ku8e at bellsouth.net wrote:
>I got it resonant on Saturday during the day around 1835 but when I added the
>extra 40 feet of feedline from my antenna switch to the shack it was resonant
>around 1750 again. ....
>
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.
Jerry, K4SAV
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