Radio Shack TRC-502 Owner's Manual

Contents

Radio Shack TRC-502 Owner's Manual Manual pdf 14 page image

14MAXIMUM RANGEThe maximum range and quality of CBradio transmissions vary depending onthe following conditions:• the type and quality of antenna used• the height of the antenna’s mountinglocation — the higher the antenna,the better the signal’s range• the surrounding terrain — moun-tains and tall buildings limit therange• weather conditions• the number of nearby radios operat-ing on the same channel• standing wave radio (SWR)between the antenna and the CBNote: Your CB radio’s transmissionrange is generally line-of-sight.REDUCING NOISEBecause your CB is exceptionally quiet,any noise you hear is probably from anexternal source in your vehicle such asan alternator, another radio or sparkplugs.The transceiver uses an ANL (AutomaticNoise Limiter) circuit to reduce noise.However, if possible, try to eliminate thenoise by finding its source.You can determine the noise’s sourceby turning off the engine and operatingthe CB with your vehicle’s ignition set toACC (or ON). If the noise is reduced, theproblem is in your vehicle’s ignition orelectrical system.Here are a few hints to help you reduceor eliminate such noise.• Make all CB power and antennawires as short as possible.• Route the power wires away fromthe antenna wires.• Be sure that the chassis groundconnection is secure.• Replace old ignition wires with new,high-voltage, noise suppressionwires.• Install noise suppressors on yourspark plugs, or install new sparkplugs that have built-in noise sup-pressors.• If problems persist, check your alter-nator/generator and regulatorgauges. You can reduce the noisefrom these sources by using bypasscapacitors at the various output volt-age points.Your local RadioShack store has a wideselection of noise suppression accesso-ries.21-1702.fm Page 14 Thursday, August 5, 1999 1:02 PM