5 Band EFHW Antenna 80m-10m | 49:1 End Fed Half Wave

Рет қаралды 30,531

Күн бұрын

Here are my experiments and modifications with an EFHW (end-fed half wave) based on the VK4YE design, testing, 80m loading coil, the coax counterpoise, and the common mode toroids. This allows a antenna for smaller spaces and backyards.
The BEST Multiband HF Antenna for Limited Spaces! 👉 • The BEST Multiband HF ...
Toroids 👉 geni.us/zl6H
FT-240-43 👉 geni.us/qpzIxP (Amazon)
FT140-31 👉 geni.us/ps6to (Amazon)
VK4YE
sarc.org.au/wp-content/uploads...
🎥 Watch more recent videos here: / hamradiodx
⏱️Chapters⏱️
00:00 5 Band End Fed Design by VK4YE
1:34 Antenna layout
2:24 Building the 49:1 Unun
3:53 80 Meter Loading coil
6:00 Common Mode Current Choke
08:58 SWR Results
13:07 How many toroids should you use?
15:15 A Full Size 80m EFHW is actually a multiband antenna!
16:14 Adding 160m capability
► Gear I Recommend: www.amazon.com/shop/hamradiodx
Support Ham Radio DX:
► Patreon: / hamradiodx
► KZfaq Memberships: / @hamradiodx
► PayPal Tip Jar: www.paypal.com/donate?hosted_...
► Buy Ham Radio on Amazon & eBay: geni.us/HamRadioDX
► Merch: hamradiodx.net/merch
Items in My Shack:
► www.hamradiodx.net/vk7hh-shack
Contact Me:
► Website: hamradiodx.net
► Facebook: / vk7hh
► Instagram: / hamradiodx
► Twitter: / hamradiodx
► Discord: / discord
► Email: admin@hamradiodx.net (note due to high level of email - if you have a question the best way to contact is via the comments section of the video)
► Ham Mail: Hayden Honeywood - P.O Box 5071, Sandy Bay Tasmania 7005 Australia
#HamRadio #AmateurRadio #EFHW
Music:
Bensound: www.bensound.com/royalty-free...
Epidemic Sound: www.epidemicsound.com/
Some links are affiliate and I may receive a small commission on sales

Пікірлер: 41

@HamRadioDX Жыл бұрын

The BEST Multiband HF Antenna for Limited Spaces! 👉 kzfaq.info/get/bejne/hbVymtR3vs66Zn0.html

@n3jw34 Жыл бұрын

This is a terrific video to me, Hayden, as I have an immediate need for a shortened EFHW for 80-10M! Really appreciate your labors in experimentation and the detail included. I use an ATU, so super low SWR not an issue. Looking forward to more on this subject from HRDX. Mike, N3JW, FL USA

@tomon7dc225 Жыл бұрын

Nice explanation. Thanks, you give me more idea's to experiment with EFHW.... I'm trying to make a vertical EFHW for 20M.... first test show workable on 20, 10 and even 6m.... have to fine-tune and the check again.... Next: an 80M.... but in a zigzag pattern.

@WoodyPhillips Жыл бұрын

Built 2 of these (gave one away to a new ham). Works great!

@TheNoCodeTech Жыл бұрын

Great video man. I use a 49:1 EFHW On the rare occasions I get on HF. Quite educational and entertaining. Thanks.

@HamRadioDX Жыл бұрын

Thanks for watching!

@AvocaSingleTrack Жыл бұрын

Great video Hayden. You should make a similar video on Fan Dipoles . I racked my brain for 3 days with mine. It was always 20 and 10m that were the problem, even though i had physical elements for 20 and 10 , in additional to full elements for 80 and 40 . No luck, thing would just not tune 20 or 10 . I ended up adding to the 20m wires and med it 30m which tuned. Got 80, 40 and 30 , nothing else below 2:1 . I never remember having such probs with fan dipoles when i ran then years back...

@daveh7720 11 ай бұрын

Great presentation! I'm looking for ideas for a packable antenna for portable use, and this might be a contender. One suggestion on the egg insulators at 4:01 though: those are designed so the rope and wire are meant to thread through the hole at the far end. That way the loops themselves will still be intertwined and support the antenna if the insulator breaks. It also means the weight of the antenna is compressing the insulator instead of trying to stretch it, so it'll be stronger. Not a big issue for a lightweight wire antenna and ceramic insulators, but for plastic or 3D printed insulators it can make a difference.

@8thspirit Жыл бұрын

Good 49:1 makes life ez. Thanks for content.

@K5ATA 7 ай бұрын

Great video... Basically, I just want to say thanks for sharing!

@HamRadioDX 7 ай бұрын

Thanks Steve! I appreciate it mate

@K6TJO Жыл бұрын

I’d like to see a video of the techniques used measure the loss of the transformer. Other YT videos seem to indicate fairly significant losses can be mitigated with varying winding pattern and using high quality capacitor

@n3jw34 Жыл бұрын

And I just became one of your Patrons. An old guy now, labor limited. Hope you'll consider some way to package this as a kit when in final version, to sell. Maybe have a third party handle the heavy stuff? (Amazon, etc.)

