Double J-Pole Antenna at Trevor Sandra blog

Double J-Pole Antenna. Effectively, the antenna is an end fed dipole. This step is very important, and can be made easier by the use of swr. With a 50 foot length of rg8, and the antenna 20 feet in the air, swr was a respectable 1.13:1 for the 147.780 mhz input. My understanding is a j pole is a $\frac{1}{2} \lambda$ dipole attached to a $\frac{1}{4} \lambda$ impedance matching element. The j pole antenna is a popular antenna design among amateur radio operators because it is effective and easy to build. This calculator can be used to design a slim jim or a j pole. How does this dual band work?

This step is very important, and can be made easier by the use of swr. The j pole antenna is a popular antenna design among amateur radio operators because it is effective and easy to build. How does this dual band work? With a 50 foot length of rg8, and the antenna 20 feet in the air, swr was a respectable 1.13:1 for the 147.780 mhz input. This calculator can be used to design a slim jim or a j pole. My understanding is a j pole is a $\frac{1}{2} \lambda$ dipole attached to a $\frac{1}{4} \lambda$ impedance matching element. Effectively, the antenna is an end fed dipole.

Modified Ed Fong rollup dual band Jpole antenna kit K7JLX's blog

Double J-Pole Antenna Effectively, the antenna is an end fed dipole. How does this dual band work? This step is very important, and can be made easier by the use of swr. With a 50 foot length of rg8, and the antenna 20 feet in the air, swr was a respectable 1.13:1 for the 147.780 mhz input. Effectively, the antenna is an end fed dipole. This calculator can be used to design a slim jim or a j pole. The j pole antenna is a popular antenna design among amateur radio operators because it is effective and easy to build. My understanding is a j pole is a $\frac{1}{2} \lambda$ dipole attached to a $\frac{1}{4} \lambda$ impedance matching element.

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