I am considering this antenna for my new FT 450D 100 Watt radio with built in tuner. This is expensive $180 w/shipping. Atop my tower 70 feet slopping down to about 40 feet.
Orientation is either E BY NE TO W BY SW (aprox 70 deg NE) OR W BY NW TO E BY SE (aprox 120 degrees E)
I am very open to alternatives both antenna and direction, but because of clear area among trees a center fed dipole will be in the trees. . This antenna will be across a metal roofed building with either layout and at about tree top height.
http://www.hyendcompany.nl/antenna/multiband/product/detail/3/HyEndFed_5_band_10_15_20_40_80_M
Hello,
I remember seeing a review of it on Youtube. The guy was pretty happy about the performance.
https://www.youtube.com/watch?v=kGyAveQsf60 (https://www.youtube.com/watch?v=kGyAveQsf60)
It's just a transformer on a toroid core mind you, easy to do. See: http://earchi.org/92011endfedfiles/Endfed6_40.pdf (http://earchi.org/92011endfedfiles/Endfed6_40.pdf)
Gil.
Actually what Hyend has there is more like a 200W version of the LNR Precision EFHW. It probably has a broadband 64:1 (8:1 turns ratio) transformer, possibly with that magic capacitor across the primary side. Reviews look great.
From what I've read, using an endfed as a sloper gives you a small amount of gain (<3dB) in the direction the base is pointing at. The gain is so small that I wouldn't worry much about orientation.
It's got great reviews, and most of use here love EFHW antennas. I approve.
Sounds kind of pricey for what it is. Could probably build it for a small fraction of what it cost. I know the Off C3enter Fed Dipoles are very expensive, but I built one with a dual core Guanella 4:1 current balun that will handle at least 1KW and probably got 50 bucks in the whole thing including the parts to build the balun ! Covers 80, 40, 20, 17, 12, 10, 6, and 2 meters without a tuner except the upper end of 80 and 10 meters.
Yeah, their antenna Is a little pricey, but you're paying for their secret sauce. It's the first no-knob efhw coupler that covers that broad range of frequencies. I've designed a few and couldn't get close to covering 80-10.
Quote from: cockpitbob on December 09, 2015, 10:01:47 AM
Yeah, their antenna Is a little pricey, but you're paying for their secret sauce. It's the first no-knob efhw coupler that covers that broad range of frequencies. I've designed a few and couldn't get close to covering 80-10.
Maybe I should start building and selling off center fed dipoles, they are getting about 6 times what I have in mine !
Quote from: Lamewolf on December 10, 2015, 10:53:00 AM
Quote from: cockpitbob on December 09, 2015, 10:01:47 AM
Yeah, their antenna Is a little pricey, but you're paying for their secret sauce. It's the first no-knob efhw coupler that covers that broad range of frequencies. I've designed a few and couldn't get close to covering 80-10.
Maybe I should start building and selling off center fed dipoles, they are getting about 6 times what I have in mine !
I have a feeling making money in ham radio is like several other things people have a passion for. The old joke is that to make a small fortune in the business you first start with a large fortune, then know when to stop :D
Quote from: cockpitbob on December 09, 2015, 10:01:47 AM
Yeah, their antenna Is a little pricey, but you're paying for their secret sauce. It's the first no-knob efhw coupler that covers that broad range of frequencies. I've designed a few and couldn't get close to covering 80-10.
Is it actually a "no tuner needed" or does it require a tuner to do what it claims ? Gotta read the fine print ! A lot of this stuff is tested under lab conditions by modeling it on a computer, but remember that we live in the real world ! Is that "secret sauce" anything like SWR grease ? :o
The way I read it, no tuner needed. It's an improved version of the LNR EndFedz.
I think their secret is a standing wave hypoid bearing. Or maybe it's the transformer core made from prefamulated amulite. Unless, of course it's that the main winding was of the normal lotus-o-delta type placed in panendermic semi-boloid slots of the stator; every seventh conductor being connected by a non-reversible trem'e pipe to the differential girdlespring on the up-end of the grammes. (See the Turbo Encabulator (https://www.youtube.com/watch?v=rLDgQg6bq7o) for full details.) (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/ROF_LMAO_zps503195e3-1.gif) (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/ROF_LMAO_zps503195e3-1.gif)
Quote from: cockpitbob on December 22, 2015, 10:17:50 AM
The way I read it, no tuner needed. It's an improved version of the LNR EndFedz.
