[TowerTalk] Feeding a Delta Loop

[Jorge Diez - CX6VM]

Hello Stu,

I have delta loops for80 and I notice that work better for DX if I feed in
an angle, for vertical polarization.

It´s not exactly at 1/4wl since when I tie the rope the wire go trough the
insulators, but works anyway.

73,
Jorge
CX6VM/CW5W

-----Mensaje original-----
De: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] En nombre de Stuart Browne
Enviado el: Miércoles, 03 de Febrero de 2010 06:28 p.m.
Para: TowerTalk at contesting.com
Asunto: [TowerTalk] Feeding a Delta Loop

I'm looking at installing a Delta Loop for 80 m. on my 75' tower. The low
end of the triangle will be about 20' off the ground ( the tower is on my
rooftop (flat).  I know that the conventional wisdom is a feed point in the
center of the lower side of the equilateral triangle which is around 50
ohms.  ON4UN describes feeding a DL at 1/4 wl from the Apex of the triangle
to achieve a 23 deg take off angle (which is what I'm after).

I'm looking for any "real world" feedback as to the pros/cons of feeding a
DL at the apex, lower center, corner or 1/4wl from the apex.

73's,
Stu
WH6H
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