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No sound on cobra 37st 40 channel - Radio Communications

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SOURCE: Cobra 75 WX ST 40-Channels Handheld CB Radio manual/antenna

Hi - You can download the manual from the link underlined in blue below:

75 WX ST

Other info here.

be2de56.jpg

Please take a moment to rate this solution & let us know if the information given was useful to you - Good Luck!

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Posted on Aug 31, 2008

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Cobra 75 WX ST 40-Channels Handheld CB Radio manual/antenna


Hi - You can download the manual from the link underlined in blue below:

75 WX ST

Other info here.

be2de56.jpg

Please take a moment to rate this solution & let us know if the information given was useful to you - Good Luck!

Informatica

Aug 31, 2008 | Cobra 75 WX ST 40-Channels Handheld CB...

1 Answer

Cobra 148 gtl new model


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.

Oct 07, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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