Question about Cobra 148 GTL 120-Channels Base CB Radio

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Please tell me where the knobs and buttons should be set on my cobra 148. I haven't used it in a while and need to make certain all of them are correct. Thx.

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What is the AM power trim pot value for the cobra 148 gtl.


for amps esp solid state I set dead key at 4 watts, basically factory settings. cant tell u where located but plenty on line info. i have an older one i'm restoring. good luck. NightFlyer. Cessna 208 exh

Jun 08, 2017 | Cobra Radio Communications

1 Answer

I need schematics for cobra 148 gtl





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Regards, Tony

Oct 12, 2011 | 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

Hi cobra 148


Well if they have a Radio Shack it is the place, Corba 148 is a great radio. hope this helps..

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

1 Answer

I got a 142 cobra base i need to find 12 volt on the main board to put a trb-x2 (echo board)


look at the power knob inside the radio. With the face, facing you, it should be the tab on the left. Depending on what year it is it could be a pinkish wire..

That is the switched 12v off the power knob. Use a digital multimeter to make sure.

Oct 23, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

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.

Sep 15, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

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