@DonzLockz Жыл бұрын

I seen an older video recently where Steve Ellington said to use a capacitor in the middle of the antenna wire to get better VSWR on 20 and up. Have you heard of that Hayden?

@mabo4848 Жыл бұрын

great

@oldfartonabmx2122 Жыл бұрын

Sounds just like the kit I just built. Currently my coax enters the metal shed at about 3 meters from the un un and I don’t have a counterpoise yet. Wondering if I should. I take it you hook into the outside of the SO239?

@HamRadioDX Жыл бұрын

I used the coax as a counterpoise and then placed a common mode choke consisting of some turns through a FT240-43 I think toroid.... but a counterpoise will also work, and yes it was a binding post just connected to the shield of the SO239

@chilskater Жыл бұрын

I have 2" diameter of PVC pipe and 2.5mm insulated wire..how many turn i need for 80m band?

@ericgilman5457 Жыл бұрын

Question on your home made choke using rg8x. What size and mix toroids did you use there?

@HamRadioDX Жыл бұрын

I think it was FT140-43... several of them. But now I use FT240-31 with several turns through it

@multilecful Жыл бұрын

Why are you still twisting the primary? My test seems to suggest it is a waste of effort.

@DonzLockz Жыл бұрын

You said you used FT240-43 but linked FT240-31. I'm confused.🤔 Looks like you have been busy Hayden, I guess you would still use your internal ATU for better VSWR. I thought you have to ground all EFHW's. I heard the amalgamated tape was not UV resistant, probably won't matter much but maybe use a UV tape over it, dunno.🤔 When is this going to be mass produced?😉👍

@HamRadioDX Жыл бұрын

Oops! Good catch, I better update that link. Yes usually use the inbuilt ATU especially if the whole band can’t be covered. Amalgamating tape isn’t UV resistant so I give it a wrap of electrical tape over the top, which is. Mass produced, ha! There’s plenty of other end feds out there that are better ;) thanks Don

@DonzLockz Жыл бұрын

@@HamRadioDX Thanks Hayden. The PDF said grounding was tested but found not to be necessary. I do want to build one down the track for sure.🍻🤓

@antennafarmer7380 Жыл бұрын

I use the 80m 1/2λ and 10m reception has always been poor. 6m is even worse. I don't think most ceramic capacitors work well on 6m.

@1shARyn3 Жыл бұрын

why the 100pf cap?

@HamRadioDX Жыл бұрын

The bit of capacitance helps to bring down the SWR on the higher HF bands, 15m and above

@1shARyn3 Жыл бұрын

@@HamRadioDX ok, I see it. Thanks

@MrTalaue Жыл бұрын

Only a trap could electrically disconnect the part of an antenna following the trap and that only at resonance.

@chrissmart9761 Жыл бұрын

Ok. Ok. Ok cool. Ok. Yep. Mmm hmm. Ok. Ok. Well and truly. Cool. Yep. Yeayeayea. Cool. Ok. yep. Ok. Christ mate, Please be quiet and let him present!

@MirlitronOne Жыл бұрын

"If ya can't say nuttin' nice...".

@chrissmart9761 Жыл бұрын

@@MirlitronOne That was constructive criticism. I enjoyed the video and subscribed to the channel as a result. And, that was mild as KZfaq comments go. (I couldn't figure out a way to connect antenna experimentation to Hitler)

@laurie4g3v Жыл бұрын

I thought I'd be the only one thinking what the OP thought. A brilliant presentation but constant prompting, interruptions and comments by his associate tends to break focus from the presenter and one's train of thought. Just sayin...

@m0aze611 Жыл бұрын

This is one of the most fascinating subjects I've been experimenting with for quite a few years now. The great thing about KZfaq is highlighted by the excellent presentation you've put together. I came across EFHW out of needs, I have enough room for the G5RV I started out with, moving on the a multi band dipole the difficulty for me was getting the centre point high enough without raising my profile with the neighbours. A wooden mast 30 foot high needed maintaining. Fast forward a few years and I did a lot of research in the days before KZfaq. EFHW have been my antenna of choice for home and portable working - it works. Is it the best; probably not, but installing a Hexbeam would not go down well with the station master or my neighbours. Yes I'm a coward. Every day is a learning day and I'm always finding ways to improve what I have. On the question of counterpoises I took to measuring current flow in the wire. Thanks for posting 73 de M0AZE Mike

@HamRadioDX Жыл бұрын

Thanks Mike! Glad you found it interesting!

@Trent28888 Жыл бұрын

75pf works better

@jimlips 7 ай бұрын

Great info. However, please stop saying "Basically..." - this offends me. What I get from you saying basically is that the viewer is dumb, so you have to lower the explanation so that they can understand. In reality, you are using "basically" as a filler word. If you need to stop and think, just pause, but please stop saying "basically..." Thank you.

@HamRadioDX 7 ай бұрын

Sorry you got offended. Basically, I can’t do much about it.

@RingwayManchester 7 ай бұрын

Nobody cares if you’re offended. Basically, go and watch something else. Great video Hayden