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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                     ->  The world's best 8 band antenna set up on a 36 meter/120 feet high rotating LUSO36XXEU

-> From here the operational business is done                                                                     at OZ8X: OB804030x / OB21-3 / OB9-2WARC at 36,00 / 27,70 / 19,50 meters

-> 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 OB16-3W at 23 meters = 75 1/2 feet

-> 16 elements / tri band 20-17-15m interlaced multi monoband system / commonly fed by a single coaxial feed line / 4el on 20m, 5el on 17m, 7el on 15m /

    boom length 11.10 meters = 36 1/2 feet


OptiBeam OB2-30_special at 25 meters = 82 feet

-> 2el high Q coil shortened 30m monoband Yagi / wide spaced on 4.60 meters = 15 foot boom


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 19.00 meters = 62 1/3 feet / shortened by high Q coils plus an end T-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


top fed L antenna for 160m alongside the tower

-> the vertical part runs down from 23 meters = 75 1/2 feet to 4 meters = 13 feet / the horizontal part then runs accross the court in front of the building


OptiBeam OB8-2W on second tower at 14,50 meters = 48 feet

-> 8 elements / duo band 12-10m interlaced multi monoband system / commonly fed by a single coaxial feed line / boom length 7.50 meters = 24 1/2 feet

     - 2el on 12m (driver-reflector) + additional radiation from the 10m directors in front  =  4el monobander performance

     - 6el on 10m (driver-reflector-4 directors) =  5el monobander performance (given by this active boom length)


Four OptiBeam Yagis on two towers at the OptiBeam factory

(big antennas, poor location, in a valley, surrounded by industry)




=> 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


6752949 Last modified: 2015-10-03 06:58:40, 8040 bytes

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