Question about Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

Micgain when ever I turn my micgain up the it make a hight pitch sound.

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  • Ronnie152 Mar 09, 2009

    mic squeal when mic gain is up all the way, used to not do this, problem just started, using any mic same thing.

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2 Answers

My SWR is 1.1 so I thats out of it. Where do i find the regulator and the switching circuitry?

Posted on Jul 31, 2008

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  • Master
  • 6,966 Answers

Hi,

Offhand, pls try:

  • If the high pitch sound (feedback) occurs during the receive, then you need to check the switch inside the microphone and verify that the audio line is not directly connected mic element wire; it should pass through the switch. Alternately, it may be the switch that is shorted. If you are using a power mic, you may have to lower the settings a bit or decrease the gain;
  • If the feedback occurs during transmit, you need to check the TX/RX regulator and switching circuitry. In some cases this would also be true if you are using a linear amp and the grounding is not adequate and/or the SWR relatively high.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 31, 2008

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Posted on Jan 02, 2017

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