Question about Cobra 148 GTL 120-Channels Base CB Radio

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

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I have a brand new cobra 29 LTD Classic with a cheap $12 antenna and when i talk to people all they here is a squeal unless i put my hand on top of the cb and it stops squealing? I can here everyone else fine, but they here a squeal what could be the problem

Posted on Jul 23, 2010

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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.

Posted on Dec 11, 2009

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Related Questions:

2 Answers

148 gtl receive works fine transmit has no power


Have you checked the 2sc2166 or the 2sc1969? Those are the RF Driver and the RF Final output transistors.

Jan 07, 2013 | 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

2 Answers

148 gtl receive issues


The problem is in the audio output chip usually bolted to the inner chassis. Sometimes the chip developes a hairline crack, replacement recommended.

Mar 14, 2012 | Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

I want to power my cobra 148 GTL in my home, want kind of inverter would I need to do this?, (watts)


you would probably want at least a 4watt continuous power supply or better. do not use as switching power supply.

Oct 23, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Cobra gtl 148 seems to have no power til i push on mic connecter.


cobra 148 shows no wattage output on external meter but does show good modulation.

Dec 08, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

My cobra 148 gtl-dx has excessive levels of white noise that effect even relatively close stations incoming signal. is there any way i can vary or reduce the ferocity of this white noise


goto you tube and type in cobra 148 gtl dx and look for video by the cobraman in the uk - or type in the cobraman - u can contact him and he is a bit of a genius on this radio - he will even make a video and show u how to fix prblem

Jul 06, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

148 GTL PROBLEM


sounds to me like the final driver is blown, try replaceing it with a new one.

Apr 24, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

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