ANTENTOP- 01- 2012, # 016

Ground Plane for the 40,-30,-20 and 17- meter Bands

Table 1 shows data for the matching unit. All inductors are coiled by wire in 2- mm diameter (12- AWG). Inductors are air- winding. Diameter of each inductor is 40- mm. Gap between coils is 3- 5-mm. The gap should be defined at the tuning of the antenna. High- voltage ex- USSR capacitors K15U-1 are used in the matching unit.

Vacuum ex- USSR relay V1V did switching on the matching circuit. All matching circuits were sitting in aluminum box by dimension 330x200x130- mm. Figure 3 shows the design of the box. (There are matching circuits for the 80/75- meter Band inside the matching box. However, the antenna could not provide satisfaction operation on the bands. So I did not use the antenna on the bands)

Ground Plane. General view

Table 1 Data for parts for the matching unit

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