ฝัง
- เผยแพร่เมื่อ 29 ก.ย. 2024
- This is the first test of my home made EFHW multiband antenna in the real conditions. I was made an inverted V fashion of this wire antenna in my cottage garden. Antenna was set in very difficult conditions - low elevation and very close to the building so at least we could see how it works also in this difficult situations :) Even the propagations was poor, you can see QRP QSO's I made with XIEGU X5105, 5W and this antenna. QSO's in this videos with OK1DSX/p, YU1ACR/p, DK2UC, DJ2DX - thank you guys for contacts! ;)
I hope you will enjoy this video ;) If you like please don't forget subscribe to my channel ;) Thanks for watching!
73, Paul
#EFHWmultibandAntenna #HomeMade #XieguX5105
![[TH] FS vs BME - VCT Ascension Pacific - Lower Bracket Final](http://i.ytimg.com/vi/wnygqsR2Fig/mqdefault.jpg)
Good Job, Paul. Just one hint: when I build linked EFHW I start with the shortest wire and measure and cut it to resonance plus the linkage. Then I connect the next wire and do the same, and so on. This way it’s much easier to make some corrections if needed.
73 de Rico, DG5BQ
Yes, exactly that's the way how I want to tune this antenna 😃👍
Hi Paul. I watched both part 1 and part 2 of your EFHW videos. They were very helpful; I am going to build my own EFHW antenna and am impressed with how well yours performed. 73.
Thanks Chuck for watching ;) You can made also this antenna without this joints like the base antenna - UnUn only and half wave lenght wire in one piece ;) I wish you luck with build! 73
Paul, I can't help but feel you should start at 10 meters about 28.500 Mhz and resonate the antennna for the lowest SWR there. Then move up band by band to center the resonance in the middle of each band....24.950, 21.300, 18.150, 14.225, 10.115, 7.150, 5.335 and 3.700 Mhz. In that order. I know for your setup using a tuner it may be not that big of deal but it looks like this antenna could really dip in for every band. The thing is just so intriging a design I can't help but think what if you could put some real power to this design. Terry, KI7M
Paul I was was glued to the screen watching this and hoping youd get good results which you did great antenna design and I hope you have just as much success on the other bands with it also
Thank you! :) Yes, not much time left for the other bands and also the propagations was poor, but I hope too that next time it will be even better :) 73
Hi Paul, thank you for the video. I'm using a linked dipole for 6, 10, 12, 15, 17, 20, 30, 40m and I'm very impressed of the results. I would like to try this antenna. But a linked half wave endfed would be better in vertical position because of the best emission at the end of the antenna. So on 40, 60 and 80m in your configuration your emmission would be more to earth than to air. Inverted V is not optimal for end-fed antennas. Perhaps try a high tree or pole for this antenna at least as a sloper . That would be a great antenna. But you need a good mechanim to put it up and down for changing the band :-)
Greetings from Northern Germany
Martin DG4BAD
Yes Martin, I fully agree with you ;) But I didn't had much on choice this day because was too late and the sun was nearly to set. Original plan was go to forest on the hill, but after look on my watch I had to change my plan :) Of course I will try better setup if conditions will be better ;) Thanks for watching and 73! Paul
Nice QSOs at the end there. New ham here, yet to get on the air, so it helps a lot to hear your QSOs
Thank you so much! 😉
Nice job Paul. At such a height and such a good result!!!
Excellent project for winter days :) I will have to try and build my own. Thank you for all the details, impressive job with electronic skills as well as video filming and editing! 73 de 9A3DBX
Pretty good performance given just QRP and how low the antenna is. Just keep it away from KW amps and you'll be ok! 😀 Thanks for posting and 73! de WX0V
Thanks Scott! :) From tree to tree and 100W it should given much better results also :) Thanks for watching! 73
I don't see why you need the plastic connectors. Wouldn't it be easier to tie off each given length directly to the wooden insulator allowing just enough to then connect to the next length using the metal clips that you have. I doing that would decrease bulk, weight, and improve the strength. Nice job. Good videos as always.
