----- Original Message -----
Sent: 18 January 2006 12:14
Subject: LF: OBS
Hi Alan and Co
Just for intrest. I monitored 136.9 khz last
night around 2000z and observed CT1DRP, who was a good signal on my vertical
antenna. I then switched to my 80m vert loop which is broadside on to Brian,
and saw absolutely nothing.
This is to be expected I suppose since the loop
is max East/West although I did expect to see something, even very
weak.
My noise level at the time on the
vertical measured 69.5 db and the signal from DRP 41.3 db indicating
a signal over noise of 28.2 db.
Since I am the most northerly station active
on LF from the UK and the greatest distance from DRP I thought the
info might be helpful to you with your observations. Someone else might have
recorded some info at the same time in EU.
One other observation. On my vertical the
Rugby qrm signal is fairly consistant but with the loop it fades in and
out, but again Rugby is south from me and min sig pickup, for example the
display is absolutely clear of qrm then suddenly lines appear from Rughy and
after a very short spell they disappear again. The angle of arrival and
direction could be changing with propagation changes, or maybe my vertical is
having an effect inducing the Rugby signal into my loop at
times.
I suppose it is important when making
propagation observations to consider antennas used for both transmitting
and receiving at the various places. Since in the amateur service no two
stations are using the same power and antennas it is difficult to come to a
meaningful conclusion.
Good luck with your propagation data
experiments.
de Mal/G3KEV
