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My cobra 148 has no output on,but I can hear myself in.the talkback...

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  • Radio Commun... Master
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Try turning up VR-501. which ever way it is turned now turn it the other way to max and see if that works.If not turn it to max the other way.

Posted on Nov 04, 2013

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Posted on Jan 02, 2017

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One Wire
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SOURCE: talkback on a cobra 200 gtl dx

This procedure is not as simple as just cutting a wire. Note that you can possibly mess your radio up if any maintenace is not done properly. I do suggest taking your radio to a proffesional to have the talkback removed, but, if you really want to do it yourself, go to ghe following link and basically reverse what has been done.

http://www.cbtricks.com/radios/cobra/150gtl_dx/tsb/cobra_200gtl_dx_tsb_10041.pdf

This is the service bulletin for the addition of talkback to the Cobra 150GTL DX and the Cobra 200GTL DX.

As long as the talkback was added correctly, this can be put back origional.

If this does or does not help, please reply on here or email me at rollincbmods@yahoo.com. I look forward to hearing from you.

Dean
Rollin CBs
Mt. Vernon, TX

Posted on Feb 14, 2008

  • 9 Answers

SOURCE: cobra 148 gtl channel mods

contact me i can mod your radio for 65.00

Posted on Dec 06, 2008

  • 773 Answers

SOURCE: i want talkback on my cobra 29ltd classic radio

Open the case on your radio. Solder a 100 ohm resistor between the pa jack and ext speaker jack. You can add a switch if you like to turn it on and off. The lower the resistance, the louder the talkback.

Posted on Apr 25, 2009

  • 773 Answers

SOURCE: Cobra 29LTD CHROME low tx no mod, rx good low Vol, talkback good

1 why would you change the finals?? Have you checked you antenna? How are your SWR's? Crappy antenna's cause a lot of problems.

Use an external meter to see what the SWR is, and see what the output is PEP. If its low, then there is something wrong. If it is High, change the mic and turn up the dynamic all the way.

Next. Have you been messing around in there?? Tryin to get more wattage? You turned VR4? If you thought you were turning it up by turning it all the way to the right, you turned it all the way down. Turn it all the way to the left.

Posted on Jun 17, 2009

  • 905 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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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

Connex 3400 ,talkback distortion.


you most likely have a bad knob the pot need to be replaced

Apr 04, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Just bought a 142gtl and looked it up online. I


Don't get crazy into mods. Some are good some are bad.

Really all you want to do is a peak and tune on it. The cobra 148 has great audio already. The most I would do to it is turn up the modulation all the way, and the AM power, then put a swing mod in. That will get you max wattage. 2 watt dead key.

Talkback is only necessary if you are going to be putting an echo board in so you can hear how the echo sounds.

Jan 30, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

Why does my cobra 148 GTL CB give out a squeeking noise when i trasmit as heard by others receiving me ??


is this a new radio? if so then the voltage change on the vco/pll will cause a squeak. kindda like a cobra 19dx does. also like the old golden eagle squeal .. all due to the voltage being unstable.. now is it that prob or do you have talkback and its loud/bad grounds causing a squeal. that could be the case too. if you have talk back let me know there's a cure for that. contact us..we can put the talkback just lil outtaphase to stop 99% of the squeals in cobra/uniden chassis radios.

Dec 11, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

No sound output


a possible cause would be a broken wire in the microphone cord

May 27, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

I want talkback on my cobra 29ltd classic radio how do i do this myself


Open the case on your radio. Solder a 100 ohm resistor between the pa jack and ext speaker jack. You can add a switch if you like to turn it on and off. The lower the resistance, the louder the talkback.

Mar 30, 2009 | Cobra 29 LTD CB Radio

2 Answers

Scematic


Hi there!!

If you have an echo board what kind is it? I can give you the connections and where they go it just depends on which echo board you have!! I can also tell you where that talkback goes!! Let me know

Dennis

Dec 10, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

Talkback on a cobra 200 gtl dx


This procedure is not as simple as just cutting a wire. Note that you can possibly mess your radio up if any maintenace is not done properly. I do suggest taking your radio to a proffesional to have the talkback removed, but, if you really want to do it yourself, go to ghe following link and basically reverse what has been done.

http://www.cbtricks.com/radios/cobra/150gtl_dx/tsb/cobra_200gtl_dx_tsb_10041.pdf

This is the service bulletin for the addition of talkback to the Cobra 150GTL DX and the Cobra 200GTL DX.

As long as the talkback was added correctly, this can be put back origional.

If this does or does not help, please reply on here or email me at rollincbmods@yahoo.com. I look forward to hearing from you.

Dean
Rollin CBs
Mt. Vernon, TX

Feb 13, 2008 | Cobra 200 GTL DX 4-Channels Base CB Radio

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