[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index] Re: CB radio noise (No Audi stuff)
> Try a SWR meter sold at a RADIO CRAP "shack", to match your annt to your > radio. > > Chewy > FCC aproved > Beg to differ with these suggestions. Matching the antenna to the load will do virtually nothing to eliminate electrical noise. Instead, determine where the noise is coming from. If it is line (DC power) noise, you will still have it when the antenna is disconnected. If that's the case an inline (series) inductive filter (coil) on the positive lead and an electrolytic capacitor across (parallel positive to negative, red to black) may reduce the noise. you can get these at rat shack, as well. If the noise is much worse with the antenna connected, that's a tougher problem to resolve. Make sure you are using resistive spark plugs for noise supression, and that you have no loose metal to metal connections in the engine compartment or anwhere else. Even loose muffler and exhaust connections can generate considerable electrical noise. With the engine running, turn the radio on and note the noise level. Now, get out and lift the hood. Is the noise worse? If so, most of your noise is probably coming from under the hood. If not, it may be coming from somewhere else. If you have enough antenna lead, you can sit in the car (while it is running) and have a friend walk around the car holding the antenna a foot or two away from the car taking note of where the noise is worst. I suspect it will be worst at the front of the car, especially if the hood is open. There are other things that can be done, but suggest you try these first. BTW, you _should_ match your antenna with an SWR meter. Try for a match of 1.5:1 or better. That will improve your transmission efficiency, but *not* lower noise. --Kurt 1987 5KCSTQ ______________________________ Kurt Wesseling Technical Support Center The Education Network of Maine 800-696-4357 ______________________________
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