I'm about 200 km away from the next coast. The VLF transmitters can be received from anywhere.Are you close to the water in order to here these transmissions? Am presuming these transmissions are encrypted?
Actually, baumholder. I lived by landstuhl hospital. Was Army. Was my last duty station before retiring. Thanks for the info.
I retired in 95. The weather in baumholder was always goofy the 3 years I was there.
I don't have any radios that go that low. Besides your airspy, what other radios go that low? Just curious. Was stationed by lanstuhl from 92 to 95. Had a great time in Germany.
... or you can use your VHF receiver (125..185 MHz) for ULF..HF..60 MHz with an upconverter.A few older commercial tabletop receivers extend down to 10 kHz, the Bearcat DX-1000 will, the Sony CRF-1 will go lower still. I never had a Realistic DX-300/302 but I have heard that they do indeed receive these VLF frequencies.
I'm about 200 km away from the next coast. The VLF transmitters can be received from anywhere.
Yes, the transmissions are encrypted. Modulation is FSK, about 200 Bit/s.
In Minnesota you should at least receive your strongest VLF transmitter FAA Cutler at 24,0 kHz (FSK F1B, 200 Bd):
... and stations from Canada.VLF Transmitter Cutler
The VLF Transmitter Cutler is the United States Navy's very low frequency (VLF) shore radio station at Cutler, Maine. The station provides one-way communication to submarines in the Navy's Atlantic Fleet, both on the surface and submerged. The station began operations in 1913 as a radio...military-history.fandom.com
Great!With an RTL-SDR dongle, Ham It Up upconverter, and Boni Whip I was able to make out these five in December.
24 kHz Cutler ME
25.2 Lamoure ND
37.5 Grindavik Iceland
40 Ohtakadoya-yama Japan and
40.75 Aguada PR