Question about Cobra 19 DX IV CB Radio

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Coax ends The end of coax that screws onto cb has come off, how do you put a new one back on.

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Hello kewball,

You can buy the PL-259 connector at radio shack (Here is a link to the instruction on how to put a PL-259 connector back on):
http://www.stu-offroad.com/misc/rfconn.htm

I hope this helps

Thank you,

Shuttle83

Posted on Nov 04, 2008

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1 Answer

Cannot find where to connect aerial lead into tv


If set has a coax or cable fitting and antenna lead is flat wire you need a adapter---flat wire is usually 300 ohms and the coax is 75 ohms, the adapter in that case will allow you to attach the flat wire to screws on it and then slide the other end onto the cable fitting.

Dec 22, 2012 | Televison & Video

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Can't talk long distance seems I can only talk for a hundred yards and then I can't hear other drivers


  • Hi, I can help.

  • The most important part of a CB set up is the antenna and the coax/connectors being used. Make sure your antenna is a good one. If you want a suggestion on a good one leave a comment with your budget and weather your using a mobile/base set up. Make sure your connection is goo. Check the PL259 and make sure the braids have not split off for inside. Soldier a new one on if necessary.

  • I will give you some instructions to peak your CB and adjust the receive. Make sure the CB ha no power and use a plastic screwdriver inside your radio.

  1. Pull the bottom cover off of your radio.
  2. Put a watt/power/SWR meter inline.
  3. VR1 is your receive gain, adjust that to pick up from farther away. Note white noise can occur along with this as you will be sensitizing the front end.
  4. Adjust VR4 for 100% modulation (swing)
  5. Right by the final is a can with some glue on it. Scrape the glue off and turn that ferrite out until your power output is 4 watts RMS (not bird)
  6. Your Cobra 29 is now peaked and tuned as much as possible without using a Oscilloscope. And doing this this way will not require a re-alignment afterward.
  • Don't touch any other pots in the radio.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Sep 19, 2011 | Cobra 29 LTD CB Radio

1 Answer

I have a cobra cb for a rig. I can only pick up if iam right beside someone. If iam alittle ways behide I can only hear a word or two that they are saying. Is there something such as " a blue screw...


Odds are it is your antenna or coax more likely coax or a ground issue with them.
Make sure your antenna in mounted correctly a pinched coax can have a dramatic affect on reception.
Beyond that Cobra has a hit and miss record on quality control but there is no magical blue screw. There are 9 tuning coils that if tuned incorrectly will degrade or make your reception intolerable. A receive alignment for a reputable shop would improve the reception even though this is most likely not the problem.
It is possible that you have had quote "the front end" damaged referring to a pair of diodes but that usually happens when your radio is close to someone running a lot of power. Truckstops are good for that.

Aug 12, 2011 | Cobra Radio Communications

1 Answer

One thing I notice is that when my regular radio is playing on the AM band I get interference through it from my CB when I key the mike. Also, if I touch the CB or mike or mike cord the static I hear...


Your CB is AM as is your other radio. AM stands for Amplitude Modulation. The frequencies from AM are between 530KHz and 1700KHz. The CB can be heard through your AM radio because they operate on the same frequencies. But not so much under normal circumstances. First make sure your CB is grounded well. Take a copper braid strap or a solid 12 gauge copper wire and hook one end onto one of the bracket screws and ground the other end to a pipe or perhaps a hose faucet outside. This will help a lot. Proper grounding is key to removing this interference. You might want to put a ferrite bead on your coax close to the back of your CB too. You can also buy a ferrite bead and rap the cord to your radio around it several time up close to the radio. These things will take care of it. Another thing is if you are running power behind it or maybe your CB is really "peaked and tuned" this will cause interference as well. To much and the FCC will knock on your door and offer you a $10,000 fine you can't refuse. Hope this helps.

Mar 22, 2011 | Cobra 29 LTD CB Radio

1 Answer

How do i connect areil lead to outside ariel


you don't say what kind of wire you are using. If using coax, just screw the coax connector onto the back of the set, the other end should fasten to the connector on your outside antenna, If you are using 300 ohm wire, then you need to purchase an adapter that goes from 300 ohm to coax connector (these are called balun connectors) you can get one at radio shack..

Mar 16, 2011 | Televison & Video

1 Answer

I have Cobra 29 LTD Classic and need to know how to take the old co-ax out to put a new one in????


you just unscrew the coax from the back of the radio. there is no coax in the radio. Coax is the wire that runs from the radio to the antenna.

Nov 14, 2010 | Cobra Radio Communications

3 Answers

With my CB I am getting feedback through the am fm radio speakers


Hello there:
the shielded coax rgu-45 series is probably the best one for this application also if you run the radio to a different fuse or u can also get a surpression filter that goes on the coax line I own a WL9000 KW. i had the same problem untill i got the filter installed at a loves truck stop in texas and no more problems since ok?
drive safe and best regards mike (warner transp.)

Mar 26, 2009 | Uniden Radio Communications

1 Answer

Digital to analog converter box hookup


You will have to go to Radio Shack or Wall Mart, maybe Home Depot and get a matching transformer. That will have spade terminals on one end to connect to your tv and a round (75ohm male thread) to hook to your converter box.

Jan 08, 2009 | Televison & Video

2 Answers

Cobra NW LTD CB radio


start out by getting a good antenna like a wilson or k-40 if your using it on a big rig make sure its a metal mirror and door a lot of big rigs use fiberglass and thats a nono you must get a no ground plane antenna...its all in the antenna...good luck doc's cb shop ny

Apr 09, 2008 | Cobra 29 NW CB Radio

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