[SECC] ARRL 160 - KU8E

[Bill Coleman]

On Dec 4, 2005, at 12:53 PM, K4SAV wrote:

> If your feedline changes the resonant frequency of your antenna,  
> that is
> an indication that your ground radials are insufficient.  The resonant
> frequency of a vertical or inv L will change as a function of your
> radials, if you only have a few radials.  As you add more radials, the
> resonant frequency will stabilize and no longer move. Your feedline is
> acting as a long radial.

More radials will also make the antenna more efficient, as ground  
losses are reduced.

Placing a current choke at the feedpoint should also reduce currents  
on the feedline. But radials have larger benefits.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901