That's why the big " steel whips will roast on CB and VHF Lo because they're 1/4 wave. A full wave CB antenna would be 36'. Not too practical! Fixed or basic antennas are dedicated exclusively to radio amateurs. They use CB radio stations in a fixed location. In such situations, classic antennas for. Many hand held radios will use a whip antenna that is 1/4 wavelength on VHF and 3/4 wavelength on UHF. Handheld radios tend to get used in all sorts of. CB Channel 40 uses the frequency MHz. One Wavelength for , Feet = / So we want to make a antenna that is resonant on channel. The rod functions as an open resonator for radio waves and oscillates with standing waves of voltage and current along its length. The length of the antenna. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. There are usually four radials, three being a minimum, but you could use up to. You can co-phase any (2) ½ wave ground plan antennas or 2 Yagi beams. These are normally called The same above applies for stacked 3's, 4's, 5's, etc.
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