I think their secret is a standing wave hypoid bearing. Or maybe it's the transformer core made from prefamulated amulite. Unless, of course it's that the main winding was of the normal lotus-o-delta type placed in panendermic semi-boloid slots of the stator; every seventh conductor being connected by a non-reversible trem'e pipe to the differential girdlespring on the up-end of the grammes. (See the Turbo Encabulator (https://www.youtube.com/watch?v=rLDgQg6bq7o) for full details.) (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/ROF_LMAO_zps503195e3-1.gif) (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/ROF_LMAO_zps503195e3-1.gif)
uuhhhhh, wut?
Quote from: cockpitbob on December 22, 2015, 10:17:50 AM
The way I read it, no tuner needed. It's an improved version of the LNR EndFedz.
I think their secret is a standing wave hypoid bearing. Or maybe it's the transformer core made from prefamulated amulite. Unless, of course it's that the main winding was of the normal lotus-o-delta type placed in panendermic semi-boloid slots of the stator; every seventh conductor being connected by a non-reversible trem'e pipe to the differential girdlespring on the up-end of the grammes. (See the Turbo Encabulator (https://www.youtube.com/watch?v=rLDgQg6bq7o) for full details.) (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/ROF_LMAO_zps503195e3-1.gif) (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/ROF_LMAO_zps503195e3-1.gif)
No, the core is made of unobtainium !
This month's QST magazine does a 2 page write-up on the Hyend 80-10 meter EFHW antenna. Basically, it works and the losses are so low they really couldn't measure it accurately.
Like I said, I've designed several of these things but I never got this wide a frequency range or high power handling. (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/Bow_zps5e1f4f3c.gif)
Quote from: cockpitbob on February 17, 2016, 10:19:58 PM
This month's QST magazine does a 2 page write-up on the Hyend 80-10 meter EFHW antenna. Basically, it works and the losses are so low they really couldn't measure it accurately.
Like I said, I've designed several of these things but I never got this wide a frequency range or high power handling. (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/Bow_zps5e1f4f3c.gif)
What type of coupler are you using Bob and what ratio ? I've experimented with a lot of baluns and ununs and can get a very wide frequency range with them, but they are a fixed ratio of course.
Quote from: Lamewolf on August 04, 2016, 08:08:11 AM
Quote from: cockpitbob on February 17, 2016, 10:19:58 PM
This month's QST magazine does a 2 page write-up on the Hyend 80-10 meter EFHW antenna. Basically, it works and the losses are so low they really couldn't measure it accurately.
Like I said, I've designed several of these things but I never got this wide a frequency range or high power handling. (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/Bow_zps5e1f4f3c.gif)
What type of coupler are you using Bob and what ratio ? I've experimented with a lot of baluns and ununs and can get a very wide frequency range with them, but they are a fixed ratio of course.
I'm using a home-brew wide band transformer 3 turns & 21 turns (49:1 impedance ratio). At 28MHz it is a little big and the parasitics get in the way. At 3.5MHz and 100W there's too much flux in the core and it saturates. I could have used a bigger core and gotten 3.5MHz but the larger parasitics would have lowered the top end.
Quote from: cockpitbob on August 04, 2016, 08:27:09 AM
Quote from: Lamewolf on August 04, 2016, 08:08:11 AM
Quote from: cockpitbob on February 17, 2016, 10:19:58 PM
This month's QST magazine does a 2 page write-up on the Hyend 80-10 meter EFHW antenna. Basically, it works and the losses are so low they really couldn't measure it accurately.
Like I said, I've designed several of these things but I never got this wide a frequency range or high power handling. (http://i120.photobucket.com/albums/o170/cockpitbob/Emoticons/Bow_zps5e1f4f3c.gif)
What type of coupler are you using Bob and what ratio ? I've experimented with a lot of baluns and ununs and can get a very wide frequency range with them, but they are a fixed ratio of course.
I'm using a home-brew wide band transformer 3 turns & 21 turns (49:1 impedance ratio). At 28MHz it is a little big and the parasitics get in the way. At 3.5MHz and 100W there's too much flux in the core and it saturates. I could have used a bigger core and gotten 3.5MHz but the larger parasitics would have lowered the top end.
