In my previous post (Ref.1) I examined how the RTL-SDR with the up converter can be used to receive the LF/MF/HF bands. Low power radio navigation beacons are located in the LF band and can be received by the RTL-SDR. Figure 1 shows a table of LF radio navigation beacons located in the Toronto area (Ref.2).
|Freq KHz||Call Sign & Pwr W||Location|
|248||KZ 50W||Buttonville, Ontario|
|257||TZ 25W||Gibraltar, Ontario|
|341||ZLP 40W||Meadowvale, Ontario|
|368||ZYZ 25W||Queensway, Ontario|
|391||OO 50W||Oshawa, Ontario|
|403||ZTO 50W||Woodhill, Ontario|
For comparison purposes, I used a Sony ICF-7600 shortwave receiver with a whip antenna, an SDR-IQ and RTL-SDR/UpConverter on a Buddipole antenna. Figure 2 is a video showing the results. Each station’s call sign is sent out in Morse code. The RTL-SDR is tuned to USB with a 1200Hz filter bandwidth and tuned 600Hz below the carrier frequency to put the on/off carrier 600Hz in the middle of the filter bandwidth.
#1 – “RTL-SDR for HF 0-30MHz”
#2 – “North American LW Radio Beacons”, William Hepburn
#3. – “Learn Telecommunications by Simulation”