A nominal 2.5 kHz shift, at 3.575 MHz (0.07%), is about all I can detect.

Hi Frank,

Is this shift constant over all axial lengths, or variable?

73's
Richard Clark, KB7QHC

Hi Richard,

Axial extension 1.2" from antenna end -- Results as follows:

Extension Length (ft) Resonant Freq. (MHz)

0 3.5765
5 3.576
10 3.575
20 3.574
50 3.5725
100 3.5720

For a total shift of 4.5 kHz (0.125%) from zero to 100 ft

73,

Frank