I figured a high ratio, but on those you lose at one end to get the other. I've played with the transformers some and could never get them to work the way I wanted them to. Are you using ferrite cores - 43s or 61's or powdered iron ? I'm thinking of playing with some using powdered iron because they don't saturate as easy, that is if I ever get time to do so.
Lamewolf please quote a minimum when replying to posts, thanks! Much appreciated :-)
Gil
Quote from: Lamewolf on August 04, 2016, 08:49:22 AM
I figured a high ratio, but on those you lose at one end to get the other. I've played with the transformers some and could never get them to work the way I wanted them to. Are you using ferrite cores - 43s or 61's or powdered iron ? I'm thinking of playing with some using powdered iron because they don't saturate as easy, that is if I ever get time to do so.
Ferrite. -43 material. I forget the core size, but I stacked 2 toroids together to get the inductance up with only 3 turns on the primary. It's very flat and low loss at 100W from 7MHz past 21MHz but starts to fall apart after that. I like wide band transformers for EFHW antennas simply because they don't have to be tuned for the frequency you use.
"... It's very flat and low ..."
Gee, just like my ex-wife's forehead.
(https://images.booksense.com/images/050/873/9781936873050.jpg)
Quote"... It's very flat and low ..."
Gee, just like my ex-wife's forehead.
That's what she says too.. ;D
(https://pbs.twimg.com/profile_images/585865343999946752/TFSSMbfm.jpg)
Gil.
I have to admit that when I hear "no tuner needed" on a non-resonant antenna, I always raise an eyebrow...
Too many antennas used with 100W actually only radiate a few Watts.. Everyone touts their horns about them, they work great!.. No, QRP works, many "magic" antennas suck.
Gil.
Too many antennas used with 100W actually only radiate a few Watts.. Everyone touts their horns about them, they work great!.. No, QRP works, many "magic" antennas suck. <snip>
Yeah, feed line loss due to mismatch on the feed line, losses through a balun or unun, losses through the tuner, and losses due to the antenna being too short all add up. A loss of 3db is half your power and I'm sure some of these antennas exhibit losses greater than that ! A mobile whip that is tuned to frequency can exhibit efficiency levels of 10% to 15%, so you know how lossy and inefficient a non resonant mobile size antenna can be !
Hello to all interested on HEF Antennas. Some ears ago i had a mobile QSO on 40m wid a DL Stn that sounds like a STN wid a bit mor pwr than 100 Watts. i asked him an he answered that he is experimenting wid an 1:64 HF trafo and END FED Antenna. now, some weeks ago i was remembering that QSO and orderd at communicationsworld.nl a home brewer set wid all what is needed for around 38 Euros. my exemplar has a FT-140-43 and a (i think 120uH= coil near the antennas end. Is around 23m long, the coil makes a 1/2 wave for 80m.
Antenna is hangig from the roof to 12m high into a tree. With an MFJ 259 i "tuned" the wire to have all minimums for the classic Bands inside. And later on wid around 12m Koax the SWR's a bit "better". Can use this antenna also on 10Mhz wid using the internal Tuner of the IC7300. Most of the time the S-Meters gives around one S unit more than the 2 x 16,4 m Dipol with ladderline, feedet at same height, but wors as Invertd V. The HEF has also around one S Unit lower noise. So i've a gd 10dB better SNR.
Yesterday i played wid the new K2 and made 2 SSB-Contacts wid 5W - both wid Italian Stations. One gave me S9 the other S8 and an etremly gd audio report (used the build in Mike). So i'am deply contented wid that nice cheap home brew Antenna. Have orderd an other one wid FT-240-43 Toroid and will try a "short" vertical for 20/40m - around 10m wire wid a smal coil on a fiber mast.
73 Juergen
Half-wave end-feds are awesome. A coil would be better in the middle, but is more practical at the base. A half wave wire, fed at the end or anywhere else will beat everything else but a beam antenna. The only thing about as good is a large enough magnetic loop.
Gil
OP,
build your own. More fun... I build one from the link provided by Gil. Came about 42 buck and had a great time putting it together.
Xicaque, welcome to the forum!