On Sunday, I decided to install and test an antenna of the End Fed antenna for two ranges: 7 and 14 MHz. This is what came of it ...

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Yesterday, walking in the area of the Voronya and Orekhovaya mountains, he met a familiar radio amateur who shot a summer cottage with his family there. He promised him to tell about the KV Antenna W3EDP.

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In amateur designs of the antennas of the VHF range, a split half -wave vibrator is often used. The manufacture of the power supply units raises questions.

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На работе мне подарили "новый" роутер ADSL. Из полезного в нём - блок питания на 19 вольт и антенны.
Разобрал антенну (роутер заявлен как двухдиапазонный 2.4 и 5 ГГц), чтобы посмотреть конструкцию...

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Несколько лет назад я изготовил 2 небольших антенны диапазона 70 сантиметров, с числом элементов 5 и 7. Попытка установить радиосвязи на расстояние 35 километров показала, что антенны 7 элементов не хватает для уверенной связи.

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The proposed antenna is useful for transportation in the trunk of a car in a collected form - dimensions: 1000 x 980 mm.

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Most 6 -element antennas per range of 144 MHz suffer in one drawback - the length of their traverse is more than 2 meters.
But the square profile and pipes in the store have a length of 2 meters smoothly.
I calculated the compact (1.96m length) antenna for the range of 144-146 MHz, 1 meter 94 centimeters long, without the need to drink or increase the traverse.

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Due to the accessibility of the balcony at the place of my stay, I decided to install the Ground Plane antenna on all amateur ranges of 7-28 MHz, and, if possible to configure, then at 3.6 MHz. The basis was taken from the article http://www.dk3red.homepage.t-online.de/de/s15_01.htm. The antenna is a fishing rod with a tuner at the base, grounding on the railing or a balcony glazing frame.

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In a radio component store, I bought a room antenna for 200 rubles ($ 3) in order to check what it is capable of taking radio waves of the VHF range.

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Dans la pratique du radioamateurisme, il est nécessaire de travailler depuis le terrain ou un parking, depuis sa voiture personnelle.

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