Mainflingen MW cross dipole antenna   7EN
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MW Mainflingen cross dipole antenna -antenna tuning elements
Photos: Michael Schmolke and
Bernd Waniewski
This photo shows the interface between feeding cables and antenna tuning unit. To otain the information about the behaviour of each dipole it requires a power measuring facility for indicating the power and a current transformer for determining the phase between the dipoles.
grounding switch

power measurement and current transformer
The phase shifting of 90 degrees which is necessary for obtaining the circular polarization of the dipoles is achieved by two coils ( one of the coils L13 on this photo) and one condensor.
Coil as part of transformation unit from 37,5 ohms to 50 ohms.
Condensor as part of transformation unit from 37,5 ohms to 50 ohms.
The fixation to the cable which connects the antenna tuning hut with the transmitter.
Connecting tube between condensor and cable coming from transmitter.
Connecting tube between condensor and cable coming from transmitter.



In the background:
Wolfgang Heßler from T-Systems, head of the transmitter site in Mainflingen
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