Cobra 29 ltd no receive from speaker

Nice!!!!!! It works, I'm guessing that whatever blew the speaker that was in it when I got it also got to the one I put into it shortly after I turned it back on so one of the many parts I swapped out was shorting the speaker and blowing them up. Thanks all of you who tried to help with this problem y'all really do know what your doing and help quite a few people each time someone has a problem. Most sites dont do that or threads end with the problem never answered.

Again I appreciate all you guys do and thanks for the help.

That_guy_in_wv

Midnight special If I knew for sure what parts made my internal speaker and pa work right again I'd tell you but all I really know is I swapped out tr3, tr17, tr18, c52, c66, c71, R51 and the pa and external speaker jack. You might not need to change all those but I didnt know my new speaker had been burnt up by the radio by the time I had all them swapped out. I believe tr3 and tr18 are both switching transistors for tx/rx if I remember right one or the other. More then likely it was my jack on the back shorted or one of those tr's or caps shorted. Wish I could help more. I was in a cobra 29 ltd classic april 3 2008, KEPC-1106 board with a mfg date on the back, of march 2010. Hope that helps, it sounds like the same problem I had receive through the pa but my internal speaker didn't work either. Maybe someone with more knowledge in the pa section of the radio can assist with it.

It only takes a second to swap parts, the voltages were off on the parts I swapped, the caps I changed were 10volt and 16volt i put in higher voltage (so maybe they wouldnt short again) I was checking out the radio where I had just got it, I didn't say this because someone said not to tell just what all parts I changed so i didnt think it mattered to explain where it wasn't stated in the thread header. Some that were supposed to be 0.0 volt were reading 0.5v and others that were supposed to read 4.8v were 7.8v no sense in leaving in parts while I'm there that are showing voltage that's more then the voltage chart shows it to be. I have a sinad, digital voltmeter, frequency counter and signal generator but not everyone has those things. Its mostly a hobby for me and learning what I can and using just a voltmeter is what most would be doing if it were somewhere else. Like I said in an earlier post I didn't want to drag out a bunch of test equipment. I figured in the almost 40k members on here maybe someone has had around the same problem before and they have. I've spent a lot of time online before reading without all the test equipment figuring it out myself and most people who look up what problem I've had will be only using a volt meter in most cases so wouldnt it be hard for them if we just said take a scope or some meter they didn't have and try to explain it. It might be the right way but sometimes it's not possible, Again sorry I'm not sure exactly what part made audio come back to the speaker wires.