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Reviews Categories | Antennas: HF Directional: Yagi, quad, rotary dipole, LPD, etc | EA Antenna 15 MDY 4 Help


Reviews Summary for EA Antenna 15 MDY 4
Reviews: 3 Average rating: 5.0/5 MSRP: $(missing—add MSRP)
Description: 4 element monoband yagi for 15m
Product is in production.
More info: http://www.eantenna.es/2013/04/nueva-eantenna-15mdy4-4-el-2102145-mhz
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EA7KW Rating: 5/5 Oct 18, 2013 04:36 Send this review to a friend
Great Stuff  Time owned: 0 to 3 months
Easy to assembly, manual for dummies-proof. No need to adjust. SWR flat all along the band. Excellent performance!
 
EA7KW Rating: 5/5 Oct 18, 2013 02:10 Send this review to a friend
Good stuff  Time owned: 0 to 3 months
We just finnished setting this baby at 18 metres high fixed to NA. Easy and dummies-proof assembly. All came as it is in the manual. Didn't need to do any adjustment, as it has a flat SWR curve along the band (1:1,2 at the very lower of the CW segment - 1:1 till the end). Hard to find differences with larger beams, gain and front to back figures are excellent, as expected.
 
GM7CXM Rating: 5/5 Jun 27, 2013 11:22 Send this review to a friend
Solid monobander  Time owned: 0 to 3 months
We use two of these antennas stacked vertically on the same tower at the ED5T contest station. The decision to go for this 4 element design was based on good specs for contesting (gain, F/B, beamwidth), and easy to side mount on the tower (space between driven element and first director). I have known and done business with owner Rod EA7JX for many years now, since apart from EA antenna he also owns HAMRADIO.es (www.hamradio.es). So, it wasn’t a hard choice.

The antennas come well packed and are easy to assemble for anyone who has a bit of antenna building experience. Complete illustrated instructions and parts list are provided. Our models were not provided with a balun (our choice, we were in a hurry to install) and were installed with a coax choke, however normally they are provided with a 3kW balun. Aluminium quality seems very good, we like the square boom to keep elements aligned and small touches like the embedded-head stainless steel screws used in the element joints.

Once installed using the recommended setting on the driven element, there was no need to retune. The antennas both showed a wide bandwidth with low SWR on the antenna analyser. We did have some interaction with the top antenna and the 40m yagi installed above it, which was cured by moving the antennas 90 degrees on the mast.

The key question: how do they work? First tests were done using the top antenna (at 15m) high, compared against our 11 element Optibeam tribander (at 22m high) and in general the monobander was usually slightly better. However the setup used will give us more advantage than just a straight few more dB in one direction, affording us these few dB over a wide bandwith and on a nice beamwidth. By using two of them, we will also have much more flexibility. And finally, a real plus in our particular case is the much lower interstation interference in a multi-station contest environment. In short, this is just what we were looking for!

A photo gallery is available on my website at http://www.ea5on.com/2013/06/stacked-antennas-our-new-4-over-4-stack.html
 


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