This Nelson Antennas 80 Meter EFHW is AWESOME!!
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- Опубліковано 12 тра 2022
- In this video we take a look at the Nelson Antennas HF End Fed Antenna UJM-EFHW-80-10. This is a 49:1 End Fed Half Wave Antenna that is resonant 80-10 meters.
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#hamradio #EFHW #NelsonAntennas - Наука та технологія
Looks like a solid setup! I think the manufacturer misspoke in his letter. The resonant frequency of an antenna actually increases with height above ground. Antennas close to the ground typically exhibit lower impedance and a lower resonant frequency (as if they have a LONGER electrical length). Bottom line, check your antenna resonant point in the position of installation before doing any trimming. If you trim a wire to resonance close to the ground, it's going to be resonant above the desired frequency when you get it up to your final installation height.
Just came across your video. I have the Nelson 40m-10m I bought about 2 years ago. I have it in an inverted V in the backyard with the highest point at about 24 feet. Low points are about 3 feet off the ground. I have 2 sets of power lines near by and this antenna still performs very well. I do have a high noise floor. I am not using a counterpoise or a ground. Coax comes in through a window pass-thru and I disconnect it when storms roll in. I am near Savannah, GA, and have made voice contacts in the Carribean, France, Arizona, Minnesota and the NorthEast. Cannot seem to hit California. I am impressed with this antenna and especially its construction.
I bought a 9:1 transformer from Nelson Antenna 2 years ago. It’s been in several installations and had double the recommended power thrown at it and it’s still performing great. They make a quality product with all the customer support you could ask for.
I have the Nelson 40m-10m and it worked fantastic, I bought the 80m resonator kit and the results were not what I expected or hoped for. I then ordered the 80m-10m wire kit, mounted it using a 12m spider beam pole then ran the wire (east to west) along a tree line approximately 40 ft in the air. The results were fantastic. No trimming of wire needed with my configuration so I can definitely recommend this antenna.
I just bought this antenna and set it up in a sloper configuration. Its about 30' or so up in a tree and then slopes down to about 4' from the ground and then 75' of RG8X coax. Its been working really well for me and the build quality is great.
I like how you show setup where these other guys just buy antennas and show the new antenna and just talk about it
Looks cool, Thanks for getting us a discount too Mike!
Interesting video. Thanks. I run a Vibroplex endfed 135' wire out in my backyard - and I'm totally loving it. No radials and no counterpoise. Stock out of the box. I just installed one of their 10m wires but am having some issues. It's hanging on a 30' Jackite extendable pole. I checked the antenna hooked to this pole and leaned on some saw horses and the match was 1:1. Now that it's up, it's not. I suspect that my amateurish non-skill at making PL-259 connectors is at the heart of the issue. So. as soon as it warms up a bit (and my pneumonia goes away!) I'll be replacing them. Thanks for your always informative vids - and your sense of humor.
When I use electrical tape I wind the first layer with the sticky side up and then turn the tape sticky side down that way it is easy and no mess when taking off of the connector. I never cut the wire I just fold it back on itself to resonance. Love the sound of your mike on UA-cam
I was just talkin to someone about this antenna! These are great antennas and well made! Shane really done it right.
I had mine hung horizontal at about 20 + feet and had great SWRs from the lower half of 80m through most of 10 with 30 being the only one not resonant. 1.6:1 was the highest reading (excepting 30m). In fact I'm pulling the ZS6BKW down (its too close to the house and a metal roof) and want to rehang my 40-10 that I worked Australia on in 2019.
BIG thanks to both of you Mike and Shane! I'd been eyeing the kilowatt 40-10 for a while now. Finally jumped on one with the discount code!
Be thinking about the 200w version. HOA constrained here - would run coax through attic and have matchbox under soffit. Did you have to add a RF choke? 73 de ki5gx
@@shawnp6653 Not necessarily. But I do have a counterpoise and choke on mine. Does it help? Maybe? But it doesn't likely hurt anything. With the trouble you're going through to run everything. You may want to go ahead and throw the kitchen sink at it the first time.
