Tip & How-To about Radio Communications
Antennas for all radios need to have the SWR set, STANDING WAVE RATIO. Which means the antenna needs to be the correct length for it to work properly. Most people stick them on and start talking.. This is not good pratice to do. The lower the frequency the longer the antenna needs to be. The higher the frequency the shorter it needs to be. ie. 80m ham antenna needs to be around 67 ft long. and a wifi antenna needs to be just less than an inch. soo, Your CB is on 26.965ch1-27.405ch40 so ch1 is lower freq than ch 40.
obtain swr meter. inline with the radio - meter - antenna..
check swr first on ch1. then check 40 if there both good try to even out both so that there around 2.0 or less ideal is 1.1 to 1 or 1.5 to 1....
Now if ch1 is higher than ch40 = need to raise the antenna make it longer.
If ch40 is higher than ch1 = need to shorten the antenna.
some antennas have an adjustable whip. ie wilson, k40, predator10k, etc.
just adjust the whip to obtain low swr ...
some other antennas don't have whips to adjust. like Francis and OEM antennas on most trucks from the factory. these either need cutting like francis. or the oem style has a cap and wire wound under it. trim little bit at a time.1/8inch or less. if you never set swr before always try to find a good HAM operator to help you. or a decent cb shop. MOST will not charge you to do them. and Good Amateur radio operators and Good CB Shops will have an Antenna Analyzer made by MFJ.. This is what we Use here AnyMHz.com at our shop.There more accurate then a analog meter alone. And it will not interfere will people on the air like a swr meter.
Anyone that needs help please feel free to contact us. We're glad to help.
Posted by AnyMHz.com on
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