Question about Cobra 148 GTL 120-Channels Base CB Radio

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On rx , i have a low carrier , sometimes cannot hear someone vs another radio

I own a cobra gtl ; it was modified years ago. for other channels . so when i had it hooked up years ago , as i do now, same problem. its not the hook up or antenna. because when isubsutute w/ another radio ; the other radios recieves well .i know its in the radio. i can hear some one w/ a 4 carrier , noise level at 1-3 . where the carrier should be at a 9 noise level at 1-3 ?

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Depends on how it was modded? Were both the TX and RX broadbanded and tetuned?? Possibly poor work..

Posted on May 25, 2008

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148 gtl cobra cb radio and the rx/tx light stay on


This sounds like a problem with the MB3756 Regulator IC. It controls voltage regulation and TX/RX Switching. It is a common failure in these radios. Check voltages with schematic that can be found at
CB Tricks Home Page

Sep 02, 2013 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Way low modgilation compared to the strong carrier on my 150 gtl


could be a bad mic cartridge or your radio needs to be tuned for more swing. Is it a power mic ? If so try changing the battery.

Jun 11, 2009 | Cobra 150 GTL DX Base CB Radio

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Check xtal X1 (7.3450 MHZ). It's in the am osc. I had exactly the same problem. I live in a highly corrosive coastline area

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

1 Answer

Low dead key on my radio


If it is a 142 GTL your A.M. power is VR6 . Good luck and be carefull and DON'T get carried away remember AT YOUR OWN RISK NO LIFE GAURD ON DUTY!!!! You should'nt have any problems though......Dan

Apr 01, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

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Feb 06, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

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

4 Answers

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Jul 03, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Can not recieve properly


IN your CB there are 25 tuneing slugs (square matal cans with
ferrite tuneing slugs) if you speaker output is low leavel but still
clear and free of hash the set should be ok , but you will need to tune these slugs with a small jewlers screw driver (WITH GREAT CARE) as the slugs break easy. If you want to email me it will not be a problem ,cheers , DENNIS FLYINGFOX@PEOPLE.NET.AU

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

1 Answer

Can not recieve properly


Mounted on the circuit board is a tiny black encased rx/tx
changeover relay. It is almost in the center of the board and one third to the left (facing the controls) and may be etched MRATA.
I would be looking at that. These sets are subject to a lot of problems as they age and can be fixed with a BIG HAMMER!!

CHEERS flyingfox@people.net.au

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

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