Very nice video Mr Tim. I home brew an End Feed antenna to 11 meters, with an old toroide picked up from an old TV. I make a 9/1 Balun with 12 meters tuned all bands except 20 and 11 meters. So put another wire with 5 meter cut off some pieces and with 4,40 an alf wave antenna tuned from 26MHz to 30 MHz with very very good results on 11 meters. So now I understand the working antenna with one lobe. 7351.
Another informative video Tim and spot on with what you say. I have been using both types you describe and the EFHW is now my antenna of choice. The beauty of the end fed is i can get it out into the garden away from the house and away from any electrical noise. Add in a decent line isolator on the feed before the coax enters the shack and bob's your uncle. The LC network is very efficient and will not heat up like a toroid will and thats where some loss can come in. I have come to the conclusion that i will not have the real estate to have an antenna for every band so pick your favourite and get an efficient antenna for that band and make contacts.
Nice video Tim 👍. I use a multi band EFHW for 40,20,15 & 10. I have it in a inverted L configuration with a slight dogleg to get it to fit in my small garden.& and I must say it works very well.
73 Tim, I also think it's best to use a band antenna but unfortunately we don't all have a very large garden. For the sake of discretion also HI. Superb video see you soon
Could you not have 2 end fed monoband wires attached to the same feed point put separated as they go down the garden so like a fan dipole, but an end fed version? This would do away with the need for an antenna switch and wouldn't be too difficult to fit in to a small garden.
Sadly not Nick, owing to the high impedance at the feed-point. However, a half-wave at the lowest frequency, fed with a 49:1 will provide a good match on the remaining harmonics - hence a half wave for 40 is good on 20 15 10 etc.
Another good video Tim. It is funny this popped up on my feed, as I spent some of today installing my own EFHW, a half wave for 80m. I heard your QSO with MW0YVK but lost you in QSB. I've yet to fit the feeder in to the shack, but its promising!
Hi Tim. For Shortwave listening only the length of wire doesn’t really matter too much. If you can fit a decent sized wire about 50 feet or more it’ll allow you to hear lots on HF and down to MW and LW. 73
Backing up the theory Tim, I have a 124 feet (37.8 meter) end fed and confirm it works well on 80m, ok on 40m and it is dummy load on the higher bands.
Issues. 1. A wire which is a half wave long in free space does not resonate on its harmonics. If you have a horizontal 66ft long wire say 20ft high in the garden, then the harmonics are way off. Moreover it won't resonate on 40 metres either. (7.1MHz resonant wire will also be resonant round about 15MHz, 23MHz and 32MHz depending on particular circumstances). 2. The input impedance varies on each frequency from around 1800ohms to 3200ohms. So a 49:1 is pitched in the middle. From memory the first harmonic is around 2500ohm. 3. The EFHW is a high impedance antenna and is rarely implemented properly. It's a dog for common mode issues, which is one reason why so many people report it as being 'noisy'. It's not the antenna thats noisy, but its implementation. 4. The 49:1 transformer has a narrow bandwidth in relation to the 80-10m bandwidth boasted, moreover, the transformer expects the wire to be resonant at the operating frequency and it pretty much never is. Consequence is, I've ditched the multiband EFHW its a mess of compromises that are exceptionally time consuming to sort. The good SWR readings are largely down to system losses. Basically, the antenna is lossy on the low bands and inefficient on the higher bands. So, monoband EFHW. I've designed and built a 20m halfwave vertical from scratch, using four short (520mm) radials. I built a purpose designed resonant tank type matcher and it is better than 1.2:1 right across the band, and the return loss is better than 30dB at 14.2MHz. It is 3 S points better than the multiband 66ft wire on 20metres. However, this antenna is not without common mode issues. This is clear from the EZNEC modelling. I've built an RF ammeter so I can measure the real life cm current, but need to do the test measurement. Basically, short radials do not decouple the antenna from its feedline. If we look at commercial installs (ie broadcast) of the vertical halfwave, then they use halfwave radials and a lot of them. Bit ironic, because I started down the vertical halfwave journey because of the short radial / "no counterpoise" meme. Turns out its another myth. There are better antennas and antennas properly designed for specific bands will always outgun multiband compromises like the "EFHW". So after three years of sweating the detail on this stuff, then my small garden antenna is going to be a horizontal wire, centre fed and resonant on 7.1MHz. It will be as high as I can possibly get, probably 10/11 metres. The I will introduce some 'fan' elements for 20 and 10 metres and bring those to resonance. Capacity hats on the 66ft wire will tune the 40m element for 15m. This lot will be fed with 8 metres of open wire feeder to a remote tuner so I can impedance match the WARC bands, otherwise it would not need a tuner and I could use coax all the way. For 160m, 80 and 60, I'll short the base of the feeder to create a top loaded vertical and have a remote tuner to sort out the impedance matching. This approach addresses the point that below 40 metres in real world conditions, verticals outgun horizontal wires. Until I've done the design, build, measure I can't know this is the best antenna I can install, but its my best shot at the minute.
