Langenberg - Rommel MW diplexer   4EN
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MW Langenberg 720 kHz - antenna tuning hut
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.
Below: The design of the antenna tuning unit in two parts:
The realization of the design below:
In the center: the glass feed through insulator from inside.

On the right the HFD25- feed through insulator from inside.
Tuning elements
Tuning elements
Switch
HFD25- feed through insualtor

Current transformers (indication of current) and energy supervisor (ELW) (indication of power, current and voltage)
Rejection filter for 1440 kHz (2f ), the frequency of Radio Luxembourg
Systematic indication of operational options:
Day and Night pattern.

Indication of power, currents and phases.
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