Why don't you cut the dipole in the center, add an insulator and feed it with
coax? Put a CM choke at the feedpoint if you insist and lose the ladderline and
tuner. Prune the wire length for resonance.
Wes N7WS
On 1/15/2019 7:15 PM, John Pierce wrote:
I haven't read all the comments on this thread and thus may requesting
redundant info. My antenna, for 40 mtr's, is a 67' wire up about 25'. I
have 30' of 450 ohm ladder line connected to the end of the antenna and
bringing the antenna into my basement. So I guess you could say that I have
a non-resonant end fed Zepp.
I can check the impedance at the end of the ladder line, where one side is
the antenna and the other side is connected to a ground rod at the point of
entering the house. I can measure the impedance of the antenna in the
basement, using Mini60 without an antenna tuner . The ladder line is then
connected to a MFJ 926B remote antenna tuner The tuner is fed by about 30'
of RG58 coax from my transmitter. When I see a reactive component to the
impedance of the ladder line, without the tuner connected, should I have
some choke inserted in one side of the ladder line or not? Should the tuner
be able to handle the reactive component?
John
AD2F
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