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Having a problem with cobra 148 my exsteral speaker is nt working it about 15 yaers old but a good radio

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Take the plug end out and reinsert it.....

Posted on Apr 23, 2010

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1 Answer

Having prob with modulation on am


Several questions. 1) do you have it connected to antenna with good coax?2) did you check your match on the radio with an SWR meter? What kind of match do you have,is it below 3.0? If it is that high get down to around 1.5 - 2.0 and others should be able to hear you.

Sep 13, 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

1 Answer

I have a Cobra 148 mounted on the hump in a pickup truck and it works fine. Then I plugged in a old Turner +3 desk microphone and I get bad feedback when it is keyed up and I can also hear my voice thru...


You're most likely getting lots of RF feedback from the metal cab of your truck,combined with the real sensitive nature of the amplified Turner mike.I would put an old original Cobra (coffin mike) handheld mike or a Astatic Roadking 56 (RK56) on it.They are really hard to beat,especially when you have lots of feedback & squealing. I also have a 148GTL (malaysia made) that has a Turner +3 deskmike & it squeals in my truck but not in the house. The 148GTL has given me better service than ANY other radio I've owned.It has 120 channels (freeband) & upper & lower sideband. I think mine is a 5pin Cobra-type plug-in. Try a simpler mike & good luck. Squirrly

Mar 13, 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

I have a new cobra 148 with ssb, about 6 months old, while i was away there was a storm, now the radio doesnt work , recieve or transmit, i also have a cobra 29 ltd that wont transmit but it will recieve....


make sure the mic is good. If for some reason the mic went bad, it will not receive or transmit.

As for the one with no receive, it most likely needs a new final.

If lightning hit your antron, it would be in pieces.

Aug 02, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I have an old cobra hooked up worked fine the the


Sounds like you could have a bad soilder joint in the radio. If you hit the top or bottom of the radio does it help? If so its soilder. You match your antenna to your truck not the radio. You might want to recheck it.

Jul 18, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Need assistance on finding how old an item is..


Where the unit was made is a good indication of how old it is. If it was made in Taiwan it is real old. Philippians is after that and Malaysia is the newest.

Other then that you can contact Cobra directly for them to look up the serial number.

Cobra website.

Jun 06, 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

Cobra 148 GTL steady tone though speaker


try rerouting your coax cable and make sure it's long enough

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

5 Answers

Cobra 148 gtl Low / No receive audio


No audio out / low audio out....This is a constant problem with the COBRA 148 gtl....to get a good level of volume replace the
electro caps ...start around the two speaker wires and work back from there. I'm in the process of rebuilding a 148 gtl and have found caps that are leaky and dried out...after replacing nine the volume went up to a good level...now i need to fix the distortion
and background hash. Did you know that there are many posts
on FIXYA about this same problem I.E. great TX , great PA but poor , or no audio out. these sets have been made in sevetal countries...The sets made in Taiwan or China have poor quality
front panel pots (the carbon track is micro thin and simply wares through to the material the track is printed on) This has the same effect as removing a wire from a pot I.E. no audio. The good news is that 99% of parts in the radio are freely available and that includes the front panel controls. ONE WONDERS IF THE SET IS WORTH THE EFFORT !!!

CHEERS GUYS / GIRLS.

Nov 26, 2006 | Cobra 148 GTL 120-Channels Base CB Radio

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