What this video leaves out is that with an end fed half wave there are very advantageous gain lobes on the harmonic frequencies that are at low angles when mounted in an inverted V configuration. Something that you just cant get with a center fed dipole. Ive worked from Russia in one direction to Japan in the other using these lobes.
Question? Should the counterpoise run back under the antenna in the same plane (in line with the antenna above) or does it matter as long as it is laid out ?
I measured the input impedance at 7 MHz of a 20 m EFHW, and it was insensitive to the positioning of the counterpoise, which was 2 m long in my case. The counterpoise is just coupling into ground so I wouldn't expect it to affect the radiation pattern significantly (G1JVG).
The choice of configuration (horizontal or vertical) doesn’t affect efficiency as long as for example, the antenna isn’t too low and then ground losses play their part. Otherwise it’s my suspicion that the mono bander, being narrower in swr 2:1 bandwidth would be nearer a dipole in performance on the full and wavelength frequency than the broader banded 49:1 multiband. I wish I had enough room to run both off WSPR to gain a full scientific perspective. 73
Totally different polarisation & radiation patterns from horizontal & vertical so very different depends what your looking to do as to what you use it for. Mr 2e0ftx
Question please: How is the directional (end vs. length) radiation pattern on the EFHWA? I'm new to HF and am planning my EFHWA install. Here in the US, should I run the element north south to contact Europe /Asia & east west for Canada / South America? Or does this consideration make that much difference? Ideally, I'd like to contact all directions... any ideas welcome. Ken - K0CCT
If horizontal then running the antenna N/S would give broadside gain to E/W and vice versa. Any vertical aspect of the antenna would be largely omni-directional. Inverted L for example gives a bit of both.
Tim I'm using a MEF-330-1K transformer with a 66' 12g wire up/over a 45' tree in a sloper configuration pointed northwest/southeast direction. Will this work have directivity on the 10m band in those direction's and what kind of gain would it have?
Difficult to calculate gain but the directivity is slightly biased towards the lower side of the antenna. So if it’s fed low and slopes at an angle upwards, the direction favoured is back towards the direction of the feedpoint. At 66 feet there will be some pattern break up and as much of the antenna will be over a halfwave in height for 10m the lobes and nulls May be pronounced. It’ll work though 73
@@timg5tm941 Thank you I will be putting up my 66' 12g wire shortly hopefully I will be able to have some qso's in both directions. II might be able to move the front wire more south easterly to direct my signal. Please do more videos on the end fed half wave wire antenna on radiation patterns in the near future. Thanks Stay safe during the covid-19 pandemic. 73 PS My MEF-330-1K transformer is up 10' off the ground which just might help with forward directivity in the wire south easterly direction.
Once the pattern breaks up in the higher frequencies it becomes a little more of a lottery. If the station you’d like to work is in the direction of a lobe that’s great. If they are in the direction of a null that’s when you may struggle. It’s the same with large doublets on higher bands too. 73
Interesting video. If you put the endfed up as an L antenna (no «nulls» in a vertical segment) and focus on the gain of several halfwaves on 20-6m (40m version) it might still be a better solution than a nest of singelbanders who also interact 😉
yes, I added an 80-meter coil, once I trimmed the wire I got the SWR 1.1in the SSB voice section. it works very well far better than the G5RV half size with 80-meter coils fitted.
