Question about Cobra Radio Communications
Unfortunately, it's not quite that simple. There are several adjustments that need to be done to insure that you are not causing interference to others. Please take it to a tech and have it done right. Most people do not have the equipment required to do this properly. A good tech should be able to do it for you in less than 1/2 hour, and it'll be done properly.
Posted on Jan 12, 2019
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Posted on Jan 02, 2017
SOURCE: meter and St lights
The backlit nightwatch lights can not be repaired, they are fiber optic lights that are ran through the faceplate by the factory.
As for the squealing, the normal way talkback is installed on these radios is to solder a resistor, 68 oms up to 100 ohms, from the PA to the External speaker on the solder side of the PC board. The more resistance, the lower the talkback volume. Yourse is probably squealing because the resistor is breaking down, I just fixed a radio 2 days ago with the same problem. If you want to remove talkback, just open the case, flip it tothe solder side, and remove that resistor that was installed, or you can replace it with a new resistor and still have talkback.
The meter is fairly easy to replace, you just need to get a new meter, make sure it is one for the Cobra 29 (it will have the 3rd line to show SWR reading, which the Cobra 25 does not). You remove the case screws, the face plate screws, and then remove one screw and loosen the other that hold the meter inplace. You will have to solder the two wires to the new meter, observing which post they came from, this will determine the direction the meter swings. You just remove the light bulb and put it in the new meter casing with the rubber stay. This will be self explanatory when you open the radio.
Now for the dead key. It may have had a swing mod done, which drops the dead key down a couple watts. This is actually a good thing. If you have a lower dead key, this will allow you a larger range of power to swing. You can tell if it has had a swing mod by looking at JP36 to see if there is a jumper or a Capacitor installed. If there is a capacitor, the it has been done. To change back to factory, remove the resistor that was soldered to the solder side, across the capacitor, then remove the capacitor. Now just install a jumper in the place. Here is a link to the Modification Instructions, so you can get a better understanding:
If I left anything out, or you have more questions or need further clarification on anything, don't hesitate to email me firstname.lastname@example.org.
Posted on Aug 31, 2008
Still have the receipt? Take it back to the store and exchange it for another one. Easiest and quickest solution.
Otherwise, you can unplug the power from the radio and take the top cover off and check at the channel selector module to see if there's a broken wire or a broken solder joint. If the radio received rough treatment during some point in shipping (the outside packaging box may show no signs if it) it could be just a bad connection.
With the top cover off, replug the power and turn on the radio. BE CAREFUL IN HERE, THOUGH!! With a pair of insulated needle nose pliers, gently move the wires that connect to the channel selector module and see if it will light up. If so, disconnect the power and re-solder the joint or replace the broken wire. Reinstall the cover and reconnect the power, you should be good to go.
WARNING...if you open the cover on the radio, you cannot return it. Do this only as a last resort, if you can't return it for an even exchange for the same model radio.
Posted on Oct 25, 2009
ANL stands for "Automatic Noise Limiter" and NB stands for "Noise Blanker".
The ANL gets rid of a lot of interference noise caused by mechanical noise from motors and other electronic components in a car.
It also gets rid of noise from other sources of interference.
The NB is for extreme cases of noise, but can slightly lessen your receive sensitivity.
Basically both functions help decrease interference noise.
Posted on Nov 24, 2010
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