On 1/12/2026 10:46 AM, Tom Hellem wrote:
TT'ers:
I made a choke to place at the feed point of a 20 meter vertical dipole.
9 turns of #14 thhn wound on a 2.4" mix 31 ferrite toroid.
After I installed the choke, the resonant frequency appears to have
moved approx. 1 mhz lower.
Tom
K0SN
Could you explain what you are doing in detail. I don't understand why
you need an inductor (choke) to feed the dipole. What I have always
done is to build a 33 foot radiator pole and feed it from the bottom.
A simple L-C matching network at the bottom works fine with no radials.
73
Rick N6RK
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