Hi Tim, ive just ordered an LWHW end fed 20m long antenna,it comes with a 9:1 unun from moonraker. Ive done zero HF before so is this the right ant to start with? The antenna is advertised for 80-6m. Your thoughts greatly appreciated. Will i need an antenna tuner? Thanks.
Hiya welcome to Hf! It’ll work .. I’d run a 17 foot counterpoise from the ground lug on the unun if you are mounting the box near the ground level. This will take some of the return rf current away from your coax outer shield and hopefully stop rf in the shack. You will need a tuner .. on some bands you can use the internal tuner in your rig (if it has one) as swr may well be within 3-3.5:1. On other bands it won’t be so you’ll need an external atu. My only slight concern is that at 20m long it will be a Halfwave on 40m and a tuner may find it tough to match that owing to the high impedance levels but hey put her up and see how she goes! Good luck 73
paulkazjack there’s loads out there. If your budget is around 200 pounds then take a look at the LDG range of auto tuners. Might be a good place to start.
@@timg5tm941 I've only got a 45ft by 45ft garden but have a 140ft end fed and works really well at a height of around 20ft,any higher the swr goes mad.
I use a multi-band end fed half wave antenna configured as a sloper at my qth. For portable work I prefer a mono-band end fed half wave antenna. Since I work portable during the day, my choice is an antenna for the 20 meter band. I use a commercial antenna from the German company www.lambdahalbe.de that has and adjustable window line stub instead of a matchbox. 10 meter radiating element, 4 meter stub. It is easy to adjust the SWR for various situations. Also, it is much lighter than carrying an extra match box. Sometimes I hang it from a spiderbeam 12 meter telescope pole (fits vertically very well) or hang it from a tree. I try to avoid trees because the seem to want to keep my wires and not give them back. End fed antennas are relatively cheap to buy and cheaper to make. For my situation they are an ideal solution. 73! SV0SGS
My multi-band antenna is ia 5-band antenna, 23 meters long. 10, 15, 20, 40 and 80 meters (80 meters electrically shortened) from the dutch company www.hyendfed.nl. I have it configured as a sloper. An inverted "L" or inverted "V" configuraton is also an option . A mono-band antenna for 20 meters (or for 10 and 15 meters) can be configured vertically for small gardens. An advantage to both antennas is that no tuner is necessary. 73! SV0SGS
Frank, i have the very same antenna and i am always surprised just how well it performs on 80m. Yes it is a compromise on 80 but as signals are generally strong on 80 at night you can't really tell the difference.
A 40 m antenna it’s not exactly 1/2 of an 80 m antenna as people would think Same for a 20 m not exactly have a 40 m and so forth. It makes it simple to call them 80, 40 and 20 etc. because you’re close to that but not exactly in the very center. For NVIS you cannot beat the voice part of the 80m band that some call the 75m at night time. So I have a mono band 75 meter half wave end fed resonant antenna attached to a 49 to 1 unan sloaping from 20 feet up from my second story office to 35 feet up with the far end in a tree and I can hear and speak to anyone outside my door to 400 miles away. if they sneeze I wipe my nose is that good. The kind Elmer who was helping me put this up tried to convince me not to make it a resonant so I could with the unan and an antenna analyzer talk on other bands. He tried his best to get me to do this. But you will lose clarity on the 75m if you do that. And all I was interested in the 75m. It was a big argument and finally he acquiesced and helped me put up a resonant 75m resonant 14 guage wire NVIS antenna. To me it was like that mystical unicorn that you could not really find. But after putting this antenna up it was like a miracle. I found everybody else around that had NVIS Antennas and towards the evening the band comes alive and I can talk to everybody and they can talk to me it is like a miracle. And I’m really happy with it since I am with amateur radio emergency services. This appears to me to be tons better than anything else I’m trying to communicate with other people outside if I’m in a disaster area. Because you can talk to anybody from right next door up to 400 hundred miles away and sound clearer than your only cell phone. And if the person you’re talking to also has an NVIS antenna they do not have to rely on repeaters with a 2 m. And after a hurricane you’re not gonna find any functional repeaters anywhere near. But be aware you better put your antenna up at least about 20 feet if you want real good reception and a little higher if you can. The books so you can go up to 60 feet with practically I can only get up to 20 to 35 feet and I am doing so outstanding it is unbelievable. However if you want to talk to people further than that you would need something different than a near horizontal