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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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Antennas on loc. RA3 - 40 m band antennas


40 M BAND ANTENNAS

From December 2009 to the position put into operation a new multi-band antenna system installed on a free-standing tower height of 82 meters. Three 5-element antennas "Yagi" in the range of 40 meters can be remotely controlled to work as a stack with a focus on the USA, as well as separately. Upper antenna stack on the range of 40 meters rotating.

Previously been used in this direction stack antennas "Yagi" (2x4 elements) was redirected to Japan, which enabled the simultaneous work effectively stacks of antennas on the two most preferred direction - "US-Japan" and, if necessary, by rotating the upper antenna stacks work in one or two additional directions, depending on the specific conditions of competition and the conditions of propagation .

Third, a rotating two-element antenna "Yagi", allows (in some cases) with a large work more efficiently with reporters in the nearby areas of communication.


1b.jpg

Multiband antenna system: the dipole on the range of 160 m, a stack of two 4-element antennas "Yag" the range of 80 meters, a stack of three 5-element antennas "Yagi" in the range of 40 meters.

2b.jpg

Multiband antenna system.

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3b.jpg

Stack of three 5-element antennas "Yagi" in the range of 40 meters in the direction of an azimuth 315 degrees.

 

1 40mb.jpg

Left to right:

a) 2-element antenna "Yagi" on a band 40 m;

b) stack of two 4 element Yagi antenna at a band of 40 m with an azimuth of 55 degrees of radiation. Top antenna in a stack of antennas - rotating. There is a possibility for remote activation of antennas in a stack in any combination.

2 40mb.jpg

2-element antenna at a band of 40 m.

 


3 40mb.jpg

Stack of two 4 element Yagi antenna at a band of 40 m with an azimuth of 55 degrees of radiation.

4 40mb.jpg

Upper, rotating antenna stack antennas "Yagi" on a band of 40 m.





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