@@sockeatinggolden8316 Agree 100% on doing everything from the git-go. I keep flip flopping between the efhw and the efrw - I just want to get back on the air! lol Really appreciate the reply! Happy hunting & 73 de KI5GX
Funny this showed in my feed today and I was like 'hey I just worked Mike yesterday'. Awesome.
I ordered one, can't wait to set it up. I'll be able to mount it about 7 feet and as a sloper. I'll check the SWRs first, then add the 4 foot counterpoise to a ground rod and re-check. I have terrible noise on 40m on my current EFHW. So hoping this helps out. Probably also put an ugly balun at the feed point.
Hi Mike,
You have a winner there. Have heard great things about Nelson antennas. Stay safe. 73 WJ3U
I love the clear case! Great antenna but I love your radio more!😄👍
I’m using Nelson’s 9:1 match box. And just ordered another one and it works great! It’s a very popular antenna. This one is as well. 👍
I really like the 9 to 1. Currently using it in a sloper configuration. That is my field day/ portable antenna. I will check this 40m with the 80m resonator. Currently have a 80m horse fence dipole at an inverted V and spans on the property lines lol. So the 40m with the 80m resonator maybe worth a look! Thanks Mike! Btw good to work you on pota!
I like the see through! Then you know what you are getting.
I emailed him several times about the antenna before getting one, (Super nice guy) and now it's the only antenna that I use... I have the 40 meter one, I can tune it on 80 meters with my turner on the high side of the band. But don't get on 80 meters that much unless there is a POTA station.. Hi hi.
This was my first antenna! Still using it now.
This does look good - I think the issue I would have that in Europe we spoilt for choice on quality endfeds, I prefer ukantennas - they are hand made and the manufacturer is great in customer service. I have one 80m end fed and the ukantenna is amazing, no trimming, just a lovely un-un and quality wire with a quality insulator - the price and speed of deleviry in the UK was exceptional. I think if I was in the US I would be at least buying one of these antennas to compare, but I think the thought of import duty and time to deliver makes that a bit of expense. Great video tho, thanks for supporting the ham radio community !
Good looking antenna. I might suggest that, rather than cutting the antenna, loosen the connector and pull it back on itself until you get it where you want it. Once you cut it, you can't put it back.....but you already knew that!
I run the 40m version. Transformer is high, so the antenna is horizontal out over a downward slope. I varied the box distance to the house, to sort of optimize the SWR. No trimming, grounding, radials, or counterpoise. This antenna works AWESOME! Great SWR all around. Farthest qso @ 100w was about 9600 miles. What's there to complain about? LOL
Nice socks, i didnt know you were a 90s aerobics instructor
EFHW are very effective. I use a 80-10 from Hyendfed in Netherlands. Attention to detail is outstanding. I never use a tuner. SWR is virtually 1:1 on all bands.
Ooo a new tenna!! That looks sweet.
a great review & thanx! 73 de WA4ELW in TN 🇺🇸 dit dit 😃
Thanks for the discount code! I was looking for a legal limit EFHW and just bought one from Shane.
Heck yeah man! You have chose wisely!
I have two 8010EFHW and one 4010EFHW and have used the 80 and 40 for over 7000 POTA QSOs... and they hold up well all my droppings and fill year weather (NY State cold winters).. and then are VERY good matching vs all others EFHWs that I have purchased.... good stuff.. and it all that I used (at 1500ft POTAs i his Italy and Spain and Washington and even Alaska with them simply during the grey zones in the evenings... not bad. As you say, my POTAs are sloper transformer 5ft of ground at car up to 30-40 ft in trees (I use kite string 50lb and a good throwing arm) and I am good to go. - KD2PWB.
I have one and love it. great antenna!!
I installed the same antenna the same way you did. I did no trimming. My rig's internal tuner can handle the bands well.
