is that I built another antenna using different and newer rg58 ( the original was some old spare and very cheap co-ax ) and using a 'proper' swr meter I got an swr of 1.2 on 145.500! Interestingly enough, I also got 1.3 on 433.500 a dual bander? I see what you mean about the swr readings on the 818, after a bit of investigation, I agree it is somewhat vague! perhaps best viewed as an indication only. Into the hills with the antenna next week to test it out. Thanks for your help and 73.
@timg5tm941 Жыл бұрын
@@languagetruthandlogic3556 fabulous!! I hope you make many contacts 73
@adyg6ad734 жыл бұрын
Great video Tim. I have exactly this design with the addition of some 20mm conduit and a tee piece to support the dielectric horizontally for SSB. Also some short 20mm sections with long couplers glued at one end to have a light weight portable mast option.
@timg5tm9414 жыл бұрын
That sounds a great idea Adrian!
@theoldhobbit36404 жыл бұрын
I have never played 2m SSB and having just constructed this antenna, I wondered if you might answer a question? Is it only the dielectric section that is moved horizontally if I wanted to use the 2m SSB on my 817 ? Thanks
@timg5tm9414 жыл бұрын
The Old Hobbit should be the whole antenna above the choke do the dialectric plus the untouched bit above the choke
@mikesmith51392 жыл бұрын
Hi Tim. Thank you for your video. Brilliant description! Cheers, Mike. M0MTJ
@timg5tm9412 жыл бұрын
Thanks Mike 👍
@nikwilliams49274 жыл бұрын
Brilliantly explained as always Tim! I need to bookmark this one for the future, as only halfway through foundation! Its brilliant to find something I think I could actually make! Many thanks. 73's CT-3648 👍
@timg5tm9414 жыл бұрын
Good luck Nik sand if you build it I’m sure you’ll do well with it 73
@markg6jvy1354 жыл бұрын
Nice one Tim it came out well 👍
@timg5tm9414 жыл бұрын
Cheers Mark I can’t wait to try it portable
@theoldhobbit36404 жыл бұрын
Been an M6 for about 4 years and although I have not thought about progressing, I love and specialise in QRP/P. I usually use my own built antennas with either my 857 or 817, but on occasion my PRC 320 clansman. I have never tried 2m portable but this build has inspired me to give it a go. Thank you for the very well presented and easily explained video and instructions. M6KVK
@timg5tm9414 жыл бұрын
Great to hear you are heading out portable. Glad the video has spurred you on. Best of luck with it! 73
@theoldhobbit36404 жыл бұрын
@@timg5tm941 Just finished the build and very impressed. Not a fantastic SWR (1:1.5 to 1:1.3) across the band but very usable. Thank you for sharing.
@timg5tm9414 жыл бұрын
The Old Hobbit that’s great! I hope you enjoy the antenna 73
@michaeljohnlawrence42622 жыл бұрын
Well put together video , I'm going to try this. Mick M6CFX .
@timg5tm9412 жыл бұрын
Go for it Michael 73
@Cardassiaprime4 жыл бұрын
Great T2LT vid Tim. good call on not choosing to actually build it slice by slice, more time to talk about it. Great antenna for quick n easy portable applications. I built one for 11m a few years ago- with a 4ins 5 turn choke for the suburban sprawl and it rocked- never tried it in the clear- could only be better. Ive got an untested 6m one maybe now is the time to have a go with it. Job Well Done. Barnie M7PBX.
@timg5tm9414 жыл бұрын
Thanks Barnie good luck with the 6m version 73
@ianwray64972 жыл бұрын
I made one today (cant really call it building one. its too simple for that). Swr 1.02 to 1 no trimming. Piece of cake and works well.
@richardjfrench Жыл бұрын
Tim - excellent video and just the nudge I needed to make my first antenna. Used on local club net, /p and suspended from a tree limb for some height. Excellent reports. I have antenna appetite now so I'm going to make a 70 cm variant also. M7GET Rich
@timg5tm941 Жыл бұрын
Brilliant!!! Glad you enjoyed!
