Many thanks to SWLing Post contributor, Carlos Latuff, who shares the following video of sounds he heard on HF. Carlos adds, “Are we in the Twilight Zone or Lost in Space? They sound like effects from a 60’s/70’s sci-fi movie!”
Many thanks to SWLing Post contributor, Rob, who writes:
I have a question about the digital signals I received today during what must have been an E skip opening to the southwest.
Can you identify by the bandwidth the wide signal in one screen capture vs. the normal FT8 signals which were decoding today quite well using the 7610?
Typical 6 meter band FT8 signals
Wide digital signal on 6 meters.
The wide signal didn’t decode in FT8 mode, but I have no idea what mode was being transmitted. Any idea?
Great question, Rob. I’m posting this because I’m no expert on timed digital mode signals. I recognize FT8, and assume this could be FT4, JT65 or similar, but the timing is identical to FT8. I’m sure someone in the Post community will solve this signal mystery in very short order!
Readers: Can you help Rob ID this wide, timed digital mode signal? If so, please comment!
Many thanks to SWLing Post contributor, Tom (DF5JL), who writes:
At the end of last year it appeared for the first time: a telemetry transmitter in CW on 7039.60 kHz. It always transmits at the 2nd, 22nd and 42nd minute of every hour. Every day.
Reception reports are available from Germany, the Netherlands, France and Greece. Three numbers and a V are transmitted ten times in succession, as follows:
During the day the values increase, in the afternoon they decrease. It is assumed that voltage values are transmitted here, i.e. “121V” would correspond to 12.1 volts. You can listen to a recording here:
Thank you, Tom.
Post readers: If you can shed some light on these transmissions, please comment!