Question about Cobra 29 WX NW ST 40-Channels Base CB Radio

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Cobra 29 ltd nw classic

D8 is smoking after i changed the final.. i changed final back.. still smoking.. what could be wrong?.. i checked diode with meter.. one way i get no reading.. the other way it goes up in the 500's..

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Yes, Do Not Turn Up Too 500's Way Too Dangerous, The Problem Might Be That Inside Some Cords May Be Rubbing Wrong Or, You Have A Short Cord, If Not Any Of That It Is Probally Broke

Posted on Aug 07, 2008

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I have a dead short in my cobra 29 ltd classic, i replaced the protective diode, & i have also replaced d8 but i still get no power at all, can someone please help me fix this radio for a school...


Hello radio,
Welcome to FixYa. My name is John, and I will be assisting you with your issue today.
Hope you replaced the diode in the right direction! There a few capacitors in that area
you need to check, but first, turn the unit Over and check that there are no burned
Trace in that area, if so, repair it. Check that the in-line fuse is good also. Hope this
was helpful to you and your Comments and Testimony's are always welcome here.
Thanks for choosing FixYa today and the future.

John

Mar 01, 2011 | Cobra 29 LTD CB Radio

1 Answer

I have a cobra 29 nw ltd classic i cannot hear or be heared


Start with the antenna that you have hooked to it, is it grounded, is the coax in good shape, is the connector in good shape. stuff like that.

Jun 14, 2009 | Cobra 29 LTD CB Radio

1 Answer

My cobra 29 NW/WX won't power up.


Open the case and hook power inside past the power socket. They do go bad from time to time.

Also, if you never checked the SWR, and you noticed the ant ligh come one ever, you could have burned up your final. You now have a paper weight.

Oh and the protection diode is D28 not 23. It should be a big black one. Also, D8 is another protection diode. they are the only big black diodes in the radio.

Apr 16, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 nw ltd won't transmit


Have you cracked the radio open yet?  check for loose connections etc.  get back to me if that doesnt yeild any results

Dec 23, 2008 | Cobra 29 LTD CB Radio

2 Answers

Cobra 29 nw


Hi and welcome to FixYa,

Initially, pls check the final and pre-final (TR15 & 15) and that it gets modulated TX+12 through D8 from T1 which in turn is the output of IC4 through C48.

Perhaps a schematic diagram may be of further help.

Good luck and Thank you for using FixYa. Happy Holidays.

Dec 08, 2008 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 issues


Check D23 and D28. They are polarity protection diodes. It could also be the power knob.

Nov 09, 2008 | Cobra 29 LTD CB Radio

1 Answer

COBRA 29 NW LTD CLASSIC


Capacitor C-82, which connects the output of the driver to the input og the final, is leaky or shorted, putting +12 volts on the base of the final, which blows it immediately.

Mar 28, 2008 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

29 help


hi, sounds like you have a problem with the SWR' S Probably too high. Tumbleweed01

Mar 12, 2008 | Cobra 29 WX NW ST 40-Channels Base CB...

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