Question about Cobra 148 gtl 40-channel classic cb radio

1 Answer

My cobra 148 dont have eny sound or transmit

It haves the 8719 up grad

Posted by william bean on

  • Mike Charette May 18, 2014

    Hi william bean, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?

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1 Answer

Mike Charette

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  • Cobra Master
  • 1,847 Answers

Try unhooking your antenna to see if you hear any noise.

Posted on May 18, 2014

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5 Related Answers

Anonymous

SOURCE: cobra 148 gtl

Open the radio up and find the L22 Can/Pot. It's the one with the wire soldered on top. With both fine and coarse Claifier/Voice Locks in the 12 O'Clock positions, confirm, then listen for someone that is on the correct frequency and turn this pot (small ferrite core inside) with a small plastic preferred screwdriver, until they sound clear. Do this for USB as well except, the Can/Pot is L59. Don't adjust the VR5 (transmit) unless you need to.

Posted on Dec 01, 2007

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Anonymous

SOURCE: cobra 148 gtl

First take a jumper wire and connect it to the DC Ground of the input of the radio then touch it to the TX pin on the radio if it does keyes up then its in the mic or mic cord on the end of the mic plug or where it goes into the mic cable goes up inside the mic. If the radio don't key up at all then check the main voltage regulator chip one pin will have 8 volts transmit and another pin will have 8volts recieve. If you get no switching DC voltage on the regulator then its bad and needs replacing there is also a known bad capacitor in the radio thats only 10 volts change it to 25 volts at the same capacitance.

Posted on Jan 08, 2008

Anonymous

  • 9 Answers

SOURCE: cobra 148 gtl channel mods

contact me i can mod your radio for 65.00

Posted on Dec 06, 2008

Anonymous

  • 22 Answers

SOURCE: cobra 148 gtl dx manual

This is the Manual for the C148GTL

Posted on Apr 23, 2009

Sheldon Dedek

  • 912 Answers

SOURCE: Installing an Astatic Echo Board in a Cobra 148

There should have been instructions that came with your reverb board. You are going to need to drill another hole in the case of the radio, or find a control where you can install a dual control knob onto.

Your reverb board is likely going to need 8v, so you will need to locate that off the logic board, likely from the frequency synthesizer. The the audio lines from the mic, or the output of mic amp, are going to be redirected to the reverb, and the output of the reverb feed back to where the wires were removed from.

If I recall correctly, the 148 is a bit of a bear to work with, not much room inside. You will likely have to get creative in placement of the reverb board itself. Make sure to wrap well so that it doesn't get tossed around and break something inside.

Posted on Sep 15, 2009

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2 Answers

Cobra 148 gtl d has problem transmiting with covers off. trying to tune radio up. was thinking I need to ground the chasis


I would say a bad or cold solder joint on board somewhere. Bad quality control. Might flex radio chassis slightly while keying? A tooth pick and hours of probing around switching area on board and the pa section till problem found.

Oct 25, 2012 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Cobra 148 gtl-st wont transmit but receives great


Check first your microphone

• check if TX is engaging when PTT is pushed.


• check for continuity ( mic and cable )



If you have not done these steps,

try it first, or borrow other compatible mic for Cobra 148GTL

from your friends on air.

Jul 28, 2012 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

My cobra 148 work well on am but not on lsb


clipping the limiter should not have prevented tx on sideband are u sure u didn't do something more accidently. r 131 is the correct limiter for the 148. just out of curiosity what year 148 is it?

Jun 15, 2012 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I have a new cobra 148 with ssb, about 6 months old, while i was away there was a storm, now the radio doesnt work , recieve or transmit, i also have a cobra 29 ltd that wont transmit but it will recieve....


make sure the mic is good. If for some reason the mic went bad, it will not receive or transmit.

As for the one with no receive, it most likely needs a new final.

If lightning hit your antron, it would be in pieces.

Aug 02, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I need a wiring diagram for a roadking 56 to a cobra 148 can u help me


Pin #1-audio-white,2-shield,3-black,4-Sw com,5-transmit-red .....hope this helps..

Mar 26, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

We have a Cobra 148 nw st Sound Tracker When


It could be..
Final blown : worst case
bad mic : try another one
CB/PA switch on PA instead of CB
CB/WX swithc on WX instead of CB :you cannot transmit on weather.
Broken wire on mic jack.

Try the mic and switches first, and if that doesn't help you may need to take to tech. You can find one at a cb shop usually at truck stops.


Oct 27, 2009 | Radio Communications

1 Answer

Have a new cobra 148 gtl took out of box no transmit or recieve


make sure that your [swr] hadn't changed or went higher than a 1.5, anything higher will interfere with your tranmitting an recieving. other than that with out being there to see an hear your radio this would be the first place to start.

Apr 25, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Cobra 148 GTL steady tone though speaker


try rerouting your coax cable and make sure it's long enough

Jul 07, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Cobra 148 gtl


Open the radio up and find the L22 Can/Pot. It's the one with the wire soldered on top. With both fine and coarse Claifier/Voice Locks in the 12 O'Clock positions, confirm, then listen for someone that is on the correct frequency and turn this pot (small ferrite core inside) with a small plastic preferred screwdriver, until they sound clear. Do this for USB as well except, the Can/Pot is L59. Don't adjust the VR5 (transmit) unless you need to.

Oct 06, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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