Bill Horne wrote:
I'm experimenting with antennas, and I'm going to model some on my
computer, but I need to know the ground conductivity at my QTH.

How may I measure this without special-purpose instruments?


From an ARRL Handbook

You drive 4 rods into the ground 18 inches apart in a straight line.

You have a 100 watt bulb in series with a resistor that goes to the near
rod, the other side of the bulb goes to one half of a 120 volt line.
The other side of the 120 volt line goes to the farthest rod.

If the bulb lights brightly, then rejoice! You have great ground.


Here is the more detailed link

http://amfone.net/ECSound/K1JJ12.htm


Needless to say, you're operating with some voltage here, so care is the
watchword. Keep in mind that conductivity is constantly changing, so the
best we can hope for is a rough idea anyhow.

Now a simpler way to do all this, and much less dangerous, is to use
maps like the one at:

http://www.fcc.gov/mb/audio/m3/index.html



- 73 de Mike N3LI -