wire. If you are trying to talk halfway around the world where you may not be able to get support From would you can easily use an inverted V. for me I have other antennas that will do that. This one here is strictly for NVIS. But this is not the only way for in VIS. Many people out there are talking about off-center dipoles that include 80 m doing well and I have talked to them on the radio. And they do have other bands they talk on. But I use separate antenna’s for the other bands. The more horizontal your where is the better your NVIS Will be. For those champions of the inverted V that reaches further out is fine but just remember the flatter you make that V to nearly horizontal the closer up you will be able to talk to people from NVIS. So I don’t even mess with that. Strictly Horizontal and I can talk to anybody even if they are next-door or 100 miles or 200 miles or 300 miles for 400 miles and every single person in between if they have a good NVIS antenna. Some people might say up close you’re getting ground waves. I’m sure that is possible but there is no blank spot “anywhere” No matter what the distance between my antenna 400 miles and that’s what I’m looking for. And I have talk to people as far as 500 but 400 and less has been extremely easy. I’m telling you I’m talking about like we’re talking in the same room. I am from Texarkana Arkansas. I use and Icom 7300 and no more than 95 watts. Many people in NVIS are using amplifiers. But I am not. I was talking to Austin Texas the other day and two other people here in my own state of Arkansas and they had asked me was I using an amplifier because it sounded that loud. I told him no. So I am convinced that with the right antenna you don’t need all that power. I did use a 65 ft counterpoise connected to the unan and it is also grounded. Another interesting thing. I used to always want to buy better radios so I will get rid of all that QRM and shhhhshing background noises. But with this antenna all those noises seem to have disappeared. It is very clear now. Note we did make the antenna longer than we wanted and trimmed it down to an exact resonant antenna.
@@timg5tm941 Well, I like the Double Bazooka, but that dates back to the 1940's. I would like like to try it with modern coax. Difficult right now as I live in a flat and the gardener keeps sticking his strimmer though my antenna. I have started connecting mobile HF antennas back to back. MFJ does their 'Octopus' The MFJ 2014, reviewed here:- ruclips.net/video/d5TP6oyLJx0/видео.html So, yes, I would like to make a cheap copy.
Very nice video Mr Tim. I home brew an End Feed antenna to 11 meters, with an old toroide picked up from an old TV. I make a 9/1 Balun with 12 meters tuned all bands except 20 and 11 meters. So put another wire with 5 meter cut off some pieces and with 4,40 an alf wave antenna tuned from 26MHz to 30 MHz with very very good results on 11 meters. So now I understand the working antenna with one lobe. 7351.
Another informative video Tim and spot on with what you say. I have been using both types you describe and the EFHW is now my antenna of choice. The beauty of the end fed is i can get it out into the garden away from the house and away from any electrical noise. Add in a decent line isolator on the feed before the coax enters the shack and bob's your uncle. The LC network is very efficient and will not heat up like a toroid will and thats where some loss can come in. I have come to the conclusion that i will not have the real estate to have an antenna for every band so pick your favourite and get an efficient antenna for that band and make contacts.
Sid thank you. I’m in the same position and I’m becoming a real fan of these mono banders myself. Hope to work you soon on 40. 73
Nice video Tim 👍.
I use a multi band EFHW for 40,20,15 & 10. I have it in a inverted L configuration with a slight dogleg to get it to fit in my small garden.& and I must say it works very well.
Thanks Stuart yes they work v well indeed 73
I'm a returning ham and am planning antennas at present, so this was very useful, thanks. I'll check you other videos out now.
Glad you found it useful thank you!
73 Tim, I also think it's best to use a band antenna but unfortunately we don't all have a very large garden. For the sake of discretion also HI. Superb video see you soon
Thank you and you made some good observations there 73
Ultimately we need bigger gardens and no neighbours Tim 😉
Great video👍
Oh for a magic wand or better still a lottery win! 73 Mark thanks for stopping by.
I do like this channel.👍☘️
Could you do 33feet up and 33feet down Inverted U vertical spaced with coathangers? What would the pattern look like? Cheers Tim, FOO was HERE
Could you not have 2 end fed monoband wires attached to the same feed point put separated as they go down the garden so like a fan dipole, but an end fed version? This would do away with the need for an antenna switch and wouldn't be too difficult to fit in to a small garden.
