Posted by
Martin Gillen on
Jan 05, 2006; 6:43pm
URL: http://elecraft.85.s1.nabble.com/T1-Antenna-Considerations-tp385235p385241.html
Hi, Peter.
Please excuse my ignorance I'm fairly new
to amateur radio ;)
But I have a question:
> The only reason that the "use the nearby bushes"
> construct now can be tuned by the T1 is that the
> impedance goes low because a part of the antenna is
> lying "on the floor" now, giving high capacitance
> against ground which allways lowers the impedance.
Yes, I understand that; any radiation from the
counterpoise is effectively lost into the ground.
However another antenna I have used is a 66ft length
of wire at 15feet, fed in the centre with 300 ohm
twinlead.
In this case, the driven half of the wire is still
33ft long - but I get really low SWR om 20m and have
worked DX with it,
So why does that work? Is the feedline doing
something to help me out here? Or is a dipole just
a completely different scenario altogether?
Thanks,
Martin.
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