Question about Superstar Radio Communications

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Off frequency by 1khz on USB only Rest of the radio works fine. Thanks Ian.

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There is usually three voltage adjustment points for AM, USB and LSB, these look like small, square metal cans not all that far from the channel knob. These are not usually marked and will vary from radio to radio as the chassis are different. A scope or analyzer is needed to do the proper adjustment. but listening to a known good signal source can do the same. Not for the novice, leave it to a technician.

Posted on Feb 13, 2010

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  • The UK uses more FM frequencies than AM frequencies. So the CB will work over there just fine but you will need to find someone who uses them frequencies as well or it may no be much fun. Here is a frequency chart for what we in America call import radios shipped from over there. http://macuk.org.uk/cbchart.htm 27.555 FM is the main frequency used in the UK but the Cobra 19 is a strictly AM CB. Also on the link on the far right are the standard 40 channel frequencies from the UK version of CB's and not one is the same as the Cobra 19 as the UK uses FM for their 40 channel CB radios.
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1 Answer

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I can't pick up anything...


Hello even though everything is connected properly, have you checked for standing waves on the antenna to radio connection? Also you may have to perform a sensitivity test on the unit. The problem is you need a RF generator for that. Set you RF generator to the frequency that is equal to the CBs middle frequency and modulate the CW with 1KHz at 50% modulation, tune to the middle of the CB band on the radio and set the output of the RF generator to .1uv and loosely couple the signal to the CB antenna with a loop of wire. Your CB should be picking up a 1KHz tone gradually turn the power level down and when the tone cuts off that level is cutoff level, then increase the level until you can hear the tone again when the tone cuts on that value is the sensitivity of the unit. Compare the measured value to the value in the owners documentation. if the sensitivity is low this could denot a problem in the RF/IF section of the CB.

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