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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 OBLY19-5 at 23 meters = 75 1/2 feet

-> 19 elements / five band 20-17-15-12-10m high performing Log Yagi / fed by a single coaxial feed line / close to 4el monobander performance

    on all five bands / parasitic reflector on 20m + parasitic duoband director on 10-12m (also partly works on 15m) / 17el arranged in terms of

    a high gain wide spaced logP array / boom length 15.00 meters = 49 1/3 feet

    (normally it is a 20el design, this 19el system here at DF2BO is a special case to interlace the 30m reflector)

=> while usual logPs do not have enough elements on too short booms and use a lossy high impedance phase line

=> OptiBeam Log Yagis (diverse models are available) have

     - a high design factor (low per centage of length difference between the elements) = many elements

     - a biger distance factor = wider spacing

     - a gain enhancing, loss free, low wave resistance phase line

     - performance enhancing parasitic elements with an optimum spacing from the logP array

     - absolute stability regarding gain and pattern accross all bands + low SWR


OptiBeam OB2-30 at two levels: driven element at 25 meters = 82 feet / reflector at 23 meters = 75 1/2 feet

-> 2el high Q coil shortened 30m monoband Yagi / driven element in between the OB8040s and the OBLY19-5 /

     reflector interlaced at the rear of the OBLY19-5 boom (for optimum take off and lowest SWR)


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 18.40 meters = 60 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



=> 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


7354894 Last modified: 2016-06-02 07:54:23, 8216 bytes

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