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Old October 22nd 07, 11:48 AM posted to rec.radio.amateur.antenna
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Posts: 182
Default Testing earth stake efficiency


"JERD" wrote in message
...
I am wondering if anyone can enlighten me on how to test ones earth stake
efficiency?

The only item I am aware of goes back a real long way and that is the wind
it yourself megga tester!

Any modern ways of doing it these days or does one just hope for the best!

Am using an 8 ft galvanized rod.

JERD
VK5JE


JERD

There is a specific instrument called a three terminal earth impedence meter
used to measure earth impedence. Three electrodes are driven into the ground
at set distances and the earth impedence is measured directly by the meter.

This equipment is intended to ensure that a sufficiently low impedence
exists for safety electrical earth connections to operate fuse, circuit
breaker or residual current devices reliably. Most professional electricians
will have such a device (or at least know where they can get hold of one).

An earth connection that is satisfactory for electrical supply safety
purposes may not necessarily be adequate for RF use.

Mike G0ULI

 
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