From: mooregr@deletethisgreenms.com   
      
   "David Spain"  wrote in message news:87blh01l9x.fsf@eternal-september.org...   
   >Quite true. That's why most AM stations run lower power at night. At one   
   >time the FCC (the manager of the airwaves in the USA) granted exception   
   >to the so-called "clear channel" radio stations. Those used to be   
   >distingushed by their special 3 letter call signs: WLS, WGN, WBZ, KGO,   
   >etc. The "clear channel" station license allowed them to run maximum   
   >power (50kW in the USA) 24/7 into an omni-directional antenna. Which at   
   >night provided quite a distant signal. "Clear channel" meant they were   
   >the only station authorized to transmit on that specific AM frequency in   
   >the country. That was life back in the 60's and before. I don't know   
   >where all this stands today. I lost track of it all near the end of the   
   >80s. I believe I've read that "clear channel" exclusivity is a thing of   
   >the past.   
      
   They still exist   
      
   https://en.wikipedia.org/wiki/Clear-channel_station, though it's a bit more   
   complicated.   
   And amazingly for 80 years XEW-AM in Mexico City broadcast at 250kW. I'm   
   surprised you couldn't cook hotdogs with that. ;-)   
      
      
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   Greg D. Moore                   http://greenmountainsoftware.wordpress.com/   
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