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write your own review of the Alpha Delta DX-EE.
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KI6EQW
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Rating: 4/5
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Jan 24, 2010 17:59
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Alpha Delta DX-EE
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Time owned: 0 to 3 months
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Put up the antenna today. It is in an inverted "V" configuration with the apex at 25'. I've got a Diamond A-50X on top of the 10 ft. TV tower bolted to the side of the garage. The unit was built as per the AD instructions with no attempt to tune, and fitted to be tight to support the mast. SWR is in the 2.5 to 3.0 range for 20M and 40M, and below 2.0 for the other freq's. I had always intended to put an LDG-AT200 in line with the antenna, so the SWR is OK. The antenna is much louder than my vertical, so I must have done something right. No complaints. a robust, and heavily constructed antenna.
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GW6VET
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Rating: 5/5
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Sep 29, 2009 05:31
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Better than I ever expected
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Time owned: 3 to 6 months
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Having used the DX-EE for a few months now I thought I would update my previous report on the DX-EE mounted in the roof space of my house.
I am now using a Yaesu FT-450AT and the DX-EE tuned up OK on 20-15-10 with the internal ATU. However, I had to trim a few inches off the DX-EE to get it to resonance on the phone portion of the 40m band.
From my home QTH in South Wales, UK, I have had recent SSB 20M contacts in Asiatic Russia, Madagascar, South Africa, Los Angeles (5300 miles) and Sao Paulo, Brazil (5800 miles)
Many contacts have large Yagi antennae and they are consistently surprised when I say that I have a dipole in the roof space.
I was happy before; now I am even more so.
73s
John
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N6IFR
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Rating: 5/5
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Jul 14, 2009 08:41
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Very satisfied
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Time owned: 0 to 3 months
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Purchased the DX-EE a day before IARU contest as a back up antenna for 40 meters. My Cushcraft A4S 40 meter hats had fallen off and didn't get the parts in time to fix it for the contest. It took me all of 2 1/2 hours to assemble and about another hour to put up. I used a 20 foot aluminum pipe mounted in a vent pipe on my roof. I shortned the ends for 40, did not cut just pulled thru per the instructions for ssb operation. Testing the antenna on 20, my first contact was with a ZL station. Curious to see the difference I switched to my A4s during our qso and was given a report 2 s-units less than the DX-EE. Of course you never know with band conditions but very happy with the performance. I ended making about 60 contacts on 40 mostly US stations but I did make contacts with stations in Hawaii, Brazil and Morocco! Don Tyrell at Alpha Delta was very helpful and received quick responses with questions I had.
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K4XZ
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Rating: 5/5
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Apr 9, 2009 19:44
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WORKS WELL
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Time owned: more than 12 months
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I ran one of these before I put up the tower and beam.It worked very well. I still keep it as a back up antenna.
73 Joe K4XZ
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KB1RJK
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Rating: 5/5
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Apr 9, 2009 14:52
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New ham, but I've listened to the world on this antenna!
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Time owned: 6 to 12 months
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I have it mounted from the house to the detached garage, sloping down at 10 degrees. I don't have may years of experience as a ham, but consistently listen to Europe, all of the US, and many early mornings I've heard from our friends Down Under. Does it get better than that?
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KA5TCF
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Rating: 5/5
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Mar 31, 2009 05:35
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Outstanding Attic Dipole
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Time owned: 3 to 6 months
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I have the DX-EE mounted in an inverted V in my attic. The peak is at about 30 ft and the ends are at 22ft (pretty tall roof line on a two storty house). After tweaking the 10, 15 and 40m wires, I have less than 3:1 across the entrire phone portion of the General License Band allocations such that my Ft-950 internal tuner will tune the antenna to less than 1.3:1. This is in spite of the many metallic objects in my attic (wiring, 2 HVAC units, hot water heater, large AC ducts running everywhere, ect). In 3 months on the air, I have worked all 50 states and 49 countries using 100W. It is true some of the DX is a struggle, but I have also had long S9 QSOs with Italian, Alaskan, and Even the South Pole Station on 20 and 40 meters. The only continents I have not worked are Asia and Australia. This has far exceeded my widest dreams on what I could do given the Antenna restrictions at my QTH. If you check out my QRZ profile, you will see a picture of the antenna in my attic. This thing really works.