@donnaphen5032 жыл бұрын
Tim, so glad I happened across your channel. I've been a ham since the mid '70s and not being that technically savvy, I found antennas to be my niche! I, like yourself, enjoy experimenting with antennas, mostly on HF operation, but of course, the basics are the same. I've subsequently subscribed to your channel and looking forward to many more of your vids. 73, Don wb1o, near Boston Ma. Oh, one request if possible - can u please include feet & inches in your measurements, as we hams across the pond still think that way, except for the bands of course! HI HI.
@timg5tm9412 жыл бұрын
Hi Don - thank you for subscribing and your kind comments! Copy the request re: feet as well as metres - consciously trying to do this and (mostly) remembering these days!
@willian.direction67404 жыл бұрын
Thanks Tim I used the one I made last week on SOTA made a qso distance of 68 km my mate was using his hand held and I was using my vx8 hand held.
@timg5tm9414 жыл бұрын
Brilliant stuff. I think you can’t go wrong for 5 pounds/dollars! 73
@chriscollins164 жыл бұрын
Hi Tim. I had a brief qso with you while you were dxing on 2m. Im Chris, G7PVJ from Petworth using the very old Yeasu FT 221. Thanks for the radio report mate and i just subscribed to your channel. 73's bud and hope to catch you on the bands again soon.
@timg5tm9414 жыл бұрын
Brilliant Chris! A pleasure to work you and to have you subscribe 73
@stuart197601914 жыл бұрын
Great video Tim I'm sure youl have lots of people trying this out , as I shall , keep up the good work , m0omt
@timg5tm9414 жыл бұрын
Thanks Stuart! 73
@michaelhowse88933 жыл бұрын
Hi Tim. Great video. You could also use self amalgamating tape to seal the choke if available. 73's Mike G7PTV
@timg5tm9413 жыл бұрын
Yes that’s a great idea Mike. Thank you 73
@G0USL Жыл бұрын
I've been using one of those for years, regularly talking 20+ miles with my 2metre one and over 40miles with my 4metre one. Both indoors at ground level. My 6metre one is on my test tripod awaiting testing. Awesome antennas easily equivalent to mid priced white sticks.
@timg5tm941 Жыл бұрын
Totally agree - light on the pocket as well as on the weight! 73
@oldmanandguitar2 жыл бұрын
Hi, I made this antenna with a 1m feedline., I used a cardboard tube out of tin foil to make the choke. In a doorway in my flat it has swr 1.3- 1.across the 2m band. Outside on a pole I presume it might be better. I trimmed a bit of the top piece to try get it lower but nothing happened. 3 watts from a handheld. Am happy with 1.3-1. it is going to hang outside the window of my flat, fourth story. Thanks Tim, I made this for free as had everything I needed,.
@timg5tm9412 жыл бұрын
Fabulous!!
@dafyddr86783 жыл бұрын
Well that's sorted then :-) cable ordered! Thanks for your advise btw.. D
@timg5tm9413 жыл бұрын
Dafydd R great stuff ... enjoy!
@mw7gwr5804 жыл бұрын
Good this Tim. I may make one.
@timg5tm9414 жыл бұрын
Good luck!
@BoB4jjjjs4 жыл бұрын
Very nice and something you can knock up at anytime if you need two meters and no aerial. Good for throwing up into a tree, shame there is no trees near me! Now there should be a plan for that on 11 & 10 meters somewhere. :-))
@timg5tm9414 жыл бұрын
Thanks Bob. 73
@paulsengupta9714 жыл бұрын
Just scale up the measurements 5x. (5x2m = 10m).
@paulsengupta9714 жыл бұрын
Though the choke doesn't have to be 50cm long! Google "ugly balun" for a choke at HF.
@BoB4jjjjs4 жыл бұрын
@@paulsengupta971 Yep, close enough.
@tristan47774 жыл бұрын
The design is also known as a flower pot antenna. I'm not sure why. There are dual band variants (2m/70m).