I'm glad to see an antenna company using the idea I had about using transparent lid boxes so you can see if there's a problem with the balun/unun without even needing to open it up! 🙂
Great video, I love the Nelson Antennas. Are you sure about shortening the antenna? SWR is best higher in the band, which means to add wire. As the antenna matching box is closer to the ground ex. Sloper, i thought RF will see the antenna longer. Love the videos. Congratulations on Australia!!
No need to cut the wire. Just pull more of it through the insulator and wrap it back on itself. That way you can put it back the way it was if you want.
Interesting and educational vid. Keep them coming, sir,
I have the Nelson 9:1 Random Wire 150-watt antenna (50 feet of wire, currently out of stock on ebay as of 8/14/2022). The first time I hooked it up I made my first SSB voice contact to Australia from my QTH in Wisconsin, USA, about 8600 miles. (14.256 MHz at 14:15UTC) I set up the antenna as a sloper, with the transformer about 2 feet off the ground and the far end of the wire about 29-30 feet up, connected to a telescoping Jackite fiberglass pole. Parts of all the bands were in tune without a tuner, but, being a random wire 9:1, I used the built-in tuner on my FT-991A to bring it into line across the entirety of the bands.
The first thing I heard after setting up the antenna and turning on the radio was a guy from Australia (Cory, VK4KA), so I gave it a shot and got my first and only voice QSO to Australia, breaking into his pileup after about 10-15 minutes of persistence, running 100 watts. I've used the antenna for two successful POTA activations since then (same sloper setup as described, but using my IC-7100, which is my POTA rig) and I couldn't be happier.
It works great and the construction is heavy-duty and made to last. The 18-gauge marine wire is more supple and flexible than it looks in the pictures on his ebay page. It's user-friendly and quick to set up and take down.
This is a lifetime antenna for portable use, and if installed permanently, mother nature may bring it down, but 50 feet of new wire will have it up and running again.
With as many times as you are on the roof testing things, your neighbors must be like mine ... thinking I'm either crazy or my house leaks.
what a comfortable roof ;) ...nearly flat..
my roof has an angle of much more than over all 90 degree (because of the snow).
Thx and 73 from the top of a Mountain fairly high (every thing below 800m is just a hill).
sorry for my poor english:(
Got my order in! Been looking for an end-fed antenna!
I am envious of your neighbors trees. Best I can do, so far is $50 20ft steel pole and a 5ft mast on the roof of the house. I need to wind a coil for my 40-10 EFHW to see if I can pull in 80 as I only have about 85ft clear. So still too short for an 80-10 in inverted L configuration.
Dude, you're hilarious. Great videos. Signed Another VK3
Awesome! Thank you!
Hey Mike where can I find one of those medal wire clamps on the Antenna wire?What is it called?I looked at Home Depot but no luck.
Can you provide a link for the antenna end loop mini clamp?
Another vote for Nelson antennas. I have an 80-10 EFRW that actually tunes 160-6 (including 6 with my IC-7300 internal tuner). His stuff just works.
Hi, how many feet of wire are you using on that 9:1? I have one also and using it with 71'.
I have his 9:1 unun. Works great. What are the wire ferrules that he uses? Building another antenna and I'd like to use them.
If you almost have enough room, you can put it up as an inverted V or L to get a few extra feet
In your presentation you mentioned a 1kw version of the 80 - 10 antenna. The only 1kw antenna I see listed is 40 - 10. Or do you have to bey the 40 - 10 and add the 80 kit?
Part 2? Do you end up trimming any off the length?
I TOTALLY saw it coming!! LOL.
My IC-7300 has a hard time tuning the MFJ 1982MP EFHW on 10 and 30m. Perhaps I have the matching network too high, at 20' AGL.
Been using the Chameleon ECOMM III Portable EFHW for 160m and 17-10m. It works great on 10m. The IC-7300 has not problems tuning it because the SWR is pretty low on those bands.
