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This site is dedicated to the RD3A (ex RD3AF)participation in russian and international HF-contests, DX'ing, DX'peditions, to his work from primary and secondary contest locations, to antennas, equipment and software used by him.  



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Contest loc. in EA8 - Development plans of the contest site

DEVELOPMENT PLANS OF CONTESTS POSITION EF8M EF8M

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Currently, the contests position is used about 14 antenna masts for wire antennas and «Yagi». Five towers are mounted on a small portable trailer with outrigger, with tubular or tower sections. The remaining towers are mounted on the X-shaped supports.
The antenna system is divided into two groups. Antennas for Europe and Africa are located in the eastern part of the position, and antennas for the North and South America - in the western part. In both cases, the topography of the position (ie, steep slope in the direction of America, Europe and Africa) is used to improve the antenna parameters without the need for high mast.
For the bands of 10, 15 and 20 m there are 2 groups of antennas «Yagi», one for Europe and Africa and one for America.
Three capital mast located on the eastern slope to the west of the house OH1RY. These telescopic mast height from 8 to 10 meters of reinforced pair wave channels: 4-element in the range of 10 and 15 m and 3-element in the range of 20 meters to Europe and Africa. Three-pronged wire wave channel at 40 m is located on the roof of the house. All of these antennas are below the crest of the hill, so that the signals from American stations additionally suppressed due to the terrain.
Similarly constructed wave channels for America, which are currently installed on the aluminum masts, mounted on trailers, which are located on a hill around the entrance to the station. Three-pronged wire wave channel at 40 m is stretched a boom mounted on the trailer tower, located on the top of the bunker.
Three-element wire wave channels at 80 m and stretched into different directions, using aluminum mast height 15 ... 20 m, mounted on the X-shaped base. Similarly, the strained three-element wire wave channels at 160 m..
The further development of the antenna farm contests position EF8M be focused on increasing the stability of antennas to wind loads and salt-rich environment, reducing the angle of radiation of antennas by using the stack of antennas on the ranges of 10, 15 and 20 meters, using separate groups of antennas for the North and South America, active use of the receiving antennas Beverage at low frequencies, the installation of backup antennas and antennas with broad radiation pattern.



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