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W6ANF
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Rating: 5/5
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Mar 16, 2009 08:12
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Great in attic
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Time owned: more than 12 months
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I've now had this antenna for about a year. I must admit I had reservations about putting it inside my attic and perhaps it would perform better in free space, but after making contacts in both France and Italy this past week from Colorado, with only 100 watts, and the antenna in the attic, I'm sold on it! Sure, I'd love a monster beam atop some huge tower, but if an external antenna is not an option for you, I'd give the DX-EE a shot.
After first putting it in the attic, I had full bandwidth on 20m, 15m and 10m. I found that 40m only had about a 50KHz bandwidth, which the specs predicted. It was too low in the band for what I wanted. It only took two tries though to shorten the 40m element by folding over the ends (you don't have to cut it) to raise the center frequency into the general class phone portion of the band, and now it works great!
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K6YLG
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Rating: 5/5
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Mar 9, 2009 10:08
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Way better than G5RV Jr.
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Time owned: 3 to 6 months
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Living in a CC&R subdivision, I've tried a variety of HF attic antennas, and this one is by far the best. I previously used a G5RV Jr, but it was effectively a monobander--20 meters only; sure, you could tune it up on other bands with a tuner, but the SWR was horiffic, so ERP was miniscule. This one displays 2:1 or better on 20/15/10. The only proviso is the response curve on 40 is VERY sharp; clipping 3" from the ends raised the tuning null 150 KHz. But once tuned, it works great there, too. I've worked 20 countries so far with it on QRP, so I'm definitely a fan.
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VA7CPC
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Rating: 4/5
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Nov 24, 2008 17:57
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Very nice above 40m, and good for an attic
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Time owned: more than 12 months
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I got this antenna when I was starting out with HF, and had it about 20' off the ground over my garage in 2003.
It gave me my first taste of DX work on 20m. 40m performance was not very good, and I never really tried it on higher bands.
A few months ago I moved into a townhouse with severe CC&R restrictions -- but I have an attic. So it's up there now, with household wiring, metal rain gutters, and alarm wiring. It's in a "Z" -- the only way it fits. My household (and my neighbors) is as electrically noisy as any other.
I have an LDG Z-100 Pro autotuner in the attic, with a 10' coax run to the feedpoint. Another 50' of coax goes from the tuner to my rig.
In spite of all the clutter and RFI, the DX-EE gets out OK on 20m and 15m with 100 watts (50 watts with PSK31). Not as well as it did when in the clear, but well enough for me to work contests and get some DX, both on phone and RTTY.
It's weak on 40m -- stations coming in at less than S7 find it hard to hear me on phone. But it's only 40' long _when it's straight_, so it's working as well as I can expect.
It got from Vancouver BC to Venezuela, on 15m SSB last weekend. And I worked 40 sections in a few hours, all over North America, in the ARRL SSB Sweepstakes. It's doing its job well.
I might give it a "5" if I had it 50' high, in the clear. But I'll rate it as I actually see it work, in my severely compromised environment.
Charles
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DXSHORTWAVE
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Rating: 5/5
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Nov 24, 2008 10:41
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Great DX, easy to tune
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Time owned: more than 12 months
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I have worked well over 100 countries with my DX-EE at only 30 ft. It is an inverted-V and nothing is around it. Easy to tune on all bands. Sounds like the previous reviewer doesn't know how to trim a dipole. If it's too low on 40 meters, just shorten the ends a few inches at a time and re-check the SWR. Sounds like the other bands are affected by all his other antennas around it. The DX-EE is a great DX performer and very efficient. No problem at all if you understand dipoles and the requirements for HF antennas.
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