Question about Cobra 148 GTL 120-Channels Base CB Radio

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Cobra 148 gtl new model

I have purchased two of these radios,when i transmit on lsb everybody says i am distorted an unaudible.I took the first one back.The second one wont transmit on sideband.I use to love the old 148 but the new one is a piece of junk.I called cobra in chicago and talked with customer service.The answer to my problem i recieved was turn the voicelock(clairifier)all the way to the right and the anl off....?WHAT? i believe cobra has a big problem with this radio and wont admit it. Their customer service is less than desired.What can i do to solve this problem

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Hello bluzfan, Do you remember the old 40 channel CBs? they used basic A3A transmission (dual sideband single carrier)remember how you got crosstalk sometimes, if your power was too high? Then they went to 80 channel CBs (using a single side band as Lower Side Band (lsb) and the other as the upper side band (usb))? more crosstalk but they invented anl (automatic noise limiter)circuitry to compensate. Now you have the 120 channel CB which uses a form of side band multiplexing (20QAM) to generate 3 times more channel density 40 X 3 = 120. Here is my problem; Cobra should not have done this because you will have massive crosstalk and unaudible sounds because of the increase in channels but not an increase in initial (physical)bandwidth. I hate to tell you this but the only cure for the is to use it in 40 channel or 80 channel mode forget the 120 channel mode, or get a radio with better channel separation.

Posted on Oct 07, 2007

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