Nice job Paul, as usually. Bravo 73 de in3ade Roby
Thank you Roby! :) 73
Fantastic job My friend 73 from kb2uew
Thank you! 😊👍
One thing that concerns me about this that the wooden "isolators" are actually wooden "joinery biscuits." These are used in woodworking and joinery, furnituremaking etc. And they are used inside of slotted joints to glue the wooden joints together, using water based glues. These joinery biscuits are made of compressed wood chips. They are very sensitive to water or moisture. They are definitely not meant to be used outdoors. And no amount of varnish or lacquer, paint or oil will make them waterproof. You need to use something waterproof for this application; ceramic, plastic, glass etc. Definitely not to use these wooden joinery buscuits. They will disintegrate in an outdoors or wet application. Otherwise, thank you for your thorough, concise presentations. No disrespect intended here.
Parabéns pelo seus vídeos.
Seria possível você passar as medidas dos fios para cada banda? E para qual frequência foi calculada essa medida.
Obrigado
73
Alexandre PY2LOC
Alexandre, boa noite. Vá nesse link - th-cam.com/video/qvJy4FC2wJ4/w-d-xo.html - onde o Paul constrói a antena passo a passo e adiante até 6:30. Lá você vai ver a medida de cada banda, individualmente e o comprimento total da menor para a maior. 73 de PR7TU
paul voce pode fazer um video fazendo essa antena com suas medidas .73 carlos
You MUST ground the transformer to a RF GROUND, not just a ground rod.
A ground rod 1 meter long with several wires a few meters long connected to the rod, and laid out like a wagon wheel.
Thanks for details!!!...Great video and the explanation. "73"
This is cool and all, but 80% + of the population cant put this up where they live. Its way too big for most people. This is why most people go with verticals,
like HamSticks. In particular for those that live in urban cities, which most of the population lives. --- Its an awesome video though. 😉👍
I have the Yaesu 991 a and for some reason the adapter cable will not fit my radio not sure why
Is it possible to use the tuner without the adapter cable?
As long as I have a patch cable from the radio's antenna output plugged in to the 939 Y radio input and the antenna plugged in to the 939 Y, can I still use the tuner without using the adapter cable
Hi Paul
Just a year ago, I talk to you about 1:49 and 1:64 Ununs and end fed halv wave antennas. A year ago the information about EFHW was rare, at least for me, off course. Now you has build the Unun and the antenna, and the two videos shows very good performance. As showed, EFHW and the Unun are ease to reproduce.Yours videos are very clear about building the Unun and the antenna at home. Good to note that EFHW is a cheap antenna.
Congratulation, Paul. Thanks for your continuous effort to bring us many technical and pratical news .
May this EFHW antenna be a good station addition for you and for many others interested fellows hams.
73 From Brazil, PP1RD Fernando
I am very pleased of your comment Fernando! I will be happy if this video will help at least to one HAM operator :) Thanks for watching! 73
can you provide any assistance on how to calibrate the mini 1300? just got a new one in the mail and the manual is unclear on what to do
Great one, I like the design. Maybe I see it as a candidate for permanent installation using those boxes on each band step with relays inside. There could be a controller near transceiver with autoswitch based on FRQ of TCVR. That is only my opinion, your realisation is also great and I will probably build something similar for my upcoming G90 from Xiegu, because I fell in love with QRP based on your videos :) 73 DE OM4ADA
Great! Please share your experiences when you made your antenna with relays. Would be very interesting to see that 🙂👍 Good luck! Vďaka za pozretie videa! 😉 73. Paľo
nice job done!
would be useful put traps instead of manual joints.
you made the balun very precisely and also with a big capacitor works excellent
Do you have any information on how to calibrate the mini 1300
I didn't know the traps would make that big a difference. What a good portable antenna you made. 73 KE0OAP
: ) Thank you! :D 73, Paul
Are your wires shown tuned lengths in your chart?
Hey Paul good job on the antenna. Would this antenna work without the brake points and just using a ATU ??
No, I don't like to use an ATU
Excellent results Paul!
By keeping the antenna low to the ground, you will probably see good NVIS characteristics on 80 and perhaps 60 meters (regional coverage up to ~750 km radius).
We used a similar linked antenna in the Swedish military with our Ra195 (PRC-104) and it worked flawlessly. (I'm a former reconnaissance diver or 'Amphibious LRRP' = 'long range reconnaissance patrol').
