|I ordered this nice Beam during the HAM-Radio 2019 after a very interesting and fruitful discussion with Tom (DF2BO, owner of OptiBeam). I could pick up it then few days later at the shop floor in Mühlacker. I got the chance to visit Tom’s production. And I can tell you, very professional, clean and well organized!|
All parts were well packed in the right length, especially for transport in my shooting brake and signed/prepared for assembly. Tom and his team did an excellent job!
The description in the Installation Manual was very detailed, structured and comprehensible, incl. many pictures. All parts were available, in a high quality and nothing has been missing. I needed several days for assembly with short interruptions.
Now, after assembly, the most important thing … first test and first qso …
Based on my measurement, the swr on all bands is ok. The swr was never worst than 1 : 1,3. Except above 29,4 MHz. Between 29,4 and 29,7 MHz the swr is more than 1 : 2,0. But who is using FM on 10-m with a Beam???
Means, it is very easy to assembly this antenna w/o any tuning activities.
Now some words to the performance of this antenna. I could compare this “OB10-5M” with a “FORCE 12 5BA” Beam on 20-m. The Force 12 was installed in 18 m height and my OB10-5M in 10 m height. The distance between the Force 12 and the OptiBeam was approx. 10 km. Both stations (located around Stuttgart/Germany) had a qso with the States (with N2II) with the same output (750 Watt). I got with my OptiBeam a “57” and my friend with the Force 12 a “58 - 59”. But you have to take into account two things: 1. the Force 12 is on 20-m a 3 element Beam (I guess) and the OptiBeam is on 20-m a 2 Element Moxon and 2. please consider that the Force12 antenna is installed almost double the height compared to my OB10-5M.
Therefore, I guess that at the same height (means, 18m for my OB) the dx-signal-difference between the two antennas would be the same, which more counts for this little compact antenna.
At the end I can highly recommend this very nice antenna, especially if you have a “restricted airspace”. The support from the vendor is excellent and the reaction on questions (via email) is very fast.
If you have any additional questions, you can ask me: email@example.com
73 de Dirk (DK1DKE)