> When the snow covers the base of my 160M vertical the resonance point
> drops by about 20 KHz (from about 1830 to 1810) or so. Wet snow seems to do
> more than dry snow. Since the bandwidth is fairly narrow I do have to pay
> attention to the difference.
Is it a base loaded vertical? The base of the coil is a low impedance
point but the antenna side of the coil is high.... so proximity of
even a good dielectric to the element in a short base loaded antenna
gives a significant detuning effect.
My 10kHz wide 40 foot high base loaded antenna on 160m was super
sensitive to proximity of any object, dielectric or otherwise (me).
Dan
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