To: rsgb_lf_group@blacksheep.org Date: Wed, 18 Jan 2006 12:14:19 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Subject: LF: OBS Content-Type: text/html; charset=windows-1252 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit

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