@timg5tm9414 жыл бұрын
Yes indeed with the flower pot version contained within pvc piping and with a foil wrapping at the right place to help ensure 70cm is brought into play,
@Cptnbond4 жыл бұрын
Nice, most sailors are concerned about accidentally losing their yachts mast, and with that the mast mounted VHF antenna. It would be an interesting experiment to adjust the lengths to marine VHF i.e 156.000 - 157.425 Mhz, and were marine rescue channel 156.800 MHz is the most important. The idea is to use this antenna in emergency and raise a temporary antenna on a carbon pole. That would be a valuable security addition to every cruising boat. You have the SWR meter, could you do the design for 156.800 MHz and see if you get similar good results, design wise. Thanks ;-)
@timg5tm9414 жыл бұрын
I’ll try and look into that
@paulsengupta9714 жыл бұрын
Multiply the measurements by (145/157).
@M0RSF4 жыл бұрын
Excellent presentation Tim. I'm sure that antenna will appeal to portable ops. Have you checked the SWR on 70cm? There's a fair chance that it might work on that band too. Looking forward to the video when you try out the antenna. 73 Chris M0RSF
@timg5tm9414 жыл бұрын
Might try it ... not sure it catches the third harmonic on this design Chris but you never know. 73 mate
@sarahrob3423 жыл бұрын
Tim, this is great I’m a lockdown M7 so was looking for the sort of project to make this all a little more ‘real’, so thank you I’ve made and used this successfully I’m going for your 1/4 wave vertical with elevated radials for 20M next (I’ve posted a question on that video as well) and it got me thinking ... I’m using my FT818ND portable and want to carry as little as possible as you can imagine ... I was wondering if I could replace the PVC wound choke on this antenna with the Hamgoodies balun used on the 20M 1/4 wave with elevated radials as this would allow me to carry/use a single coax feed to interchange between antennas if I wanted to work 2M and 20M on the same field trip ... if that makes sense? Or would that balun be a little to heavy so far up my 10M fibreglass pole? 73, M7ASU, Rob
@timg5tm9413 жыл бұрын
It would be heavy yes. Also the choking impedance which works ok on 20 with the hamgoodies Balun won’t do the job on 2m. Really glad your build works well and good luck on 20m.. you’ll have fun I’m sure! 73
@sarahrob3423 жыл бұрын
Tim G5TM Understood, thanks for the guidance I’ll leave the 2M as it is (especially as it works so well) and build the 20M as a completely separate entity Thanks and 73 M7ASU
@timg5tm9413 жыл бұрын
Brilliant stuff you’ll have a great time with that antenna on 20
@acestudioscouk-Ace-G0ACE4 жыл бұрын
Well explained and useful, I might well build one for portable use. Please don't feel obliged to reply... I always leave a comment on videos I've enjoyed. I know the work that goes into them and like to show support by posting a comment.
@timg5tm9414 жыл бұрын
Thank you!
@BikerBytes3 жыл бұрын
Hi Tim, this looks great for me as an adventure mototrbike rider - I'm going to try this for 70cm as well. What would you recommend for the coax lengths?
@timg5tm9413 жыл бұрын
Hi, for 70cms.. good question I’ll need to work that out and I’m planning to build one soon. The 2m version continues to work v well for me portable 73
@BikerBytes3 жыл бұрын
@@timg5tm941 good stuff mate 👍 73 VK4FJST
@BikerBytes3 жыл бұрын
@@timg5tm941 just made this antenna and tested it today. Works great and even on 70cms, bonus 👍😁
@timg5tm9413 жыл бұрын
Superb!
@BikerBytes3 жыл бұрын
@@timg5tm941 actually I'm getting better VSWR on 70cm 🤔
@martindrury97404 жыл бұрын
Nice one Tim. Could I use mini8 coax or is RG58 better at 2M. Could I use heat shrink over the choke?
@martindrury97404 жыл бұрын
Would it work in a loft space.
