How to check swr on a cb aerial

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briggie

Well-known member
Joined
Mar 11, 2010
Messages
10,409
swr stands for standin wave ratio and is a measure of the reflected power ,ideaaly this should be as low as possible to prevent damage to your radio .... a figure of up to 1-1.5 is acceptable providing you do not use any power boosters .


to measure the swr you will need a swr meter , this connects between your aerial and radio by means of a patch lead , change the cb channel to channel 1 and ensure the switch marked fwd /ref is on fwd .....press the ptt button on the microphone .. adjust the needle reading by means of the calibration switch/knob untill the needle is reading right at the end of the scale ( not over ) .... release the microphone ..... then switch the switch marked fwd/ref to ref ..... and press the microphone again ..... this is now your swr reading and should be as low as possible ....... do the same on channel 40 also .
 
swr stands for standin wave ratio and is a measure of the reflected power ,ideaaly this should be as low as possible to prevent damage to your radio .... a figure of up to 1-1.5 is acceptable providing you do not use any power boosters .


to measure the swr you will need a swr meter , this connects between your aerial and radio by means of a patch lead , change the cb channel to channel 1 and ensure the switch marked fwd /ref is on fwd .....press the ptt button on the microphone .. adjust the needle reading by means of the calibration switch/knob untill the needle is reading right at the end of the scale ( not over ) .... release the microphone ..... then switch the switch marked fwd/ref to ref ..... and press the microphone again ..... this is now your swr reading and should be as low as possible ....... do the same on channel 40 also .



incidently your radio needs to be switched on :doh
 

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