> Why does it need a gap in it?. It is an
> inductor and it has a resonant
> frequency. Use the coil with the frequency
> range of the antenna and tune to
> find the dip.
I can't believe I'm going to show such ignorance, but here goes: We had
"grid dip meters" when I was a kid. I think they were called this because
they had a vacuum tube in them. I think vacuum tubes had something called a
"grid" inside them.
I am assuming you guys talking about "grid dip meters" are not really
talking about these old devices. What is the modern equivalent? I have an
MFJ 259B, for instance. It is easy to get the resonant frequency of a yagi
element split and insulated in the middle. Can I use it to inductively
couple to a continuous yagi element or otherwise determine that element's
resonant frequency in any way?
Forgive my untechnical perspective, but the only reason I care about towers
and antennas is to make as many QSOs in radio contests as possible. This
has incidentally helped me conquer my fear of heights.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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