@urbanbushcraft30184 жыл бұрын
Yes it will. He aware though that rg58 is quite lossy at 2m so if in your loft you probably want to use better coax. It will definitely be better than a whip on a handheld
@Korpen_19794 ай бұрын
Nice one, than you very much! Here in Sweden we use the 155 MHz for hunting radio so i wonder what messurements i should use for this? Greetings from Sweden
@timg5tm9414 ай бұрын
Slightly shorter 143/f
@Korpen_19794 ай бұрын
@@timg5tm941 Thank you!
@PatAutrey Жыл бұрын
Hey Tim Happy Friday from Texas I was wondering why the top portion dielectric is longer than the full coax portion and they're not the same size also I was curious if you could confirm what frequency you were basing your measurement on
@timg5tm941 Жыл бұрын
Top portion is longer as it has less shielding so lower Velocity factor than the uncut lower half. From memory the frequency was 145.500
@PatAutrey Жыл бұрын
@@timg5tm941 thanks Tim, I'll run w that. I'm making an excel spreadsheet to adapt the design to other bands
@danjor_droneitsme68744 жыл бұрын
Im going to give this a go Tim but i only have an anytone878 handheld im trying to find a connector to connect something like this antenna,any idea where i might obtain one Great helpfull videos keep it up Tim
@timg5tm9414 жыл бұрын
There should be an adapter you can buy to convert it to accept a pl259 or bnc? Telephone any ham shop and you should be able to get one quite cheap. 73 and enjoy the build.
@danjor_droneitsme68744 жыл бұрын
@@timg5tm941 Thanks tim i will do some asking who has one
@junjundyable3 жыл бұрын
Hi Tim May i know if its possible to use a Ferrite Beads around the coax instead of RF choke made of wound coax as you did? 73's DE DV9HF
@timg5tm9413 жыл бұрын
Probably yes - but I am unclear at the moment as to the dimensions and number/type of ferrites.
@GreekPreparedness2 жыл бұрын
wish me luck...I am about to do this Right Now... I am just reviewing the comments before stripping the coax for. Unfortunately it will take me a while to measure SWR in proper conditions.
@mellinikonАй бұрын
Nice video thanks for sharing it with us, I'd like to build one for 70 centimeters, can you please tell me the formula in order to calculate the length? I am a new ham waiting for my call sign and I can't wait to start!!
@timg5tm94117 күн бұрын
Hi there: metric 143/centre frequency. Imperial: 468/centre frequency. 73
@mellinikon17 күн бұрын
@@timg5tm941 thank you very much. By the way, just got my call sign, SY7EMB. 73
@yuppiecruncher9 ай бұрын
Can you comment on ferrite chokes instead of turns to stop common mode? Seems less bulky but i am brand new to antenna theory
@timg5tm9419 ай бұрын
Work well on HF. Unsure about suitability with this antenna
@TonesElectronics4 жыл бұрын
Cheers Tim. Being a newbie to Amateur Radio (test next month) but very competent in electronics it looks like I have just shelled out 30 quid for what looks like a packaged version of this on 2m. Are well i won’t do that again. So has anyone got the measurements for a 10m band one. And could you have them on the same pole (10m pole) at the same time, obviously only one radio on at a time. Thanks
@timg5tm9414 жыл бұрын
Hi Tony for 10m try the same design but with about 8 feet for the top and 8ft for the bottom. Then the choke I think is 5 turns of rg58 on a 110mm diameter (soil pipe?). Then as much feeder as you want from the choke to the rig. Try it out and see. 73
@paulsengupta9714 жыл бұрын
If you want to research similar chokes for HF, do a net search for "ugly balun".
@TonesElectronics4 жыл бұрын
I’ll give that a go. Was thinking that’s going to tricky attaching that large former to the pole, then the penny dropped to put the fibreglass pole through the middle.
