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Does anyone know where I can find the power and antenna cables for a Cobra mc600cx?

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  • Dean Pitts
    Dean Pitts Jan 22, 2017

    You can contact Cobra to find a dealer, or you can do like I did and check eBay. I just found an antenna on eBay for that marine chartplotter. Here is a link to the antenna:



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  • Cobra Master
  • 1,795 Answers

Great answer but I think you misunderstood what he wanted.I gather the person want to know where he can purchase an antenna and a power cord. My answer to him would be #1 At the truck stop with a cb shop . or #2 If they can't get to a cb shop then go online to Palco electronics .com or any other on line shop .

Posted on Jan 03, 2017


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Posted on Jan 02, 2017

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SOURCE: cobra 29 ltd classic antenna calibration ??

Wow. That's not at all a solution to what this guy is asking. And why all the caps??

The one point jm77437 has that is correct is that you do not set the radio, you set the antenna. The rest is blah blah.

Here is how you tune your antenna for you radio. First off it depends on what kind of antenna you have. most fiberglass antennas have a tunable tip to adjust the height of the antenna. Metal whips either have a collar at the base that the whip will either slide up or down in to adjust the height. The other type of metal whip's you have to physically clip to shorten the antenna, you must be careful with this type because once its clipped, that's it. You cannot add what you cut off.

I am going to give this example using a metal whip with an adjustable collar.

First after your radio is hooked up in the vehicle, drive to an open lot. Buildings and other structures can cause extra reflection. turn to channel 1. Flip the meter to CAL. Key the mic without talking. Now turn the CAL knob up until the needle reaches the little upside down triangle all the way to the right marked CAL. Now you have just celebrated your radio for your setup to measure you SWR. Now while still holding the key, flip the meter switch to SWR. The needle will move, and where it stops is your SWR reading. The lower the better. Anything under 1.5 is considered really good. But still, the lower the better.

Make note of what your SWR was on ch 1.

Now flip to channel 40. Repeat the SWR process. You must recalabrate each time you take a reading.

Now like jm77437 said. If your SWR reading is higher on 40 then 1, then your antenna is too long, and you must make it shorter. Loosen the collar and lower the antenna in the collar 1/4 inch at a time. check the swr each time you adjust the antenna.

If your SWR reading is higher on channel 1, then your antenna is too short. You must make your antenna longer. Do this by loossening the collar and pulling the antenna upward in the collar 1/4 inch at a time, again checking the swr each time you adjust the antenna.

What you want to achieve is having the same SWR reading on channel 1 and 40. then you have the best match you are going to get with that antenna.

If your swr is under 1.5 on all channels, you don't need to fuss unless you are a perfectionist. then by all means go ahead.

If your reading is higher then 3, or your ant light comes on, something is really wrong. Make sure your antenna is connected all the way, and the coax is not damaged.

Its important to have an appropriate SWR because if you do not, you are reflecting too much signal back into the radio, and eventually you will burn out your final transistor, and your radio will be toast.

Some tips: make sure you check the swr with the doors and windows shut. Make sure you are in an open lot. Remember to calabrate ecah time you take a reading. If you have had your radio peaked by a radio shop, and they have lowered your dead key, or have done a swing modification, then the meter in your radio will not work when taking an SWR reading and you will have to use an external meter.

Posted on Apr 24, 2009

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1 Answer

I have a cobra 29 LX Max that I hooked up and everything passed. I later changed the power cord and now it says antenna fail when running test and antenna warning when I key up. I can receive,transmit

That is odd. I would unplug the unit. Now unscrew the antenna and check the connector attached to the coax. If you can unscrew the antenna, use a continuity meter and test the cable with the connector. Sometimes connectors whether installed by you or a factory simply fail, or the solder fails. You may need to replace or resolder the connector. Best of luck and post your results.

Feb 12, 2017 | Cobra Radio Communications

1 Answer

My cobra 200gtl rev 2 cuts out on ssb after a few minutes

It sounds like the final transistor may be shorted/burned out. If you don't know how to locate or test the transistor you'll have to take it in to a tech. These transistors are usually quite cheap but as to the labour cost it depends on your tech. Usually what causes this damage is a bad antennae match or a bad antennae itself, even a shorted antennae cable. After you've repaired the radio check the antennae and cable first before connecting it up again, then check your match with an SWR meter. Good luck

Mar 23, 2014 | Cobra 200 GTL DX 4-Channels Base CB Radio

1 Answer

Cobra 142 very low rf output

Check your antenna, cable and all connectors. It is common for power to fluctuate if you have any short anywhere in the radio to antenna system. Do not test your radio without an antenna attached or what is called a "dummy load", you may fry your transmitter. Do not trust cheap cables that are pre assembled, I've had many bad out of the box.
John L.

Jan 22, 2014 | Cobra Radio Communications

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We can order them Power cables. We have a few antennas instock or can order what you need. with the lowest prices around.

Dec 25, 2010 | Cobra 200 GTL DX 4-Channels Base CB Radio

1 Answer

Cb only has 200 yard range -- after that I can not hear anyone.

Check the antenna feeder with a meter (resistance range), try disconnecting the antenna from the end also this will check faults on the cable, if there is a resistance this usually means faulty feeder. If there is an infinatly high resistance this is fine. (open circuit)

Get a power meter and check the output power, if its lower than whatever high power should be 4-5watts on a non-sideband radio, then your output transistor/driver has blown.

Jun 15, 2010 | Cobra 29 LTD CB Radio

1 Answer

High SWR

the problem is in the antenna cable. the lenth of a antenna cable must be divisable by 3. try replaceing cable with a 18 foot cable that should fix the problem.

Apr 11, 2009 | Cobra 19 DX IV CB Radio

1 Answer

Truck almost dies when mic is keyed

Hello stews78bronc,

First I want you to do one thing; disconnect the antenna cable and measure the resistance from the antenna connector center conductor of the cable to ground using the Rx1 setting on an Ohmmeter, you should have infinite resistance (no meter deflection). If you do have some deflection you have a shorted antenna and you have to have it replaced or repaired. There should be no connectivity of the center conductor to ground. This is what this problem sounds like. Don't key the mic with the antenna disconnected because this can damage the final stage RF power amplifier.

The antenna should be installed with a non-conductive washer between the antenna and the ground plane screw.

I hope this helps,

Thank you,


Mar 25, 2009 | Cobra 19 DX IV CB Radio

1 Answer

Cobra 29 ltd when powered up error Y can anyone help me

Hi and welcome to FixYa,

Often an error code "Y" would indicate test/diagnostic result of the antenna. A communication equipment thus equipped would test the SWR and display this error code if:
  • no antenna detected; or
  • SWR of antenna is way too high.
Although am not familiar with the version of a Cobra 29LTD with this type of display. Could you pls post back the exact model of the radio, normally there would be two (2) more letters after the LTD something like Cobra 29LTD BT.

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

Dec 19, 2008 | Cobra 29 LTD CB Radio

1 Answer

New Cobra 29 ltd


Appreciate the direct "Ask Me". If I may clear up your concern:
  • you have two CB radios, one is a Cobra 29LTD and the other?
  • both have received and both do not transmit;
  • you have two trucks, one with a Firecracker 1000 antenna, and the other?
In any case and initially, TX (transmit problems) could be caused by:
  • defective PTT/mic;
  • defective finals/drivers;
  • defective PL-259 connector/RG58 Cable;
  • antenna grounding/SWR;
  • other electronics internally
Please check the above. You may need an SWR meter, a watt meter and a DVM/VOM to perform the tests.

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.

Nov 05, 2008 | Cobra 29 LTD CB Radio

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