Introduction
Over the last twenty years many countries dropped their short wave broadcasting service in favour of streaming over the Internet. Personally I feel this is a pity especially since we are now in the peak of Solar Cycle 25 with excellent propagation (Refs.1/6). HF still offers many benefits and the short wave bands are still active. Using various data bases one can easily identify a station. Stand alone references (Ref.7) can be used without internet access, or on line data bases (Refs. 8 & 9).
Receive Block Diagram
| Frequency MHz | 17.790 | 17.855 |
| Relative Noise Level | -110dB | -110dB |
| Signal Strength | -80dB | -65dB |
| SNR | 30dB | 45dB |
| Tx Location | WRMI Okeechobee, Florida, USA | RTVE Noblejas, Spain |
Figure 1 shows the receive block diagram. In this case I am using a new desktop computer running Windows 11 with Spectravue software. My receiver is an SDR-IQ with an HF Buddipole antenna. I selected two stations as shown in Fig.2 to identify using an on line data base Ref.9. Fig.3 is a YouTube video showing how the lookup was done.
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References
#1. – “RTL-SDR for HF 40M Band Scan”
https://jeremyclark.ca/wp/telecom/rtl-sdr-for-hf-40m-band-scan/
#2. – “HF Solar Eclipse Propagation”
https://jeremyclark.ca/wp/telecom/hf-eclipse-propagation/
#3. – “RTL-SDR for HF WWV Propagation”
https://jeremyclark.ca/wp/telecom/rtl-sdr-for-hf-wwv-propagation/
#4. – “RTL-SDR for HF Beacons Propagation Predictions”
https://jeremyclark.ca/wp/telecom/rtl-sdr-for-hf-beacons-propagation-prediction/
#5. – “Major Solar Cycle 25 Geomagnetic Storm”, June 2023 ARRL QST Magazine
#6. – “Experience the Wonders of Solar Cycle 25’s Solar Maximum”, May 2023 ARRL QST Magazine
#7. “Klingenfuss Publications”
https://klingenfuss.org/homepage.htm
#8. – “Short Wave Database”
https://shortwavedb.org/
#9. – “Short Wave Info”
https://www.short-wave.info/
