Topband: Measuring field strength (for the purpose of radialevaluation)

Tom Rauch w8ji at contesting.com
Fri Dec 22 21:59:43 EST 2006


> My method involves relative measurements. In this case we 
> are comparing X
> number of radials versus Y number of radials. As one adds 
> radials on a ground
> mounted vertical, the feedpoint impedance will decrease as 
> the ground losses are
> lowered. So, one adds radials and measures the feedpoint 
> impedance. When the
> impedance stops decreasing it is time to stop adding 
> radials.

As measurements show that doesn't always work. FS can keep 
changing even when feed impedance does not change.
Seen it happen many times.

73 Tom 




More information about the Topband mailing list