Question about Cobra 19 DX IV CB Radio

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HI ...i was told it was my K30 antenna SO i got K40 an now STILL NOTHING ..no tranmittimg ..no receiveing ....FED UP please anyone help ..please..ADVICE

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Do you have a good ground on antina or radio

Posted on Jan 03, 2011

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1 Answer

A k 40 magnetic antenna has high swr and wire and everything looks fine


The K40 is known to fail after that many years in service when moisture gets into the coil it causes it to change it resonance freq. and hence the higher SWR. Buy and new antenna and enjoy 10 years is way to long for an antenna to last.

Apr 05, 2014 | K40 CB Antenna K-30

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Replace lead wire on k40 antenna


the coax doesnt solder it screws in twist the replacement wire clockwise to secure it they have it ehow tech its a website because I had the same question

Aug 17, 2012 | K40 57.25 Base Load CB Antenna Kit with...

1 Answer

My K40 unit keeps beeping 2X every 10 seconds or so.. It still goes off when radar is present but it wont stop beeping. any insights would be helpful


You have a K402000 radar system. The double beep is a rear receiver disconnect notification. If you go to the K40 website and access their dealer locator from the dealer section, you can find an authorized dealer to help you with this problem or you can call K40 directly and speak to them...they really are a great company to deal with.

Aug 20, 2011 | Calibre Radar Detector

1 Answer

My radio is not broadcasting reports.


Maybe its not transmitting because a Final Transistor has blown. Check to see if it receives well, change antennas,microphone...get a meter to measure SWR/POWER out. If it don't transmit or receive it may be seriously damaged. A final only cost several dollars if you know how to solder one in place. Its always like 2SC2078(Radio Shack carries them) it has 3 prongs to be soldered on the board with a heatsink and screwed to back with a ceramic insulator and heat glue. Swr over 2.1 will cause transmitter damage. Bad antennas,lightning may cause these problems. Get an antenna factory tuned at near 1.5 for 27mhz.Wilson 1000's,K40,Antron A99(18 ft.base) are good antennas.Look at www.copperelectronics.com for radio supplies,antennas and new radios.

Apr 20, 2011 | Radio Communications

1 Answer

I just can't get any range. I drive a company truck so I do not want to modify the truck. It has a standard antenna and I nought the uniden 69 with the weather channel as well. I was thinking of buying the...


Hello cktmn,
Welcome to FixYa.
My name is John, and I will be assisting you with your issue today.
Yes, the K40 is a great antenna for that radio and it should come with the COAX on it.
It is a magnet mount and the best place to put it is on the top of the vehicle or the center of the trunk. You will be surprised as to how well it works.
I hope this was helpful to you and thanks for choosing FixYa today and in the future.
Your comments are always welcomed here.

John

Feb 24, 2011 | Uniden Bearcat Pro PC68XL 40-Channels Base...

1 Answer

I have a pickup with a fiberglass bed cover, inside is a Cobra 29. When the k40 antenna is on the bedcover (magnetic mount w/ 6x6 inch metal plate glued to the bedcover) radio will give me an antenna...


Well, the k40 is designed for roof or trunk mount,you would not be getting a good ground,plus you would be getting feed back from cab,no good transmit or receive. Get a good 102" fiberglass or steel whip that's bumper mount,mount it on right rear bumper and you will be good to go.

Mar 28, 2010 | Radio Communications

1 Answer

I have a coba ultra 19 iii in myt truck what is


You need to buy an antenna that is designed for use with a CB. A couple of good ones are the Wilson 1000, Wilson Lil' Wil, K30, K40. You will only pick up "everything" within the 40 channels with that radio.

Jul 09, 2009 | Cobra 19 Ultra II CB Radio

3 Answers

No antenna lite when transmitting


Antenna light should be a warning indicator for high VSWR..... simple rule of thumb for CB antenna.... the lower the frequency "channel" the longer the antenna length, higher the frequency "channel" the shorter the antenna length. Your vehicle is a ground plane, where you mount the antenna will also affect its operation and tuning. A properly tuned antenna will have lower reflection on the midband channels and gradually rise as you near the upper and lower end of the band. Some base loaded antennas will be noticably narrow in bandwidth, if you have that problem then tune it for the channel you use most!
K40 has always been good for easy tuning and band coverage, center it on the vehicle top for good omni coverage!
PS... always make sure your connectors are secure, a loose shield will ruin your day when adjusting SWR!

Dec 20, 2008 | Cobra 29 LTD CB Radio

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