Question about Cobra 29 LTD CB Radio

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Cobra 29 ltd classick tuning

I want to turn up the power without taking it to someone i dont know and pay for work that might not work i would like to do this my self if i break it its on me and no one eles

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  • Anonymous Jan 10, 2009

    i wont to turn up the power how do i do it

  • randy24 Feb 24, 2009

    cobra 29 has been peaked and tuned but dont recieve as well as it used to is there something inside that can be tuned again? it still transmits good

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Here is a link to the Phantom CB's seb site, you can click on the brand of radio you want to peak, in you case, Cobra. Then follow through the chart to the Cobra 29 LTD Classic under the Cobra power mods, which tells you what to adjust and changes that can be made. Only one suggestion I have before you start, where it says to cut D11, don't, only turn up VR-4 for your modulation. That is the only thing I don't like with their instuctions is telling people to cut the modulation limiter. You can get full modulation by turning up the potentiometer, and if you cut the limiter, sometimes it will over modulate.

http://www.714xpress.net/714mods1.html


You need an inline power meter to peak the radio out. This is the quick and dirty way to peak and tune a radio. To properly align a radio, you really need an oscilloscope and other related test equipment.


If you have more questions, don't hesitate to post here or email me at rollincbmods@yahoo.com. I can't promise I will have an answer to all questions, but I will do the best I can to help.


Dean Pitts
Rollin CBs

Posted on Nov 21, 2008

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You can get amplifiers, RF amplifiers, Power boosters and all kinds of stuff from Ebay. Just look up CB radio amplifiers.

Posted on Nov 20, 2008

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Where did you buy the radio at? Can you return it to the store? If you purchased it at a big box store, like Walmart, they will take it back without a receipt on an exchange.

More than likely the radio was wired backwards by someone, which blew the protection diode, and then was returned to the store and put back on the shelf.

If it is just a blown protection diode, it is only a $10 fix at most any cb radio shop.


If I can help anymore, please let me know.

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dean@rollincb.com

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Hello Randy, do you have a fiberglass or stainless whip? What is your SWR & power meter readings now? --- The stainless whip may be creating a feedback and picking up static from transformers. Do you have a power microphone? If so you need to use a modulation meter to set it for 100% modulation. It could also be causing the crackling, that or your engine alternator.

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Here is a link for your radio, in case you don't have one.

http://support.radioshack.com/support_electronics/36554.htm

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