Propagation Research

I was in the South Hill old gold-mining area of the Warrandyte State Park on Sep 30, 2013.

 

Sadly, no gold, but I did discover some interesting propagation during the mid-afternoon window, using the small Eton radio and a 2 m antenna.

 

IRAN

VOIRI has retimed many (all?) of its transmissions, which re now heard opening and closing ten minutes earlier, such as *0450 (instead of *0500) etc..

 

USA

VOA and RFA continue to operate to a complex schedule for their 21 MHz Chinese and Tibetan services for local daytime reception across Asia. At any given time, some services use different frequencies  on a rotating basis – different freqs for each day!.

 

Here are the results, looking at 11 MHz, 13 MHz, and 21 MHz, in the 0430 to 0530 window:

 

11820 – 11840

This spectrum block is now noted with in-band DRM transmissions in French from R. Romania International from 0500-0530*. This is a massive 300 KW, azimuth 285 degrees, effectively destroying use of this spectrum area by other broadcasters. The "centre" frequency is 11830. If it is really necessary to use  DRM, these transmissions should be placed well away from in-band channels!

 

13610 CHINA CNR1

13630 UZBEKISTAN CVC-Tashkent Urdu

13650 N. KOREA VOK French 0440

13670 CHINA PBS Xinjiang Uyghur 0430

13685 FRANCE RFI-Issoudin French 0445

13695 FRANCE RFI-Issoudin French 0500

13700 CHINA CNR13

13710 IRAN Turkish 0430

13720 UAE Sudan R. Service, Dhabbaya, Arabic 0430

13740 IRAN Dari 0430

13750 IRAN *0450 Russian

13760 N. KOREA VOK English

13765 MADAGASCAR VR-Talata French 0440

13775 TAIWAN SOH 0445. disturbed by serious wideband jamming extending from 13770 to 13795

13790 MARIANAS RFA Chinese

13820 TAIWAN Sound of Hope 0500

13850 EGYPT Arabic 0515, terrible modulation!

13860 GERMANY R. Farda, Lampertheim

 

21455 MARIANAS RFA-Tinian Chinese 0430

21460 PHILS VOA-Tinang *0500 Tibetan

21465 PHILS VOA-Tinang *0500 Tibetan

21520 IRAN *0450 Russian

21650 MARIANAS RFA-Tinian *0500 Chinese