Question about Cobra 25 LTD 40-Channel CB Radio

2 Answers

Can you expand the freq. range of the cobra 25 CB 40 channel radio

Was wanting to know if you can expand the freq. range of the 40 channel cobra 25 CB radio? A few years back I had a freind expand the range of my uniden grant 40 channel ssb CB radio but he is now gone and can't find anyone who knows if it can be done to the cobra 25 40 channel radio I have now. My old grant radio when he expanded it would cover the entire 11 band and most of the 10 meter band as well. If it can be done is it very diffilcult to do? Thank you for any information.

Posted by on

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Cobra Expert
  • 500 Answers

Yes its possible to do with the EXPO kits.. or an eeprom. but beware of the FCC rules please. RX purposes' only not to be used for Transmiting..

Posted on May 07, 2013

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 63 Answers

Theres no pin out procedure for this radio frequency modification is acheived with a expo kit only.

Posted on Dec 08, 2014

Ad

4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ironfist109
  • 3018 Answers

SOURCE: schematic diagram of cobra 148 gtl cb radio china made

  • Locate the MB8719 chip that is right behind the channel selector. Wire a SPST switch from pin 10 to ground and another from pin 11 to pin 12.


  • Channel Chart
  • Position 1: sw1 down, sw2 down
  • NORMAL CHANNELS

  • Position 2: sw1 up, sw2 down
  • 15=26.815 20=26.885 25=26.925 30=26.985(ch3)
  • 16=26.835 21=26.895 26=26.945 31=26.995(ch3A)
  • 17=26.845 22=26.905 27=26.955 32=27.005(ch4)
  • 18=26.855 23=26.935 28=26.965(ch1)
  • 19=26.865 24=26.915 29=26.975(ch2)

  • Position 3: sw1 up, sw2 up

  • 1=27.605 6=27.505 10=27.555 14=27.605
  • 2=27.455 7=27.515 11=27.565 16=27.475
  • 3=27.465 8=27.535 12=27.585 20=27.525
  • 4=27.485 9=27.545 13=27.595 23=27.575
  • 5=27.495

  • Position 4: sw1 down, sw2 up

  • 1=27.605 11=27.725 21=27.855 31=27.955
  • 2=27.615 12=27.745 22=27.865 32=27.965
  • 3=27.625 13=27.755 23=27.895 33=27.975
  • 4=27.645 14=27.765 24=27.875 34=27.985

Posted on Nov 09, 2011

Ironfist109
  • 3018 Answers

SOURCE: cobra 25 ltd classic 40 channel CB Radio,schematic


  • When you get to each link you have to click on "Click here to start download from MediaFire.." and the PDF will download onto your computer.
  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards,Tony

Posted on Oct 04, 2011

  • 1274 Answers

SOURCE: Have a cobra 148 gtl cb/ssb. It is brand new. I

Hi, my name is John. Welcome to FixYa. Check your antenna, you need to set it with a real SWR meter, pick one up at any near-by CB shack $10.00. Thanks for choosing Fixya...John

Posted on Nov 23, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

25 cobra cb want key up when mashing cb microphone


don't mash it.get another 4 pin mic from a cobra 25 or 29 and see if it still happens. if it does then you have an interior problem with the keying diode and or resistor.

Aug 31, 2014 | Cobra 25 LTD 40-Channel CB Radio

1 Answer

Frequency Range


You dont list the model but generally speaking no. The circuit is PLL and is difficult to change

May 05, 2013 | Radio Communications

1 Answer

Do you know the wireing for the cobra 25 ltd st where the mike plug on the inside buy color ?


You can experiment or look on some site Defcom Radio mods.. Snake doctors radio mods.

Apr 27, 2011 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

I have expanded my 25 ltd and want a rx/tx fine tune possibly using the rf gain control?


look at a schematic of a 29ltd to do that.. the 25 does'nt have it in there easily.. the 29 can be fixed to change tx/rx freq. with the delta tune

Feb 11, 2011 | Cobra 25 LTD 40-Channels Base CB Radio

2 Answers

In Thailand Cb radio users must use freq range 245.000 - 249.999 freqs. Do usa Cb's use this freq?


Thailand actually has three "CB" bands, the first is the same as the U.S. / CEPT (EU "European Community) band 26.965 - 27.405 MHz, the second is a 78MHz VHF mid CB band (I think its either 40 or 80 channels with FM mode) and then the 245.0000 - 245.9875 MHz VHF 80 channel band - apparently the law also stipulates that the 78MHz CBs must be yellow colored and the 245MHz CBs must be red colored.

But yeah, 245MHz Thailand VHF CBs are very illegal in the United States.

Jun 24, 2010 | Cobra 19 DX III 40-Channels Base CB Radio

1 Answer

What Voltage Does The cobra 25 ltd classic use?


12 volts, around 15 amps. For a base station, try an Antron-99 groundplane antenna.

Jul 19, 2009 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

Limited cb radio range on Kenworh t800 truck


I recall problems grounding the antenna on those kw's. May want to try a no ground antenna. Also the stock coax that comes with the truck sometimes gets broken or pinched. Go to a good shop, replace the cheap coax and grount the antennas.

Nov 26, 2008 | Cobra 25 LTD 40-Channels Base CB Radio

Not finding what you are looking for?
Cobra 25 LTD 40-Channel CB Radio Logo

246 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra Radio Communications Experts

AnyMHz.com
AnyMHz.com

Level 2 Expert

500 Answers

Brad Brown

Level 3 Expert

16037 Answers

yadayada
yadayada

Level 3 Expert

76682 Answers

Are you a Cobra Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...