On 1/8/2024 4:48 PM, Billy Cox wrote:
Paget, L. (2006). Antenna Workshop-Len Paget GM0ONX explores the W3DZZ
and says that it's a trapped multi-band antenna that shouldn't be
discounted. Practical Wireless, 82(4), 32-35.
W3DZZ was local to me when I lived in Chicago, and I met him near the
end of his life. He also built and sold inductively loaded antennas that
he correctly stated were not traps -- I measured some and they
self-resonated well above the resonance of the shorter length band. You
may be aware of the design -- a loading coil near but not at the end of
a dipole for the higher band, followed by enough wire that the coil
resonates on the higher harmonically related band. I've studied those
designs by others in NEC, and subsequently designed a few myself.
73, Jim K9YC
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