[Elecraft] Good length off the antenna

[Irma & Linas(LY2H)]

Hello,
8,8m could be a good length for your pole to tune from 40-6 m. It is
important to avoid the half wave lengths and its harmonics on the operating
frequency because it will produce a very high ( kiloohms) impedance which
normal tuner won't tune. Unless you go onpurpously for a 1/2 lambda
monoband antenna. It is very effective , needs a very short counterpoise
but you need to have special tuner, even the simpliest one made of a coil
and a variable cap. If you want multiband with a internal tuner, the
mentioned length is ok for all bands. There is many I more good lengths ,
you may google it on the net. I use  8,8m + 8,8m of couterpoise on the
ground  with my KX2 tuner for the outings and I have a 43m end fed wire for
a fixed 160-6 m operation at home with multiple quarter  wave radials on
the roof.
73 Linas LY2H

<<<To: Elecraft Reflector <elecraft at mailman.qth.net>
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Date: Sun, 7 May 2017 10:24:14 +0300
Subject: [Elecraft] Good length for portable antenna
I'm taking my K2/10 to a school on Wednesday to do a demonstration. I
have a 10m fiberglass pole, and my plan is to hook a wire to it and
either lean it against something or bungee-cord tie it to a bike rack or
whatever is there. I will deploy a counterpoise wire on the ground.
Given that it is the middle of the day, I will probably try 20 or 17m,>>>