I also note that you're using a SLR bag for your radio gear. Same here. I often carry my G90 with Raspberry Pi, Android tablet or mini laptop plus LiFePo battery and antenna in an old Lowepro SLR bag. Perfect match and very 'stealthy' ! 😊
Have you explored JS8Call yet? With this low sun activity the weak signal digital modes are really fascinating. I'm often heard both in continental US, South America and the Caribbean and sometimes as far as Antarctica, Australia and South Africa with my G90 on 10-20 W even now in November with low sun activity. Hope to see you there soon! ☺️
Thanks Michael! I heard about JS8Call, but never tested before. Digital is not my favorite mode :) I love SSB, but sometimes I do FT8 when is boring on the empty bands :D 73 and thanks for comment! Paul
@@OM0ET JS8Call is FT8 but with a 'chat layer' added on top. You can actually make TRUE keyboard QSO's with it, not just automated 'click-QSO's' as in FT8 but also do some 'rag chewing' or exchanging valuable information.
I'm researching it (and writing proof-of-concept software) for EMCOMM purposes and it's very promising. 100% copy at snr below -20dB is common.
@@michaelfuchs1467 sounds great! I will try 😃👍
This w6ecb i'v been watching you . Merry xmas to you 73!
Hi Eddie, thank you so much! Happy xmas to you too! 👋😉 73
Good job Paul Good Antenna and Good QRP TX 73 from Brazil PY2DPM - David
Thank you David! 😊 Greetings to Brazil 👋
David tudo certo, não possuo indicativo ainda tenho somente um sdr e gostaria de saber se vale a pena montar esta antena para escutar todos as bancadas? 73.
Hi Paul, I'm glad to see your build of the EFHW 80-10 antenna and this your last test of them. So, I'd like to know if you did some kind of tests about a new lenghts of entire wire, because what I saw was the wires were few long then the ressonance's QRG. So, if is possible short them to mach the point of your parts (80m, 60m, 40, 30m etc... sessions), it seems a good idea to fix it to close to 1:1 SWR on each band. Whats up? Furthermore, I wish you congrats for your class and receive my best 73 from PR7TU.
On time: EFWH are great Jokers to field days and so ones... NICE ANTENNA!
Excellent video Paul. I watched this one and the building video.👍
Nice to chat with you on your live stream Paul. I had a look on your website, I didn't realise you sold those loop antennas, very impressive. I like the quality of your workmanship!
You speak 3 languages too, very cool. Hope to QSO some day.✌️
73 de VK1DON
Very interesting Video👍
hi PAUL... thanks for another awesome video...is the proximity to the ground, inconvenient for the adjustment ? especially for high bands like 20m ?? if the cable was higher above ground, would this change the adjustment or not ? and what about the performance at this height ,, thanks..
Pekne vysvetlené.
Mám zopár drobných pripomienok:
- namiesto čokoládok by som použil zdrhovačky, jednak sú menšie a skrutky na čokoládkach môžu poškodiť izoláciu na anténe,
- faston konektory dať potom po naladení aj s krytkami, nech do toho tak neprší,
- neviem, koľko vydržia namáhanie v ťahu tie drevené elipsy na biscuitové spoje - čas ukáže.
73
OM0ET thank you, when i watched this video then i understood and made my wire antenna. :0)
what happens to your antenna, if you need a biscuit? I like the idea of having it cut exactly for each band. it looks easy to connect / disconnect bands as needed 👍
nice video ! no counterpoise required ?
Thanks. No, it's a half-wave dipole actually but feeded from the end and not center.
The wire length is very sensitive to resonent frequencies. I think your connector sections play important role in SWR at frequencies you want.
I just ordered one from my antennas....but i dont think it has the loops for each band?
Just got my General Ham license and have a HF rig, Kenwood TS-430S, and now need an antenna. My transceiver puts out 100 watts; will this antenna handle 100 watts? It sure sounds good on Xeigu radio. I cannot believe you talked to Serbia and Germanyt on just 5 watts. If you can do that on 5 watts I can talk anywhere with 100 watts. Thanks for posting. 73 from K9POW in eastern Tennessee.
