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DF2BO Germany flag Germany

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I was born December 05th, 1959. With 13 I got in contact with amateur radio and in the age of 16 I got my license. I always was and still am very much interested in dx contacts. Furthermore my passion is the designing of short wave antennas. In June 2001 I founded the company OptiBeam Antenna Technologies, and nowadays OptiBeam belongs to the more well known and bigger antenna manufacturers world wide. Since May 1999 I am married to my wife Diana who also works for OptiBeam.

















-> Combined office room and shack at the OptiBeam factory with DF2BO 

-> From here the operational business is done                                                                     

-> And of course from here radio operation is performed

-> The location of the OptiBeam factory is in D-75417 Mühlacker (40 km = 25 miles west of Stuttgart)


Antenna set up at the OptiBeam Factory Station














OptiBeam OB7-20_duo at 23 meters = 75 1/2 feet

-> 7 element 20m OWA monoband Yagi

-> boom length 18 meters = 59 feet

-> gain 8.85 dBd, f/b ratio 28 dB

-> special dual driven technique which results in stable gain and pattern accross the band

-> driver cell wide spaced and driven 180 degrees out of phase (log cell) for for enhanced performance

-> drivers connected by the special loss free OptiBeam directly coupled driver feed system


OptiBeam OB2-30 at 23 meters = 75 1/2 feet

 -> 2el 30m Yagi with high Q coil shortened elements, interlaced with OB7-20_duo

-> gain 3.95 dBd, f/b ratio 20 dB

-> element length 9.30 meters (reflector) = 30 1/2 feet


OptiBeam OB8040s at 27 meters = 88 1/2 feet

-> combo of a 2el 80m and a 3el 40m monoband Yagi / interlaced on an 11.45 meters = 37 1/2 foot boom / 2 separate coaxial feed lines

-> 80m: element length 19.50 meters = 64 feet / shortened by high Q coils plus a T end loading /  

             usage of the OptiBeam 4 step multi switch system to cover SSB in three segments -each 60 khz wide-plus 60 khz on CW

-> 40m: element length 14.80 meters = 48 1/2 feet / shortened by high Q coils



=> all OptiBeam antennas see www.optibeam.de



the new OptiBeam 80m multi switch system

->this new 80m multi switch systemis installed at the centre of each 80m element, consiting of the relay box and two high Q loading coils

-> inside the relay box 3 high quality relay pairs = 6 relais in total, connected correspondingly to a defined amount of coil windings, allow a four step

    switching, 3 x SSB + 1 x CW, each segment about 60 khz wide

-> the control unit in the shack has to be connected to a 24 Volt source and a four wire cable (+ shield) has to be runup to the antenna

-> the system can handle up to 10 KW

=> see www.optibeam.de


Prosistel PST110D

-> 240 kg (528 lbs) antenna weight + 50 kg (110 lbs) mast weight and a wind load of around 5 m2 (54 feet2) are turned by the PST110D

-> the PST110D is the newest and strongest rotator in the Big Boy Rotators line, twice as strong as the famous PST71D

=> see www.prosistel.net


8424565 Last modified: 2017-11-01 15:50:17, 6831 bytes

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