I'll have to check out Nelson antennas sometime. Looks like it would preform well on 10m SSB, compared to the MFJ I'm using. Where the MFJ really shines is doing FT8 on 80, 40, 20 and 15m. The SWR never goes above a 1.2:1. The lowest is a 1.05:1 on 80m.
When you say zig-zag could that be the wire laying on the sloped roof (3.5 in 12) then off the end to a pole in a straight line??
I only have 100 feet of space. Can you recomment which antenna I should get from Nelson Antennas.?
IC-7610!!
Very Nice
Well, now I know why I haven't seen or heard from Shane in a little while. I guess he got crazy busy after these videos. 😂
He’s in his bunker wrapping toroids like crazy.
Awsome...wohooo IC-7610 kicks ass Baby...yehaaa
I went to the web site but did not seed that antenna. It would be a perfect fit for my area. Is there a model number for the 9:1 antenna for the &79.99 price? I would think that the price would have gone up a little by this time.
Thanks, Frank
KC2AUP
Has anyone compared the Nelson to the mfj-1982 series? I was going to buy a Nelson but the guy won't respond to messages on eBay before the purchase so I'm hesitant to buy. If I can't get a response before I buy, I'll never hear back after I buy!
I hope the 6-40 meter one is just as good that’s all I have room for
How is it working?
I went to have a look at purchasing this antenna and found he does not ship to Australia.
Your noise floor is low because this antenna is NOT noisy! It totally rocks.
Great setup. Looking at getting this as my first HF base station antenna to use with a G90. Silly question... Does movement in the element due to wind affect reception or transmission at all? I see tons of folks connecting to trees that sway and for portable ops flimsy masts that have tons of movement. I'd assume it doesn't affect much but I was curious. I haven't seen any reference to this in the General study material. Thanks
Great "thinking" question!
I was predicting that to happen. LOL Only because you were video recording it. LOL That is the Law. HAHAHAHA!
I took a 10-40 wilson and made a inverted L on my wooden wrap around deck about 15-20 feet high not much luck
Look like a great antenna but the seller is away and store is empty :(
I’ve had one of these for years. On mine it gets water in the case from somewhere. I’ve tried sealing better it with silicon with no luck. I haven’t had any issues with it the water though.
He says to not try to seal it any more than it already is, but drill a small hole in the bottom where water might settle.
@@hamradiotube are you saying I didn’t read the manual? No surprise! 🤣
@@deltaecho-59tx60 hahahaha
Great video, unfortunately I'm weak and you've just sold him another....
30 meters?
Cool
It isn’t waterproof and still has some water in it. But it’s still working!
that face said "fuuuuuuuuuuuu oh well 🤷"
Discount shows it was valid in April, 2022 - NOT May 2022
That Messi & Paoloni is the BMW of coax, heh?
Well they're Italian, so more like the Lamborghini of coax.
@@hamradiotube Ahh...
Is this still the antenna you’re using at the present time. Gotta love when stuff goes right to work. Personally I’d leave it the way it is. Especially since your tuner has no problem touching it up.
It's one of 2 I have over the house, yes. It has stretched a little since making this video so it is resonant at the bottom of every band, or just below, which is fine. I could trim it a bit to bring it back up to resonance but it's not really a big issue. If I got this antenna again, I would get the higher wattage one. He rates this one for 75 watts FT8 but every time I use this antenna for FT8 it saturates the toroid and the SWR goes sky high. Just need to let it cool down and it's back to normal. Most I can do is about 50 watts reliably. Not a fault of the build quality, it's just the smaller 140-43 toroid it's made of.
@@hamradiotube I thought the whole concept of FT8 is minimal power? I’ve seen many videos where people use a watt or less and make thousands of contacts. Stretching is pretty normal I’d imagine. Glad to see they’re working great for you.
You say cut off a couple feet please don't do that on your first cut sneak up on it HI. Personally I'd leave it as it is for a while, looks good.
