ANTENTOP- 01- 2015 # 019

R3PIN Experimenters with UA6AGW Antenna

Aleksandr Grachev, UA6AGW

Credit Line: CQ-QRP # 48 (Autumn 2014), pp.: 19- 22.

There are below described experimenters with UA6AGW Antenna made by Sergey Tetuyhin, R3PIN. Sergey would like create an UA6AGW Antenna for 2- meter Band. He did not have schematic of the antenna for 2- meter Band. He made two antennas that he believed would work at the 2- meter Band. However his attempt was not successful. But Sergey during the experimenters found some unusual sides at UA6AGW Antenna. Both antennas were made accordingly schematic shown at Figure 1.

Experiment # 1

Design of the Antenna

First antenna made by R3PIN is shown at Figure 2.The antenna was made as a table design. Height of the antenna was 45- cm. Loop of the antenna had diameter 13- cm. It was a copper tube in 8- mm OD. To make a "copper tube coaxial cable" inside of the tube was inserted plastic with central copper wire that was got from a piece of an old 50- Ohm coaxial cable. Plastic with central copper wire was in 2.5- mm diameter. Coupling loop was made from the same copper tube. Coaxial cable was soldered straight away to the coupling loop. Coupling loop had no electrical connection to the loop of the UA6AGW Antenna. Figure 3 shows coupling loop at UA6AGW Antenna.

Antenna whiskers had telescopic design. The whiskers may be moved along the antenna loop by screw clamps. Capacitors C1 and C2 were Air- dielectric with capacitance 8- 140- pF. Figure 4 shows the whiskers and capacitors.

Figure 1 UA6AGW Antenna

Figure 2 First Experimental Antenna made by R3PIN

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