Vertical Antenna 5/8 Lambda for 70- cm Band

Credit Line: Forum from:

www.cqham.ru

By: Antonhax

At first the antenna was modeled by copper wire. Then the antenna was made on the base of bicycle wheel spokes. Figure 1 shows design of the antenna. Inductor of the antenna is wound on a form in 8- mm diameter. After that we have got inductor with 9- mm ID. Central wire of the RF connector is glued by termo- glue for water protection.

Antenna is tuned to the resonance by shortening length of the vertical part of the antenna. Precise tuning may be done by chosen the tap from the inductor.

Figure 2 shows ready antenna. Figure 3 shows tap from inductor of the antenna. Figure 4 shows vertical at inductor of the antenna. Figure 5 shows SWR Vertical Antenna 5/8 Lambda for 70- cm Band. Figure 6 shows Z Vertical Antenna 5/8 Lambda for 70- cm Band

Figure 1 Design of the Antenna Made on the Base of Bicycle Wheel Spokes

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