VK2DX Amateur radio website Notes about various LF / VLF activities, mostly related to reception and decodings of NAVTEX, NDB, QRSS, WSPR and time signals from a small city lot in the heart of Sydney, Australia. VK2DX Urban Grabber 518KHz Logbook NAVTEX HF schedule, 09/2011. NAVTEX signals NMC Point Reyes, California Fishnet Beacons Also known as Drift Nets or Fishing Buoy are low power transmitters which send periodic Morse code signals. They are battery powered and use fairly inefficient antenna, yet they can be heard for hundreds or even thousands of miles! German weather station DDH47 [147.3 KHz] Hungarian utiltiy station HGA22 [135.430 KHz] German utility station DCF39, DECODED [138.830 KHz] JT65 QRPP : 10 milliWatts two-way QSO with ZL3IN. WSPR reports. Personal WSPR record 10 microWatts to VK4 ! With the arrival of Tronson RF attenuator model RA1728A I was finally ready for more low power experimenting.743 Km with 0.00001 Watt! "Cluster beacons" are single letter ID Morse code beacons which transmit in parallel on frequencies 100 Hz apart. Cluster beacons are simple 'radio propagational' transmitters used to find the most suitable frequency based on current HF ionospheric conditions. NDB DXing Chasing non-directional beacons (NDBs) is my favorite low band activity! I've spent countless hours digging up those weak signals, waiting for exotic openings. Logging a new NDB is always thrill! My current total is 324 with best DX LLD-335 from Hawaii, 8,180Km. Other DX include beacons from Japan, Taiwan, Indonesia, Brunei, Cook Island- to name just a few! Check out my NDB Logbook and give it a try - you'll LOVE it! Receiving, identifying and decoding time signals is an interesting and sometimes challenging aspect of amateur radio. Time signals have unique spectral 'foot print' which makes them very special! 73, Nick VK2DX