Question about Cobra 19 DX IV CB Radio

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My Cobra 19 CB emits a pieping noise when RX or TX

I replaced the TDA2003 already worked fine for a liitle while but in hot and humid location radio started to piep again.
I have 6 units same problem different locations / set up / antenna all in hot and humid location

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  • sentani_avio May 20, 2009

    I have 4 units with the same problem. When they are hooked up to the battery, with solar panel charger, they will start making this noise. When I hook them up to my bench power supply and test them with a AM/FM 1200S I get the same problem when I heat up the TDA2003 ic. I replaced the ic's but get the same problem.



    Do I have to look at other types of radios that are able to work in a hot and humid invironment? Any ideas on a better cheap radio?

  • sentani_avio May 20, 2009

    it's a Cobra 19DX IV, the audio amp is a TDA2003.

    You know if I could upgrade the TDA2003 with something similar?

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6 Suggested Answers

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informatica
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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!

Informatica

Posted on Aug 31, 2008

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SOURCE: I have a Cobra 29 LTD with Bluetooth. I have no

if the antenna warning indicator is lighting during transmission then the antenna is either located and.or installed improperly or a defect exists in the antenna mount or the feedline itself, including connectors.

Posted on Jun 10, 2009

Benimur
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SOURCE: Radio lights up, but no TX/RX.

Hi and welcome to FixYa,

Based on your description, a possible drift in the local oscillator.  Check the 10.24Mhz crystal filter and its local oscillator for output and consistency.

Good luck and thank you for asking FixYa.

Posted on Aug 24, 2009

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SOURCE: Red RX/TX and red ANT light on my CB

Well,first hand ,some cobra radio,s have red some have green RX/TX lights, but are you modulating? Some green lights turn red. What is your standing Wave on the antenna,s? You need to check it and the output of the radio. To do this you need a watt or field strenth meter. Can get one at Radio Shack. Your standing Wave is ok as long as it is below a 2. That has to be done on the antenna. ..hope this helps...

Posted on Mar 12, 2010

Testimonial: "Thx the rx/tx light is supposed to turn red I found out. Still trying to get the antenna prob fixed though."

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SOURCE: CB Radio has red light on Rx and red light on

The red light on rx is fine, it's supposed to change from green to red. The red light on your antenna means you have a swr issue, something in your antenna system is not right. You need to go to a reputable CB shop and have them check your swr.

Posted on Aug 09, 2010

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