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Cobra 29LX Problem - Failed RF Power Output Fail / PA Speaker Works

MikeyMcFly

New Member
Sep 27, 2014
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This is my first post on the forum and hopefully someone will have had a problem like mine and can help me. I do apologize that I do not yet know the terminology so please be gentle if I ask a bunch of questions to any replies.

I installed a Cobra 29LX radio into my Tacoma today and ran into an RF Power Output Fail during the self test feature. First, let me run through my setup:

I have a 4' Firestik which is the NGP model. My Tacoma has a composite bed, so this solves my ground issue.

My radio has not been tweaked or modified for performance, however, I did do something to the radio for my application. I wanted to do a remote face in which I mounted the face of the radio/front board into one of the pockets in my dash and then have the actual radio unit under the driver's seat. I used Cat6 cable to accomplish this. My wiring was connected using Dolphin connectors for approximately 100 of the connections, the remainder of the connections were soldered. I checked each connection with my multimeter for continuity and everything came back fine.

After I extended the radio I powered it up using a quick 12v lighter adapter just to see if the unit would power after all of my work which it did. I built a plate to mount the radio in my truck and it's now installed and I'm pleased with how it looks.

I followed the instructions in the owners manual to set the calibration by adjusting the knob to get the SWR basically to the edge of the meter on Channels 20, 1 and then 40. When I check my SWR in each of those channels it registers below 1.5 (1-2 notches illuminate on the display). I had decent reception in my driveway which has some trees, and could clearly hear on multiple channels, including people who were claiming they were from Texas (I'm in MA).

Now, I ran a self-test on the radio and when I did that I pass the power (Test 1), fail the RF Power Output (Test 2) and pass the Antenna Test (Test 2).

I did some reading and didn't really understand much of what was being said. I did connect a PA speaker to my PA speaker output and was able to hear myself. I have not done a transmit yet to see if anyone can hear me as I don't have anyone local I'm friendly with that has a CB. I'm not looking to be a regular CB user but my thought is it's a truck, it should have a CB and when I go to the Cape I don't get great cell service so if I'm on the beach it's a good idea.

My thought is that maybe one of the wires I extended somehow came loose. I did have one of the wires come off of the soldered connection but I was able to strip back the insulation, reflow the solder and it held.

I guess what I'm hoping for is a direction to go in if need be. From what I've read if I can use the PA, I'm in okay shape as far as something being broken on the radio, but I'm not sure.

Thanks for reading!
 

If you can check SWR's you can transmit drop down on Sesame st and ask the truckers for a date I'm sure you will find out if your getting out.
 
i think you need to try a external meter,,,, you never can really trust internal meters on radios............. external test meter will show more and get a better idea of whats going on...
 


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