ANTENTOP- 01- 2007, # 009

UR5WCA Balcony Antenna for 7, 10 and 14

The measurement was made at distance 5 meter far the antenna. At antenna clips an ATU (see References 1) was used with the antenna. ATU (between coax and transceiver) is a must for the antenna.

 

After numbers tests I did another modification.

 

1. Each vertical contains 20.2 meters of insulated copper wire in 1.5-mm (15- AWG) diameter.

 

2. The coils (see Figure 4) were deleted and verticals were connected straight away to pre ATU (see Figure 5).

 

3.           A counterpoise (I used metal balcony hand-rail) was used with the antenna.

 After this modification noise level decreased, SWR was not changed. ATU (between coax and transceiver) is a must for the antenna. With the antenna I did some DX QSOs, for example, with KH0DQ (10-MHz, 589 to me) and 5Z4LS (14-MHz, 599 to me).

 

Conclusion: Of course, it is only a surrogate antenna, but the antenna is worked, and works not bad.

 

References:

 

1.     http://www.qsl.net/gw6hmj/antenna.htm

Figure 4 Modification of the UR5WCA Balcony Antenna

Figure 5 ATU of the UR5WCA Balcony Antenna

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