Sadly not Nick, owing to the high impedance at the feed-point. However, a half-wave at the lowest frequency, fed with a 49:1 will provide a good match on the remaining harmonics - hence a half wave for 40 is good on 20 15 10 etc.
Another good video Tim. It is funny this popped up on my feed, as I spent some of today installing my own EFHW, a half wave for 80m. I heard your QSO with MW0YVK but lost you in QSB. I've yet to fit the feeder in to the shack, but its promising!
Brilliant! It’s truly a small world. Hope to work you soon and good luck with the new antenna 73
Hi Tim really enjoyed this ,what you say is a good length for shortwave listening Best Regards Tim
Hi Tim. For Shortwave listening only the length of wire doesn’t really matter too much. If you can fit a decent sized wire about 50 feet or more it’ll allow you to hear lots on HF and down to MW and LW. 73
Awesome and informative! Thanks Tim
Thanks!
Backing up the theory Tim, I have a 124 feet (37.8 meter) end fed and confirm it works well on 80m, ok on 40m and it is dummy load on the higher bands.
Thank you Mr Adrian! 73
Ady G6AD
Actually with proper made transformer it should work on 20. Not perfect but acceptable.
Issues. 1. A wire which is a half wave long in free space does not resonate on its harmonics. If you have a horizontal 66ft long wire say 20ft high in the garden, then the harmonics are way off. Moreover it won't resonate on 40 metres either. (7.1MHz resonant wire will also be resonant round about 15MHz, 23MHz and 32MHz depending on particular circumstances). 2. The input impedance varies on each frequency from around 1800ohms to 3200ohms. So a 49:1 is pitched in the middle. From memory the first harmonic is around 2500ohm.
3. The EFHW is a high impedance antenna and is rarely implemented properly. It's a dog for common mode issues, which is one reason why so many people report it as being 'noisy'. It's not the antenna thats noisy, but its implementation. 4. The 49:1 transformer has a narrow bandwidth in relation to the 80-10m bandwidth boasted, moreover, the transformer expects the wire to be resonant at the operating frequency and it pretty much never is. Consequence is, I've ditched the multiband EFHW its a mess of compromises that are exceptionally time consuming to sort. The good SWR readings are largely down to system losses. Basically, the antenna is lossy on the low bands and inefficient on the higher bands.
So, monoband EFHW. I've designed and built a 20m halfwave vertical from scratch, using four short (520mm) radials. I built a purpose designed resonant tank type matcher and it is better than 1.2:1 right across the band, and the return loss is better than 30dB at 14.2MHz. It is 3 S points better than the multiband 66ft wire on 20metres. However, this antenna is not without common mode issues. This is clear from the EZNEC modelling. I've built an RF ammeter so I can measure the real life cm current, but need to do the test measurement. Basically, short radials do not decouple the antenna from its feedline. If we look at commercial installs (ie broadcast) of the vertical halfwave, then they use halfwave radials and a lot of them. Bit ironic, because I started down the vertical halfwave journey because of the short radial / "no counterpoise" meme. Turns out its another myth. There are better antennas and antennas properly designed for specific bands will always outgun multiband compromises like the "EFHW".
So after three years of sweating the detail on this stuff, then my small garden antenna is going to be a horizontal wire, centre fed and resonant on 7.1MHz. It will be as high as I can possibly get, probably 10/11 metres. The I will introduce some 'fan' elements for 20 and 10 metres and bring those to resonance. Capacity hats on the 66ft wire will tune the 40m element for 15m. This lot will be fed with 8 metres of open wire feeder to a remote tuner so I can impedance match the WARC bands, otherwise it would not need a tuner and I could use coax all the way. For 160m, 80 and 60, I'll short the base of the feeder to create a top loaded vertical and have a remote tuner to sort out the impedance matching. This approach addresses the point that below 40 metres in real world conditions, verticals outgun horizontal wires. Until I've done the design, build, measure I can't know this is the best antenna I can install, but its my best shot at the minute.
Interesting stuff thanks for sharing 73
Great explanation of harmonics.
