ANTENTOP- 01- 2007, # 009

UR5WCA Balcony Antenna for 7, 10 and 14

By: Valeriy Prodanov, UR5WCA

ur5wca@ukr.net

Credit Line: www.cqham.ru

As I am an urban resident I have not a sufficient place for my antenna. My balcony placed at 2- floor at 5- store building is my sole antenna polygon. So, I have done a balcony antenna for my favorite 7, 10 and 14 MHz- ranges. It is a helical vertical that can be matched for these bands. Figure 1 shows the view of the antenna.Figure 2 shows the schematic of the antenna.

 

Design of the antenna:

 

- Two verticals were made from PVC tube in 5 centimeters diameter.

 

- On length of 1.35 meter of each tube were

coiled 11.5 meters of insulated copper wire in 1-

mm (18 AWG) diameter

 

- Distance between the verticals is 1 meter

At antenna clips an ATU (see References 1) was used with the antenna. Figure 3 shows the picture of the ATU. ATU (between coax and transceiver) is a must for the antenna.

 

Figure 1 UR5WCA Balcony Antenna

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