Hi All,
I agree with Glenn that 0 means non-directional in this case.
73
Dave G4OYX
On Friday, 1 May 2026 at 09:50:54 BST, df5sx.p11_t.online.de <df5sx.p11@t-online.de> wrote:
> re: which I think means non-direxional rather than due north <
BBC London Somali sce
13790 0400 0430 48 MDC 250 0=true north +10degr slewed ant_type157
Mon-Fri 290326 251026
Som MDG BBC ENC 858 SOMLA
157 AHR(S)2/4/0.8 ITU antenna type acc hfcc.org database list
000 degrees = mean includes +10degrees SLEW azimuth positively of 350
degrees real curtain azimuth:
see enclosed G.E. screenshot of March 2024 satellite picture:
MDG_ Talata Volonondry 18 45 15.04 S 47 36 49.42 E_350degr azimuth
b u t Real non-directional ITU antenna types are
925 HQ1/0.3 Quadrant antennas
935 HQ1/0.4
4-leg quadrant antenna
Designation: HQ n/h, where:
n = number of elements stacked above the other
h = height of dipoles above the ground in wavelength
The simplest form of quadrant antenna is represented by an arrangement
of two horizontal end-fed half -wave dipoles placed at right angles.
Another form of quadrant antenna consists of four dipole elements
in the form of a square and fed at opposite corners.
Quadrant antennas may also be stacked to achieve more
directive vertical radiation pattern and consequently higher directivity
gain.
or variations like
926 HQ1/0.5
927 HQ1/0.8
928 HQ1/1.0
929 HQ1/1.5
930 HQ2/0.3
931 HQ2/0.5
932 HQ2/0.8
933 HQ2/1.0
934 HQ2/1.5
# # #
975 VM8/8/120/3 vertical monopole
Designation: VM h / as / N / d, where:
VM : vertical monopole antenna
h : height of the monopole (m)
as : earth system radius (m)
N : number of radial wires in the earth system
d : diameter of the radial wires (mm).
A vertical monopole is considered to consist of an infinitely thin,
electrically short (less than a half-wave) vertical radiating element
erected on a reflecting plane.
To obtain efficient radiation from the antenna, if it is erected
on poorly reflecting ground, an earth system normally consisting
of a number of radial wires should be used. For the purposes of
calculating radiation patterns, it is usually assumed that the input power
is applied at the base of the antenna.
The vertical monopole provides an omnidirectional pattern on the azimuthal
plane,
however the associated vertical pattern is always significantly affected
by the ground constants as well as by other physical parameters,
e.g. the electrical antenna height, etc.
The presence of an earth system does not significantly affect the
geometrical shape
of the pattern, but it significantly affects the value of the absolute gain..
The vertical monopole will be considered in two basic conditions:
– above flat homogeneous imperfect ground, taking into account only ground
reflection;
– above flat homogeneous imperfect ground with an earth system consisting
of either a circular disk having infinite conductivity, or a number
of radial wires of given length and diameter.
(ITU Geneve ant table)
73 wolfie df5sx
wwdxc
-----Ursprüngliche Nachricht-----
From: Glenn Hauser via groups.io
Sent: Friday, May 01, 2026
Subject: [WOR] Glenn Hauser logs April 29-30, 2026; World of Radio 2345
MADAGASCAR. 13790, Apr 30 at 0419, S9/+5 talk in ? language. EiBi
shows BBC Somali M-F at 0400-0430. I always have a hard time
recognizing Somali; are there obvious keywords? HFCC shows 250 kW at 0
degrees, which I think means non-direxional rather than due north
(Glenn Hauser, OK, WOR)
This report dispatched at 0133 UT May 1
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