Hi,
have a look at this one:
http://pa-11019.blogspot.de/2017/01/efhw-antenna-for-40-10m-qrp.html
It works as indicated in the measurements. I use it for the other bands
with the ATU of the Kx3 and Kx2.
73 de Hajo dl1sdz
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Cela est bien dit, mais il faut cultiver notre jardin.
There's an unavoidable tradeoff using an end fed wire with an ATU of
limited range. Since the ATU can't match the high impedance of a half
wave multiple, the lower impedance of the wire will lead to larger
ground/counterpoise currents. Even with a decent ground and/or
counterpoise, some
For general low-band operation, I use a doublet that is 75 feet long on
each leg, and fed via ladder line to a BL-2 balun near the shack. The
fifteen feet of coax to the balun is low-loss LMR400. The low-loss coax
helps with the high SWR problem, in that the losses are minimized (for
what I
Wayne,
I know what you are saying and agree. In very simple terms, if you
can load it, it will radiate. That was a position that a writer with the
nom de plume of Kurt N Sterba too in a book he wrote. By the physical
law of conservation of energy, it all has to go somewhere. And, that
I'd call an ad-hoc antenna that works on multiple bands with an ATU a
"Kinda-Random Antenna" (KRA). (Apologies to linguistic purists.)
A simplified definition might be:
A. long enough to work within the maximum limits of the ATU's L-network on
the lowest band used
B. presents a
I'd call an ad-hoc antenna that works on multiple bands with an ATU a
"Kinda-Random Antenna" (KRA). (Apologies to linguistic purists.)
A simplified definition might be:
A. long enough to work within the maximum limits of the ATU's L-network on
the lowest band used
B. presents a
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