Question about Cobra HH 38 WX 40-Channels Handheld CB Radio

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I have spotty reception on a handheld CB and was wondering if there is a testing procedure I can use to check the antenna and radio. I have a multimeter. It's a radio shack handheld with weather bands and the antenna is a "rubber ducky" type

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  • Anonymous Mar 16, 2014

    What is the Radio Shack TRS number for the 21-1679 handheld transceiver and who made it for them ?

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The antenna is your problem not much gain. Height is everything tx and rx. Although it would not compare to a conventional cb size negates performance. Seeing is believing in this case hearing get adapter to connect to standard coax of antenna. (PL259) to BNC Coax Adapter Radio Shack sells them. And dont ask or buy any radios there. They are hardly the radioshack of choice anymore.

  • If you put 4 watts into a four-foot antenna, you will get the same power out of that antenna as if you were putting 2 watts into a 102-inch whip.
  • If you put 4 watts into a 3-foot antenna you will get the same power out as if you were putting about 1.5 watts into a 102-inch whip.
  • If you put 4 watts into a 7.5 inch antenna on a hand held CB, it would put out as much power as a third of a watt into a 102-whip.
  • If you put 4 watts into a 102-inch whip antenna, it is the same output as if you put 11 watts into a 3-foot whip.
  • If you put 4 watts into a 102-inch whip antenna,, it is the same as if you put 14 watts into a 28-inch antenna.
  • If you put 4 watts into a 102-inch whip antenna, it is the same as if you put 54 watts into a 7.5 antenna.


Posted on Jul 08, 2011

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