[time-nuts] Toy radiolocation and LORAN envelope
gzimmer at wideband.net.au
Tue May 27 06:40:24 EDT 2014
> The angle could be found with a directional antenna or inerferometry, but about
> the distance?
About the only reliable way to locate hidden transmitters is by field
strength. The problem in built-up areas is reflections.
At one time Doppler DF systems were popular, but anybody who has used
one will tell you they are usually more trouble than they are worth.
A simple beam or dipole is useful, but only when out in the open country
By simply gridding the area, and drawing a field strength map, you will
soon cut the location down to a small area. Then with a field strength
meter you can walk right up to it.
When doing professional DF work, I would use a scanner with an external
S-meter and an effective attenuator in the antenna lead.
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