Thank you 👍👍
What this video leaves out is that with an end fed half wave there are very advantageous gain lobes on the harmonic frequencies that are at low angles when mounted in an inverted V configuration. Something that you just cant get with a center fed dipole. Ive worked from Russia in one direction to Japan in the other using these lobes.
Totally agree. I’ve subsequently made a couple of videos on that very same point 73
Question? Should the counterpoise run back under the antenna in the same plane (in line with the antenna above) or does it matter as long as it is laid out ?
I measured the input impedance at 7 MHz of a 20 m EFHW, and it was insensitive to the positioning of the counterpoise, which was 2 m long in my case. The counterpoise is just coupling into ground so I wouldn't expect it to affect the radiation pattern significantly (G1JVG).
Enjoyed ideo. What about a 80 meter dipole?
If only I had the room!
Thank you for another very informative video. Will vertical vs horizontal monoband or EFHW have much of a difference in efficiency?
The choice of configuration (horizontal or vertical) doesn’t affect efficiency as long as for example, the antenna isn’t too low and then ground losses play their part. Otherwise it’s my suspicion that the mono bander, being narrower in swr 2:1 bandwidth would be nearer a dipole in performance on the full and wavelength frequency than the broader banded 49:1 multiband. I wish I had enough room to run both off WSPR to gain a full scientific perspective. 73
Totally different polarisation & radiation patterns from horizontal & vertical so very different depends what your looking to do as to what you use it for. Mr 2e0ftx
Can you use a endfeed antenna in a vertical configuration
Absolutely!
Question please: How is the directional (end vs. length) radiation pattern on the EFHWA?
I'm new to HF and am planning my EFHWA install. Here in the US, should I run the element north south to contact Europe /Asia & east west for Canada / South America?
Or does this consideration make that much difference?
Ideally, I'd like to contact all directions... any ideas welcome.
Ken - K0CCT
If horizontal then running the antenna N/S would give broadside gain to E/W and vice versa. Any vertical aspect of the antenna would be largely omni-directional. Inverted L for example gives a bit of both.
Tim I'm using a MEF-330-1K transformer with a 66' 12g wire up/over a 45' tree in a sloper configuration pointed northwest/southeast direction. Will this work have directivity on the 10m band in those direction's and what kind of gain would it have?
Difficult to calculate gain but the directivity is slightly biased towards the lower side of the antenna. So if it’s fed low and slopes at an angle upwards, the direction favoured is back towards the direction of the feedpoint. At 66 feet there will be some pattern break up and as much of the antenna will be over a halfwave in height for 10m the lobes and nulls May be pronounced. It’ll work though 73
@@timg5tm941
Thank you I will be putting up my 66' 12g wire shortly hopefully I will be able to have some qso's in both directions.
II might be able to move the front wire more south easterly to direct my signal.
Please do more videos on the end fed half wave wire antenna on radiation patterns in the near future.
Thanks
Stay safe during the covid-19 pandemic.
73
PS My MEF-330-1K transformer is up 10' off the ground which just might help with forward directivity in the wire south easterly direction.
this applies to a 80m efhw? Does the multiple lobe increase effectivetines of the RX/TX?
Once the pattern breaks up in the higher frequencies it becomes a little more of a lottery. If the station you’d like to work is in the direction of a lobe that’s great. If they are in the direction of a null that’s when you may struggle. It’s the same with large doublets on higher bands too. 73
Interesting video. If you put the endfed up as an L antenna (no «nulls» in a vertical segment) and focus on the gain of several halfwaves on 20-6m (40m version) it might still be a better solution than a nest of singelbanders who also interact 😉
Great point 73
Hi Tim the best way to get 80 meters on a small garden is to add a 80 meter loading coil and 3 meters wire to a 49-1 End Fed Half Wave Antenna .
I agree .. a great method and on my to-do list ... 73
yes, I added an 80-meter coil, once I trimmed the wire I got the SWR 1.1in the SSB voice section. it works very well far better than the G5RV half size with 80-meter coils fitted.
Hi Tim, ive just ordered an LWHW end fed 20m long antenna,it comes with a 9:1 unun from moonraker. Ive done zero HF before so is this the right ant to start with? The antenna is advertised for 80-6m. Your thoughts greatly appreciated. Will i need an antenna tuner? Thanks.
