Question about Cobra 29 LTD CB Radio

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Cobra 29 Ltd

I posted this:
would like to increase the output power of my CB and know that there is a way to do it on the inside of the cb and would like to know how to do it I have a schematic diagram of the radio
You Responded with:
Hi,

Appreciate the direct "Ask Me".

To my knowledge, there are four versions of the Cobra 29LTD; LTD, LTD Classic, LTD Classic Gold and LTD Classic China. it is possible that the component/board layout number may differ with the one that you have. Additionally, most of the Cobra 29s uses a variety of Uniden PC78 board. Should you wish to try for experimental purposes only (but pls keep in mind probable difference of boards):

  • Modulation improvement - adjust VR4 to desired level or cut D11or max talkpower remove TR18 ;
  • AM Power - adjust L12, 13 & 14 for maximum power output using a dummy load/watt meter;
  • replace TR14 with 2SC1969 or 2SC1307.
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.


I have the Cobra 29 LTD Classic CB Radio, and the diagram for the 29ltd

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Hi,

Appreciate the direct "Ask Me" again.

The initial posting would still hold true, best would be:

  • remove TR18;
  • replace 2SC2069 with 2SC1969; and
  • adjust L12, 13 & 14.
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 Sep 08, 2008

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Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

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