Fw: Re: Topband: inverted L favored direction

[Earl W Cunningham]

Cesar, PY2YP wrote:

I'm about to erect an inverted L this weekend following the W1BB
guidances (tnx PY2FUS). The vertical  portion will be 59 feet and the
horizontal will be 111 fet, it means 170 feet overall size. The soil
conductivity is nearly 15 mS/m which means average soil if memory doesn't
fail. In this situation, how will it perform? I mean max radiation angle
and Z point?"
==========
59 feet vertical and 111 feet horizontal would have max radiation at
about 35 degrees above the horizon, with a 2.15 dBi gain at that angle. 
The feed impedance would be about 29 + j251 ohms.  A 341 pF series
capacitor at the feedpoint would cancel the inductive reactance, leaving
a resistive 29 ohms.

You might also consider a resonant inverted L, which would be 59 feet
vertical and 78 feet horizontal.  The angle of max radiation would be
about 28 degrees above the horizon with a gain of 1.83 dBi at that angle,
and the feedpoint Z would be about 18 ohms without any reactance to tune
out.

73, de Earl, K6SE