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I have a 148 gtl.. when you tx, there is a loud high pitched tone at the receiving end(receiving radio)...and it is garbled...tried switching radios and when I tx the 148, the other radio had the same high tone, garbled rx??

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  • Anonymous Mar 20, 2014

    when I'm receiving there is a high pitch noise coming out of the speaker and the noise increases when the rpm increases.

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How far away are they? It sounds to me like they are in the same room???

If so, you are getting feed back. CB's are not meant to be that close. As well, the also would raise another issue. Are their antenna's hooked up?

CB radio's need a CB antenna or you can damage the radios. The radio energy will not leave the radio and burn up the transmit section of the radio.

the both need an antenna, and the antenna needs to be tuned.

Also, if you are operating them close like that, you can also damage the receive on the radios.

also, when 2 radios are too close, it over loads the receive circuits on the radio ant thats why its garbled.

Posted on Nov 17, 2010

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Check first your microphone

• check if TX is engaging when PTT is pushed.


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If you have not done these steps,

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Micgain


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.

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Thanks sharcnet i just going through the steps in my head trying to figure out what I would do if it was on my bench ..Between the two of us we'll figure it out!!!..... Dean

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