Question about ICOM Informatique Icom F21GM GMRS Radio with 4 Watts Output, CTCSS and Battery/Charger
Set the radio for simplex ptt monitor out buttons turn on radio make sure the other radios work with each other hold the monitor down if you hear white noise then you dont have the simplex duplex setup right and or try holding the monitor button in when other people are transmitting that would indicate a ctcss programming problem
Posted on Dec 09, 2006
Hello Think you have to make sure that both radios have the correct encode and decode CTSS or DPL, if you dont select the encode for one of them the other one just will light the green led but will not recieve. Also make sure that the speaker is working correctly. Check your programming parameters one by one. Good luck
Posted on Nov 30, 2006
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Posted on Jan 02, 2017
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