September 2012: Long-range FM & OIRT ducting

Autumn is well known as a perfect season for tropospheric ducting. First notable long-path ducting occurred this year on September 7, but it was just a short propagation. This time, good tropo conditions lasted much longer. Everything started in the evening on October 18 with strong tropo from Lithuania and Belarus. I also got some stations on OIRT band (66 – 74MHz) including Babrujsk (~650km, 73.01 stereo O=5-). Actually I don’t have any OIRT-dedicated antenna and my all receptions were made using Körner 19.3. Stations from Vilnius reached RDS & clear stereo signal (98.3, 102.6, 106.8). Although the distances were not so great, I have received some stations for the first time.

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Es STLs of 2012

Studio-transmitter links are typically placed below the CCIR band – somewhere between 50 and 87 MHz. They often carry a full MPX signal with stereo and RDS, so these signals are quite easy to identify. Italy has a very high amount of such transmitters. STLs usually are low power but they almost always don’t have a co-channel or adjacent interference during reception – this band is empty here. Since I have modded my XDR-F1HD I can receive also everything above ~60 MHz during Sporadic-E propagations. 

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