XPost: sci.electronics.design, sci.electronics.misc   
      
   On Sun, 10 Mar 2013 02:43:08 +0000 (UTC), Cydrome Leader   
    wrote:   
      
   >>  Not many folks making hard coax runs anymore.   
   >   
   >this stuff was pretty darn old.   
   >   
   >are there power levels where they stil use wavegides and the like?   
      
   In countries still using analog TV, the UHF final amplifier is often   
   implemented with klystron in the 100 kW range. The waveguide is quite   
   large, due to the low frequency.   
      
   DVB-T digital TV transmitters typically operate with only 1-10 kW,   
   consisting of multiple redundant solid state modules, so there is not   
   much need for waveguides any more.   
      
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