NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Geoffrey Kolbe
Date: 2017 Sep 9, 09:23 -0700
Date: 2017 Sep 8, 21:51 -0700
The suggestion of shielding a GPS in a Faraday cage comes up here frequently. So I would like to tap into the knowledge of our shielding experts.
I have an electronic dog fence all around the property to prevent the dog from leaving it. (The kind that emits a radio signal for a receiver on the dog's collar). But I would like to leave a section open to enable the dog to pass through it. So I tried to shield 12 feet of wire with steel pipe and grounded it.That has absolutely NO effect. Zero. Why?.
Herbert Prinz
What is the range you have selected for activation of the dog collar? More than two metres? I have found that the selected effective range is usually conservative and actual effective range is more than this. You may need significantly more than 12 feet of pipe.
Too, the pipe may not be as well earthed as you think, particularly for the low frequency radio waves involved.
Geoffrey
