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     Re: Re: SDR   
     By: Ray Quinn to Nigel Reed on Sat Oct 11 2025 22:03:06   
      
    > Also, (In case you didn't already know) a receiving antenna the correct   
    > length will receive better than a random length one. It isn't nearly as   
    > critical, however, and one that is used to transmit.   
      
   Yup, that I did know.   
      
    > The antenna I use for my SDRs (as mentioned in a previous message) is is a 2   
    > meter J-Pole atop a 30 foot tower, along with others. The repeaters that   
    > they are monitoring (Cal Fire, US Forest Service) are scattered along the   
    > Sierra Nevada at an altitude of 5700 to over 8000 feet above sea level. My   
    > elevation here is less than 300 feet ASL. So reception is not usually an   
    > issue here.   
      
   I'd like to get an antenna high up but in the Dallas subrubs it might not be   
   such a good idea. First, I'd never be able to get anything else on it once its   
   up because, even if it's fold down, there's really no room and I wouldn't want   
   to be climing 30 ft in the air at my stage in life!   
      
   I could put something on my chimney but that would require quite a lot of coax.   
      
   I'll maybe get one of the local hams to take a look and give me their opinion.   
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