Thanks! 😊 Yes of course that this antenna can handle 100W maybe even more. I don't have portable transceiver with more power than 10W. 😁 This antenna is very easy to made. I wish you good luck with your own project! 👋 73
Good stuff ! I'm going to build it ! I'm thinking of detachable sections ? Love it man ! What do you think it weighs ?
Thanks! I don't know the weight but it depends on the wire thickness and lenght you want to use 🙂
Hello Paul, superb testing despite the bad conditions. I searched in my studio. I found the same kind of antenna but military. with the earth in spider's web. I will test it starting from your idea. that could be nice. Sorry for my English but it is not very good. 73 from ON4LBF
Thanks for watching Albert :) I wish you good luck with your antenna!
Good idea about isolating wire sections. Will incorporate your methods during further tests/development of my EFHW.
Good work on your part......
73 OM . .
Great! You can share your experiences when finish your antenna ;)
Hello Paul, this is a hell of an Antenna you built there. Hope to talk to you soon on this Masterpiece. Great job done, respect. 73's de Günter
Hey Gunter! 😁 Thanks for the nice comment! I hope to meet you too on the air 😉👍 73, Paul.
Good job Paul. I hope to hear you on the higher HF bands again soon. 73 de Ady G6AD
Yeah for sure! 😉👍 Thank you Ady for QSO! 73
The force is strong with this one.
Well done, thank you, from 4X1PD - 73!
Thank you! 😉
Hi, Brother really excellent video. its enrich my self. watched 2 videos and pleased. hope will make.
can you please guide 49:1 wire thickness is needed for 100 Watt. 73 S21ED
Thanks Again
Thanks! You can use 1 or 2mm enameled copper wire and one toroid. For more power two stacked toroids :) 73
@@OM0ET OK SIR
Excellent, I watched both videos and I was so pleased with your results 73 G1YYU
Thank you for watching both videos! 😉👍
👍
This video has inspired me to make one like yours. Thank you so much👍
I am glad that this video fulfilled its purpose! 😉
Hello I'm new I don't have a call sign yet, and I don't understand much of English. I have a rtlsdr v3 and I would like to know if with this antenna I found it fantastic I can hear all the radio bands? Or recommend me another?
Yes of course you can use it for listening. You can listen whole SW on it with no problems ;) Paul
@@OM0ET Thanks Paul
What _is_ that QRM? Woodpecker implies pulsed radar, but as far as I know *the* woodpecker isn't in use anymore.
Here it A LOT here near China
Sounds like HAARP or similar?
Similar to something I'm playing with ATM. Neat links and interesting video. Too many ads for the length of video.
Thank you for the nice comment and watching this video! I am sorry for the ads but they are added automatically by Google. 🙂 73! Paul
@@OM0ET I never get ads - using MS Edge + adblocker - heaven -
What wire are you using?
It's flexible 1,5mm copper wire PVC covered
Great Job on the Antenna. Very nice.
Thank you! ;)
I like your videos. Thankyou from vietnam.
Wow! Nice. Thank you! I would like to make QSO with Vietnam... I wish for better DX propagations ;) 73, Paul
@@OM0ET Oh. I'm beginner, I don't have HF station. I using VHF & UHF only. You can contact with my friend. His callsign is XV2M. FT8 mode on 20m band.
See you later on HF wave !
73, Minh
@@binhminh5304 no problem Minh, we will meet maybe later 😉👍 Good luck and 73!
very good "healty" job, Paul!
Yeah it is "healthy" as you said :) Run there, run back ... :) Thanks for watching! 73
Nice antenna
Thank you! 😊
Good gob
Thank you! 😊
Looks great :). Looking forward for part 3 :)
hihi :D I hope that next time also with higher power and better installation :) 73
@@OM0ET I am looking forward :). Ever though about remote controlled "spliting"? I saw an approach once but i forgot the link :/.
@@pulponair yeah theoretically it shouldn't be a big problem - remote control
@@OM0ET I would love to see you building that :).
Nazdar Paly. Trimem palce.
Serus! Aj ty tu? :) Ta dik! :)
Hi Paul, Do you connect each segment from 6M > 80 M and tune up to which ever frequency you wish to rx or Tx on ?
How high do you need to have the 80 M end from ground ?
Cheerz Stuart VK3FSGA Australia.
Amtenna should be at least half wavelenght of the longest working band. Ideally. But in reality and portable max.how is possible.