Question about Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

My cobra 148gtl sometimes will transmit and after a few minutes when keyed up will not transmit

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1 Answer

Mike Charette

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  • Cobra Master
  • 1,847 Answers

Try some canned air on the final to cool it down .If the radio comes on then you have the problem child.

Posted on Sep 01, 2014

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5 Related Answers

Benimur

Louie Role

  • 6966 Answers

SOURCE: cobra 148

Hi,

For most CB radios, some common components that fail and would cause a fuse to blow would be:
1. reverse protection diode located right after the power connector at the very rear of the board;
2. finals (2SC1306/7 or 2SC1969);
3. filter capacitor, 2200uF/16V;
4. audio amp IC located on the side of the chassis; and/or
5. 3 terminal voltage regulator (780X) or a zener diode.

Alternately, a wire (after the switch) might have been grounded.

Hope this be of some help/idea. Post back how things turned up or should you need further information.

Good luck and kind regards.

Posted on Nov 04, 2007

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Anonymous

  • 9 Answers

SOURCE: Cobra 148GTL Missing TX Modulation

The problem is most likely the audio ic . open the radio and see if the diode 44 is blown or see if you see anything that looks like it got hot around the plug area. if not contact me and i will buy it. is it an old or new 148 gtl.Read more

Posted on Dec 06, 2008

Anonymous

  • 1 Answer

SOURCE: 148GTL Cobra (no tx)

the dx 2527 has a fine ransmitter. it is choked out by the factory to pass FCC reg's. With about $4.00 in parts from the rat shack you can really make it talk. my personal 2527 dead keys around 3 watts with around 45 50 watts on rms with bird meter around 60 with crappy dosey.

Posted on Jan 22, 2009

Anonymous

  • 86 Answers

SOURCE: I have a cobra 148gtl that has 26 meg and high

VR10,,tuneL37,L38 you can remove TR24 it's for
modulation,but it may over modulat if removed.
that will get you started.

Posted on Oct 18, 2009

anymhz

AnyMHz.com

  • 500 Answers

SOURCE: where can i find a service manual for a cobra

Contact the cb shop @ 317 426 9649 They have copies of manuals for pdf type formats..

Posted on Aug 18, 2010

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