eHam.net - Amateur Radio (Ham Radio) Community

Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net


Reviews Categories | Antennas: HF Directional: Yagi, quad, rotary dipole, LPD, etc | OptiBeam OB7-2WARC. High Performance Dualbander. Help


Reviews Summary for OptiBeam OB7-2WARC. High Performance Dualbander.
OptiBeam OB7-2WARC. High Performance Dualbander. Reviews: 4 Average rating: 5.0/5 MSRP: $825
Description: German desingned high performance antenna for the Warc bands. Computer optimized with an exclusive patented feed system and full size elements. It has 4 elements active on 12 meters and 3 on 17 meters. Furthermore there is a separate director for the 17 m band and two for the 12 m band and a separate reflector for each of the two bands. Excellent high gain, bandwidth, clear pattern and low swr with unlimited power handling are achieved.
Product is in production.
More info: http://www.optibeam.de
Email Subscription
You are not subscribed to this review.

Subscribe!
My Subscriptions
Subscriptions Help

You can write your own review of the OptiBeam OB7-2WARC. High Performance Dualbander..

OH2WC Rating: 5/5 Mar 16, 2006 08:04 Send this review to a friend
Best buy!  Time owned: more than 12 months
I have been active on HF-bands more than 30 years, mostly on those traditional ones.
Some years ago I got also interested in WARC-bands.
At the same time I planned to replaced my old TH6 to another Tri-bander beam. I wanted to have a modern design, good performance and resistant for adverse wx conditions. My QTH locates not too far away from the Arctic Circle.

I made careful studies to find a suitable antenna for my demands. While hosting one of the top WRTC-teams (2002), I got very handy information and experiences of different WARC-antennas.

During the choice process, I found that Tom (designer of Optibeam) was very capable of co-operation to give the answers to my needs and questions.

Final result, OB7-2WARC from Optibeam.

It has been a success story and a great delight through more than 2,5 years.

Delivery on time, good documentation, easy to assemble and after nearly three years of operating experience (Dxing and rag chewing), all the granted electrical and mechanical performance characteristics have been fulfilled.

If you wonder, which was my choice to replace TH6? That is another story on another forum (OB11-3).

I was the first customer to buy Optibeam antennas here in Finland and so it took some time to get experience enough to say: Optibeam, highly recommended.

Need more info? Pse email oh2wc@sral.fi
 
IZ0FMA Rating: 5/5 Apr 3, 2004 10:29 Send this review to a friend
NO LIMITS  Time owned: 0 to 3 months
Together with the OB12-4 i have also in use a OB7-2WARC.
The way it must be assembled is easy like 1,2,3

Pre-assembled, robust. Low SWR and generous in bandwidht.

I consider it a "No Limit" antenna. Very efficent. Impressive gain in RX and TX.

I do consider my Antenna's Farm almost completed after this installation.
 
K1UO Rating: 5/5 Aug 2, 2003 11:29 Send this review to a friend
Provides 2 band monoband performance  Time owned: 6 to 12 months
Well I finally got around to getting the Optibeam OB-7-2WARC antenna to compliment my High Performance OB16-3 tribander. Compliment it does...excellent patterns for gain, F/B and SWR on this WARC 17/12 duobander. At first I thought something was wrong as the receive noise level for either 12 or 17 way always so low on this beam. That "worry" was short lived as I soon discovered I was hearing as much or more than the others around this area with WARC yagis!
The interlaced design of 3 full sized elements on 17 and 4 full sized elements on 12, along with the excellent coupled feed system, gives this dual band antenna monoband performance on a single boom. The Alpha 87A simply loves the solid SWR levels at no worse than 1.2:1 on either band.
Construction was a breeze, although the square boom threw me for a while! but then again the elements stay aligned no matter what. This antenna along with its cousin, the big 33ft boom OB16-3 tribander, have survived the Maine winter, complete with ice storms, with NO problems.
I recommend throwing away the provided SO-239 feed point assembly and installing the EB-2 balun in its place. The balun output has a much better fit to US made PL259's and there is much less chance for ice/snow buildup at the feed junction.
 
EA1XF Rating: 5/5 Jan 4, 2003 17:08 Send this review to a friend
: The best WARC band antenna nowdays!  Time owned: 3 to 6 months
This antenna replaces my Cushcraft A3WS. As soon as you unpack the antenna, you will see that they have developed a work of art, beginning with the element transition, and a direct coupled feed system with no losses, making the antenna the easiest one I have ever put together. Most of the antenna already comes pre-assembled, saving a lot of work and making the assembly very easy. In the manual you will also find some extra help given by some included pictures in detail. Every piece is marked and every tube will fit into the other perfectly with no need of using the tape measure. So the required lengths of the element sections are achieved automatically. This will make the antenna assembling very easy and quick, just plug and play”. The square boom is extremely solid and you won´t have to waist your time and patient aligning the elements. Even the boom marks will tell you where to place them!.

The final result is a perfect antenna looking work, meeting all the specifications given by the manufacturer. You will see real gain and a fantastic F/B and F/S. If you are looking for an antenna to add on top of you other tribander, you will love this one.. In my case, I have it 10 feet above my OB 16/3, and there is no interaction at all between them and no change on the swr curve or bandwidth on both. What a big difference compared to the previous antenna I had!.

The antenna has gone through high winds up to 65 mph several times this winter, without any damage. This confirms its strong and solid construction .

Next thing that I will do is to replace my KLM 40 M1 for the new OptiBeam 40 meters rotatable dipole OB1-40, and I will place it in between my OB16/3 and OB7-2Warc. This will complete my antenna system.

73 de EA1XF.
 


If you have any questions, problems, or suggestions about Reviews, please email your Reviews Manager.