Radio Direction Finder Site

TM 32-5895-206-10

(2) The soil around the site should have high

conductivity to improve reception. Reception of frequencies

below 30 MHz will be greatly improved by high conductivity soil.

Moist soil (not wet) has better conductivity than dry soil; rich earth

has better conductivity than rocky or sandy soil.

(3) The site selected should be clear of sources of

electrical interference (e.g., high voltage lines, operating electric

motors, etc.).

(4) The immediate area should not have a large

number of obstructions. Locations near metal fences, buildings,

vehicles, or in dense forests may impair reception.

b. Radio Direction Finder Site. When using the radio

receiving set as a direction finder, choose a site which will give

uniform reception and which will cut down reception or reflected

signals. For accurate df bearings, the following conditions should

be satisfied whenever possible:

(1) The site should be a field which is flat for at least

150 yards in all directions from the set. Gentle downward slopes

are allowable for several times that distance.

(2) The site should be located on the highest level area

available in the general vicinity. A site in a sharply defined valley

is usually not satisfactory.

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