Hiya welcome to Hf! It’ll work .. I’d run a 17 foot counterpoise from the ground lug on the unun if you are mounting the box near the ground level. This will take some of the return rf current away from your coax outer shield and hopefully stop rf in the shack. You will need a tuner .. on some bands you can use the internal tuner in your rig (if it has one) as swr may well be within 3-3.5:1. On other bands it won’t be so you’ll need an external atu. My only slight concern is that at 20m long it will be a Halfwave on 40m and a tuner may find it tough to match that owing to the high impedance levels but hey put her up and see how she goes! Good luck 73
@@timg5tm941 Thanks for responding. My rig is the 991a with inbuilt tuner. Can you recommend a suitable tuner? Thanks.
paulkazjack there’s loads out there. If your budget is around 200 pounds then take a look at the LDG range of auto tuners. Might be a good place to start.
What other bands could you use with a good external ATU? 73
Probably most/all but efficiency might be very poor.
@@timg5tm941 Thanks again Tim. Will be putting up the EFHW this weekend. 73
Hi. What is the minimum height for this antenna to the 49:1 transformer?
What about the ground radials... how many and how long?
Ground radials are not required with end fed half wave antennas. 73
Very interesting analysis, I use an exactly similar 4010 EFHW at my shack. Thanks 👍 73 de VU3MES Satyan
Thanks for watching! 73
Nice Vid. Nice Barn
Thank you!!
Thanks for the videos. More pieces of the puzzle just came together.K7WHN
Thank you 73
Thanks Tim
Cheers Martin 73 👍
Could you do same video for a 140ft efhw with 49:1 transformer please
Hi Andy. If I had the room for that much wire I would, but alas 66 ft or a little more is all I can fit in. 73
@@timg5tm941 I've only got a 45ft by 45ft garden but have a 140ft end fed and works really well at a height of around 20ft,any higher the swr goes mad.
@@timg5tm941 yes I have the same problem no room in the garden. 40-meter end fed with 80 coils works great for me.
Thanks
I use a multi-band end fed half wave antenna configured as a sloper at my qth. For portable work I prefer a mono-band end fed half wave antenna. Since I work portable during the day, my choice is an antenna for the 20 meter band. I use a commercial antenna from the German company www.lambdahalbe.de that has and adjustable window line stub instead of a matchbox. 10 meter radiating element, 4 meter stub. It is easy to adjust the SWR for various situations. Also, it is much lighter than carrying an extra match box. Sometimes I hang it from a spiderbeam 12 meter telescope pole (fits vertically very well) or hang it from a tree. I try to avoid trees because the seem to want to keep my wires and not give them back. End fed antennas are relatively cheap to buy and cheaper to make. For my situation they are an ideal solution. 73! SV0SGS
Great info thanks for commenting! 73
Is that horizontal or vertical?
Hi Steven my antenna at home is an inverted v shape with both ends running down vertically. 73
got it thanks
Go on Tim!!
Cheers! Hwyl Fawr 👍
My multi-band antenna is ia 5-band antenna, 23 meters long. 10, 15, 20, 40 and 80 meters (80 meters electrically shortened) from the dutch company www.hyendfed.nl. I have it configured as a sloper. An inverted "L" or inverted "V" configuraton is also an option . A mono-band antenna for 20 meters (or for 10 and 15 meters) can be configured vertically for small gardens. An advantage to both antennas is that no tuner is necessary. 73! SV0SGS
Thanks, great info 73
Frank, i have the very same antenna and i am always surprised just how well it performs on 80m. Yes it is a compromise on 80 but as signals are generally strong on 80 at night you can't really tell the difference.
You have missed your chance to show why the EFHA is better by not showing the results using the MFJ.259B.
