MW Langenberg 720 kHz - antenna tuning hut
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The antenna tuning hut has two feed through insulators. The glass feed through insulator in front is used for feeding one of the six guy ropes. The design is determind by high voltages and currents: big insulator and large cages (round and flat). Please take notice of the shaddow image.
The feed through insulator in the back (HFD25) is used for feeding the five (out of six) cage ropes.
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Below: The design of the antenna tuning unit in two parts:
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The realization of the design below:
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In the center: the glass feed through insulator from inside.
On the right the HFD25- feed through insulator from inside.
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Tuning elements
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Tuning elements
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Switch
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HFD25- feed through insualtor
Current transformers (indication of current) and energy supervisor (ELW) (indication of power, current and voltage)
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Rejection filter for 1440 kHz (2f ), the frequency of Radio Luxembourg
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