Has anyone tried either method? (That is,
direct connection of halfwave end-fed or tapping an inductor.)
Hi Mike,
This topic comes around every few months, so you can find a lot of
knowledge - both theoretical and practical - by searching the TenTec
and QRP-L archives for 'End Fed Halfwave' or 'EFHW'.
Most EFHW antennas use either an impedance transformer wound on a
toroid (Steve, AA5TB), a parallel LC with a tapped L (Don, W3FPR), or
a series L / shunt C matching network (Steve, KD1JV). My apologies if
I got the references wrong.
All the above methods work. I have not done enough work with EFHW
antennas myself to draw my own conclusion yet, but my *impression* is
that it's a convenient antenna for portable use, but not as good as a
conventional dipole (which is not as convenient to set up as a simple
wire). I'm sure you'll get a variety of responses because this seems
to be a favorite topic.
73,
ed - k9ew
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