I am making up an EFHW for 40mtrs, My radio is a kit built 40 mtr only, 25 watts, I hope to use it for some SOTA fun ...VK3HJW
I’m sure you’ll enjoy that antenna Stephen
A 40 m antenna it’s not exactly 1/2 of an 80 m antenna as people would think Same for a 20 m not exactly have a 40 m and so forth. It makes it simple to call them 80, 40 and 20 etc. because you’re close to that but not exactly in the very center. For NVIS you cannot beat the voice part of the 80m band that some call the 75m at night time. So I have a mono band 75 meter half wave end fed resonant antenna attached to a 49 to 1 unan sloaping from 20 feet up from my second story office to 35 feet up with the far end in a tree and I can hear and speak to anyone outside my door to 400 miles away. if they sneeze I wipe my nose is that good. The kind Elmer who was helping me put this up tried to convince me not to make it a resonant so I could with the unan and an antenna analyzer talk on other bands. He tried his best to get me to do this. But you will lose clarity on the 75m if you do that. And all I was interested in the 75m. It was a big argument and finally he acquiesced and helped me put up a resonant 75m resonant 14 guage wire NVIS antenna. To me it was like that mystical unicorn that you could not really find. But after putting this antenna up it was like a miracle. I found everybody else around that had NVIS Antennas and towards the evening the band comes alive and I can talk to everybody and they can talk to me it is like a miracle. And I’m really happy with it since I am with amateur radio emergency services. This appears to me to be tons better than anything else I’m trying to communicate with other people outside if I’m in a disaster area. Because you can talk to anybody from right next door up to 400 hundred miles away and sound clearer than your only cell phone. And if the person you’re talking to also has an NVIS antenna they do not have to rely on repeaters with a 2 m. And after a hurricane you’re not gonna find any functional repeaters anywhere near. But be aware you better put your antenna up at least about 20 feet if you want real good reception and a little higher if you can. The books so you can go up to 60 feet with practically I can only get up to 20 to 35 feet and I am doing so outstanding it is unbelievable. However if you want to talk to people further than that you would need something different than a near horizontal wire. If you are trying to talk halfway around the world where you may not be able to get support From would you can easily use an inverted V. for me I have other antennas that will do that. This one here is strictly for NVIS. But this is not the only way for in VIS. Many people out there are talking about off-center dipoles that include 80 m doing well and I have talked to them on the radio. And they do have other bands they talk on. But I use separate antenna’s for the other bands. The more horizontal your where is the better your NVIS Will be. For those champions of the inverted V that reaches further out is fine but just remember the flatter you make that V to nearly horizontal the closer up you will be able to talk to people from NVIS. So I don’t even mess with that. Strictly Horizontal and I can talk to anybody even if they are next-door or 100 miles or 200 miles or 300 miles for 400 miles and every single person in between if they have a good NVIS antenna. Some people might say up close you’re getting ground waves. I’m sure that is possible but there is no blank spot “anywhere” No matter what the distance between my antenna 400 miles and that’s what I’m looking for. And I have talk to people as far as 500 but 400 and less has been extremely easy. I’m telling you I’m talking about like we’re talking in the same room. I am from Texarkana Arkansas. I use and Icom 7300 and no more than 95 watts. Many people in NVIS are using amplifiers. But I am not. I was talking to Austin Texas the other day and two other people here in my own state of Arkansas and they had asked me was I using an amplifier because it sounded that loud. I told him no. So I am convinced that with the right antenna you don’t need all that power. I did use a 65 ft counterpoise connected to the unan and it is also grounded. Another interesting thing. I used to always want to buy better radios so I will get rid of all that QRM and shhhhshing background noises. But with this antenna all those noises seem to have disappeared. It is very clear now. Note we did make the antenna longer than we wanted and trimmed it down to an exact resonant antenna.
Great points! 73
I am getting rather disappointed in the ham radio communities obsession with end fed half-waves. Lets see some NEW designs using MODERN materials.
Did you have anything in mind for the new design?
@@timg5tm941 Well, I like the Double Bazooka, but that dates back to the 1940's. I would like like to try it with modern coax. Difficult right now as I live in a flat and the gardener keeps sticking his strimmer though my antenna. I have started connecting mobile HF antennas back to back. MFJ does their 'Octopus' The MFJ 2014, reviewed here:- ruclips.net/video/d5TP6oyLJx0/видео.html So, yes, I would like to make a cheap copy.
Is there any way to get 80, 60, and 40 on an EFHW? (Maybe with loading coil(s) or traps?)
*73 de AF6AS in **_“DM13”_** land*
Absolutely - try a 110uH coil at the end of a 20m long efhw, followed by 2m approx of wire (trim that to get a match on the part of 80m you wish.