What size inline fuse for a cobra 148GTL radio ?

SOURCE: cobra 148GTL

Hello k007,

It sounds like you may have damaged the RF power amplifier stage of the CB. Since you were adjusting the antenna characteristics. Did you have a SWR (Standing Wave Ratio) meter connected while you were tuning the unit? If you did you might have noticed the needle go past the 1.2 mark when you were adjusting the antenna or the unit itself. In any event I think that the RF power Amp is shot.

Thank you,
Shuttle83

SOURCE: fuse

Hi,

There are only a couple of components that could cause the fuse to blow. They are:
1. Reverse protection diode (D23)
2. filter capacitor (C123)
3. Outputs (TR14 & 15)
4. Audio Amp (IC4)
5. Zener Diodes (D22 & 19)
6. the fuse itself (it should be 2 Amps

Hope this be of help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FIXYA.

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

SOURCE: have cobra 29 nw ltd keeps blowing fuses inline

This is an easy fix if you are comfortable soldering.

You must have hooked it up backwards. Big problem when using a cigarette lighter adapter. You have to be careful, if you hook a radio up backwards you blow the polarity protection diode.

• Go to radio shack and buy an N1004 diode.
• Open the radio
• Look towards the back right of the radio for a black diode D23. it will probably look burnt, but not always.
  
• Use a soldering wick to remove the solder holding the diode in.
• Remove it, and replace the diode making sure its going in the same direction as the old on. Strip on the side the triangle is pointing.
• Solder it in.
• Test the radio

SOURCE: What size inline fuse do I need for a Cobra 75 WX

2 amp