@garyh83154 жыл бұрын
Tim, the choke. I have a fair amount of thick coax. Difficult to make a choke. What else would you use? Cheers Gary (M7)
@timg5tm9414 жыл бұрын
Hi Gary, I would simply use the rg58 if I’m honest with you. 73
@paulsengupta9714 жыл бұрын
If you wanted to use thick coax as the feeder, you could make the antenna out of thinner coax and add in a connector at the bottom of the choke.
@perolsen37994 жыл бұрын
Hi Tim thank you for a very goud video. Can I use the same choke if i build a 4m version. 73 OZ5PO
@timg5tm9414 жыл бұрын
Hi Per. For 4m,6m the suggested choke is wound on a 50mm former rather than 25mm. I will be trying this in the next week or two for both of these bands. 73
@garycook51259 ай бұрын
If you check the SWR on a lower power scale, using a 5 watt radio, what is the reflected?
@timg5tm9419 ай бұрын
Tiny
@peterbriggs34084 жыл бұрын
Would be interesting to see performance compared to a ribbon line Slim Jim.
@timg5tm9414 жыл бұрын
Yes won’t be much in it ... maybe slim Jim by a nose owing to its low angle of radiation?
@paulsengupta9714 жыл бұрын
A slim jim is another end fed half wave (proper end fed!), with a matching stub. Of course the next step to a slim jim is to then make it into a collinear by adding a second half wave (and a phasing section between them)...and even maybe a third....
@martindrury97404 жыл бұрын
Hi Tim. Could you use heat shrink tube to keep the choke tight?
@timg5tm9414 жыл бұрын
Absolutely Martin 👍
@martindrury97404 жыл бұрын
@@timg5tm941 Nice one. 73's M7MGD
@martindrury97403 жыл бұрын
Want to use this as a permanent antenna for outside but could I run my fibreglass pole up the middle of the choke and then water proof using glued heat shrink?
@timg5tm9413 жыл бұрын
Absolutely 👍👍
@martindrury97403 жыл бұрын
@@timg5tm941 many thanks again Tim 73's
@timg5tm9413 жыл бұрын
You’re welcome Martin 73
@BritishBeachcomber2 жыл бұрын
Does anyone have thoughts on how this compares with a Slim Jim or J Pole antenna?
@timg5tm9412 жыл бұрын
Should be pretty close, all are half waves
@g7npl4 жыл бұрын
Hi Tim its a FLOWER POT ANTENNA
@timg5tm9414 жыл бұрын
Hi Christopher yes the flower pot antenna is the same design but with the pvc pipe covering to allow it to be literally stuck in the earth in a flower pot. Hence the name. The version I show is the far more portable friendly version without any necessity to be surrounded by the pipe. Nor is it dual band like the flower pot. 73
@GarryLennox4 жыл бұрын
does the diameter of the pipe make a difference ? could i use 1 inch pipe ??
@peterbriggs34084 жыл бұрын
I doubt if 0.4mm will make much difference :-)
@timg5tm9414 жыл бұрын
25mm which I used is pretty close to an inch so all good
@GarryLennox4 жыл бұрын
@@timg5tm941 sorry I was working at the time and skipped through it . But my question still stands . Does different diameter pipe make a difference , smaller or larger . Thanks
@PatAutrey2 жыл бұрын
Does this also work on 70cm?
@timg5tm9412 жыл бұрын
It has an ok swr .. pattern wise I’m not sure
@jamesgoacher16064 жыл бұрын
I count 11 turns.
@jimreviewsstuff3 ай бұрын
Hello. What diameter is the pipe?
@timg5tm9413 ай бұрын
I think it was 25 or 32mm
@williampd9wac9474 жыл бұрын
Don't believe you Tim, picture i mean ;-)
@timg5tm9414 жыл бұрын
Ha! I can’t draw that well!
@pixeluser175 Жыл бұрын
She tried to paint a CAT interface.
@rttakezo20004 жыл бұрын
I would submit this is a dipole, not an EFHW
@timg5tm9414 жыл бұрын
Interesting point. It is indeed classed as a dipole. Of course being electrically half wave and fed at the end are also key characteristics. 73