Question about Cobra New-29 WX NW ST 40-CHANNEL NIGHTWATCH CB RADIO WITH SWR CALIBRATION & 7 WEATHER CHANNELS - CBR29WXNWST
I have changed the grounded and the power sources and it still does it or it just doesn't do anything.. I put the plug in the back into it while the on/off knob is off and it would turn on automatically...
The weather channel board is causing that.. turn the weather channel selector to OFF
Posted on Nov 18, 2014
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Posted on Jan 02, 2017
SOURCE: Cobra CB Radio 148 NW ST
The first thing to do is to check if your power wire actually has power to it. Do this with a test light or a multimeter. Given that the wire is powered, check to make sure your ground is good. Modern cars have so much plastic in them that grounds may be hard to find. The next step is to check the rig's fuse. Make sure the microphone is plugged in, too. If none of this helps, your radio needs repair or replacement.
Posted on Feb 17, 2008
You should always connect the CB directly to the battery as the accessory socket is full of noise. You also should choose a better antenna as these small glass mounts cannot hear signals well and magnify local noise. AM (CBs) radios naturally pick up noise as it is the nature of AM signals. Use your squelch to lesson this but too much can knock out you reception.
Posted on Feb 14, 2010
These radios are constructed in a cheap way, not that they are bad radios, but the manufactures try to keep expenses down and the quality sometimes suffers. The problem may never show up but then there is a radio that just drew the luck and got the weak part.
The off and on switch controls the B+ line to the whole radio with a few parts placed before the switch. These parts prevent or limit the reverse polarity damage if the radio is hooked up "backwards". If it is a good design it works but cheapened line radios are not likely to prevent this.
The switch itself could be "welded" in an on state and I would suspect that the polarity diode is fused with possible addition of a filter capacitor. I cannot say anymore as I do not have the radio in front of me.
Posted on Feb 21, 2010
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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