If you cut 2 ft off the length, the higher bands will be way too short....it will resonate hundreds of Khz too high. Rather just use a tuner on 75 then there will be no need to use a tuner on all the other bands. If you cut it, then no tuner will be required on 75....but every other higher band will need an ATU
what are those strain reliefs called
They're called this: amzn.to/3OzkZXk Note these are for this wire gauge.
@@hamradiotube thank you sir
FWIW, as at 15th May, the eBay page on the "discount" link displays:
"The seller is away until Thu, May 19, 2022. Expect a delay in delivery until they return." .
So, no option to purchase right now.
73
VK2ZRO
Yeah I got the same message. Yay for us, lol
Tried to order too.
I looked at building an antenna from a kit. My Elmer said you might just spend the extra money for one already built. I responded with: Mike K8MRD was able to do it so; I can do it. Hi Hi *That's the point of you showing us; right?
I dont discriminate. I build and buy. I just want all the antennas! I don't care how I get them.
A big mistake on how they made the antenna. The electrical connection between the toroid and the antenna itself is by way of the wire lug under the nut on the eye bolt. This is a bad idea because the connection is out in the weather, subject to rust and other corrosion, and depending on the nut not getting even slightly loose with time and wind jossling things around. Even if everything is stainless steel, it is still a bad idea to depend on the integrity of the tightness of a nut to be critical if you can avoid it. A much better way, and I would recomend you modify your, is to solder a wire directly to the toroid and run it out of the housing through a hole and connect it directly to the antenna wire. Drill the hole so the wire fits tightly through it and it act like the recomended "weap hole" to let water out.
Thanks for your review.
7:31... Gravity is not my friend either.
Do you mean 5/13-23? You say 4/13-23 in the description.
Oh, yes I sure did. Good catch
umm, where is the end fed. I see a bipole. NOT THE SAME....
I guess myself, the manufacturer, and the other 8,200 people who have watched this video are all wrong. Maybe you should get some glasses??
They disappeared from eBay, I what happen to Nelson Antenna
If you don’t see a product on eBay it means they are sold out.
@@hamradiotube Awesome! I was worried they went south, lol!
👍🙋♂️
The jump cuts are so bad that they are amusing. Love how you travel from one part of the roof in a snap. You should have just clicked your finger. And the antenna would have been up.
eBay shop says: "This item is out of stock."
Buyer beware that the Link is for the "Transformer Only". My bad, I didn't read the whole item description. I just order a useless devise. It's not really useless, but for the $50 plus a little I ordered it thinking it would cost almost that to build the complete antenna. I already have two, and a 9:1 that I built, so I didn't really need another Transformer. Oops, I thought it was complete, since that's what K8MRD Mike recieved!
He sells them both ways. Read the description.
I asked this dude a question about one of his ebay ad's because the description didn't match the pictures and suggested he take a moment to take a new picture to reflect the ad. He told me it was fine and blocked me from purchasing. 🙄
I would not touch that antenna at all. 2.0:1 at the top of 80 (75)? Can't beat that. On 20M your SWR was 2.0:1 at the bottom and went down higher in the band and would benefit from a longer wire, but still well with usable limits. Mess with it for 80, you'll end up worse on 20.
I haven’t. And yes it does seem short. I assume it’s because I have put it up exactly the way he said not too in the instructions, which I mention in the video. Either way, it’s working great for me.
80m is a mental asylum. 😂
Old men complaining about their prostates and total (as you said) total nutjobs.
Probably why I spend a lot of time there 😮
Yep that’s why I always buy the 40m-10m version lol
Thanks for the review, but _please_ lose the totally unnecessary and very annoying music track.
I got the stupid 10-40 smh
I can't understand why you insist on cutting it. Doing so will wreck the upper bands and you talk like only 80 meters will be affected. ???
I didn’t.
If the women don't find you handsome, they should at least find you handy.
you keep your stick on the ice.
I don't want you to fall off your roof. Your videos are great!! de M3KXZ
Just Ordered mine! de KD2SCR