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killing cars with RF?
In article .com,
"KE5MBX" wrote: Hi, What's all this business I hear people talking about blasting people's car stereos or killing cars altogether with high-power RF? I run 2m, 10m, and 11m in my jeep and I'd like to sort out the fact from the legend and find out what kind of power I can use without risking damage to my jeep or cars around me. At what power level is front-end overload to a nearby radio likely? At what power level is damage likely, and to what componets? I am currently using only 50 watts on a 5/8 wave (2m), 25w on a 1/4 wave (10m), legal 4w on a 1/4 wave (11m) Thanks, Nelson KE5MBX A few years ago. while in freeway traffic, my Chrysler minivan suddenly kicked into "limp" mode (no response, low rpm, second gear only), as a CB-er in a large van passed next to me. He had one of those stupid fat antennas with the gigantic "loading coil," and had to have been running a few KW for the Good Buddies. The auto companies are well aware of the havoc RFI/EMI can wreak on a vehicle's microprocessor-based control systems for engine, drivetrain, braking,etc., not to mention the entertainment and navigation systems. I once had the opportunity to see the RF testing lab at the tech center of one of the "Big 3." It was a pretty impressive array of equipment and testing environments, and they try to anticipate and head off "worst case" problems. ARRL has some good info on the subject: http://www.arrl.org/tis/info/carproblems.html Chuck WV8A Detroit MI |
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