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Do you hear static noise when you turn the radio on or is it complete silence? If static noise, is there an antenna on the radio and is it getting proper signal strength?
Bill, If the crackling and static are coming from the radio, it could mean 1) Something in your environment is putting out RF (radio frequency waves). 2) You have an old battery. 3) You are at the edge of the radio's range. 4) You have a bad speaker in the radio.
Possible solutions for you could be: 1) Have the radios reprogrammed to have Private Line (PL). This would block out RF noise on your frequency. Also, within the factory if there are devices putting out RF noise, there may be some solutions for them. 2) Replace old batteries. (Try a known good battery and see if it helps.) 3) Check to see if you have the same problem when radios are within a closer range. If it is a range problem, education yourself and other users to hold the radio upright (perpendicular) to the ground. You will get the best range. Tilting the radio can reduce range as much as 2/3s. Even the bodyfluid of a person wearing the radio can absorb range. 4) See if you have the same problem with another radio, or if the crackling static is just with the one radio. It may need repaired.
Another solution for you might be a noise canceling remote speaker mic. This would put the speaker of the radio up on your lapel. And these mics also have some noise/wind canceling ability.
There are a few programming things you could have your local dealer try. They may be able to tighten up the squelch and knock out some of the noise.
Read the paragraph labeled "CONNECTION" on Page 2 of the SP-MXG70 (last) part of the document.
Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
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.
The filter in the radio has gone bad or the antenna connection shield is not grounded properly. Electromagnetic interference is the problem. Difficult to run down. Try another radio to determine if it's simply the internal filter in the radio/audio head. If a different radio eliminates this noise, the problem is in the radio's filter. If the problem is still there, is't most likely in the antenna circuit.
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