Subj : Re: SDR
To   : Ray Quinn
From : Nigel Reed
Date : Mon Oct 13 2025 12:24 pm

  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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