Question about Cobra 148 GTL 120-Channels Base CB Radio

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No transmit or recive but works on pa mode

I have a 148 that i got a few days ago it has been tuned and peak out and has a connex board in it, radio was working great low key up power with a lot of swing to it, i talk on it for a couple of days and this morning, when i started my truck back up this after noon the radio came on as soon as it did i lost all transmit and recive but the has power and works on pa mode, I have the skill to repair just need to know where to start,please help

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Re: no transmit or recive but works on pa mode

Does this radio have freq? if so you could have turned on causing
a miss alignment with antena.. check all the switches move into different positions and keep keying up, good antena connection?

Posted on Dec 04, 2007

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1 Answer

I have cobra 29 LTD that will power up, but wont talk or receive.

First make sure the switch on the front is not set to PA or Weather if the unit has the weather featurre.

Then look to see if the receive/transmit meter is showing any movement in either mode.

You had a Connex board installed? I bet that is wired wrong or a wire came off in the process

Do it yourself installation or a "expert"?

Dec 07, 2012 | Cobra 29 LTD CB Radio

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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

How do peak and tune my 4300 dxl

modulation cut r249 & r246 these are limiters no limiters loud modu this radio is the same board as the 3300 connex
am low power adj vr 13 high power L 32 L 33

Jan 28, 2011 | Connex 4800-DXL 480-Channels Base CB Radio

1 Answer

I have a cobra 148gtl it will not recive or transmit but it does light up

hello from my experience of this problem you will have to replace the audio and pa trancisters

Jan 07, 2011 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

My connex 3300 wont transmit anymore and the talk back wont work either,i have tried a different mike and when you key it up the meter still won't swing.

Plug in an external speaker to the pa jack ... Switch the band selector to pa and see if you hear yourself... No? Bad audio chip

Dec 29, 2010 | Connex 3300 240-Channels Base CB Radio

1 Answer

Would like to peck recive on connex 3300 Wild Bill

peak receive? Not sure what you mean. You don't peak receive.

If you want to align the receive, then you will need some specialized equipment. Oscilloscope etc.

Jan 15, 2010 | Connex 3300 240-Channels Base CB Radio

1 Answer

How do i peak my connex 4300hp?

They probably still have more experience then you do! You should be okay as long as you tell them that you just want a basic peak and tune. Nothing crazy. If you ask for super mod of some kind then you will end up with a radio with problems.

You can also send it out to have it peaked and tuned.

50 watts isn't bad tho. I have never worked on a connex and don't know much about them so I couldn't tell you who to peak it out.

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4 Answers

Connex 4600 Turbo

i have the same radio turn talk back off and there is enough power ull have talk back through you trucks radio speakers and it needs to be hooked up to the battery with at least 12ga wire

Feb 10, 2009 | Connex 4600 Base CB Radio

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