From: wv8a@arrl.net.invalid   
      
   In article <1171322279.699704.122850@s48g2000cws.googlegroups.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   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)