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  • making loop ant

    From ecliptic@logicon@zipcon.com to alt.ham-radio.hf on Sun Mar 18 15:43:20 2007
    From Newsgroup: alt.ham-radio.hf

    Have a need to build a "small loop" antenna. Got some embroidery loops
    and got to thinking about things. I know it will increase the inductance.
    1) what would be the formula to calculate the length of wire for 10
    meters (or any for freq) if I wind the wire around the inside loop form instead of just along the outside surface of that inner loop?
    2) how will this effect the receiving nulls? will it reverse the normal sideways nulling?
    3) what would be the effect(s) if I wound around that inner loop but
    reversed the direction of the winding to have say 4 different windings
    on the same form? I know it would change the inductance but what about
    the capacitance and would it change that materially? What would it do
    to the bandwidth and Q?
    Ralph
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