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Sometimes an “4m antenna equivalent” can be bought on various auction sites (the labels are in one of the Warsaw-Pact members’ languages, often russian):

Continue reading “Warsaw Pact 4m antenna equivalent”

Decoding a 7-character ebnaut message on 6470Hz

On 3 June 2017 Stefan DK7FC did an 7 hour ebnaut transmission on 6470Hz with 7 characters. Previously i’ve been able to receive 2-3 character massages sent in a similar amount of time, however 7 characters seemed to be unreceivable. This article shows how the message was decoded, and may be useful to people starting to use linux and/or vlfrx-tools.
Continue reading “Decoding a 7-character ebnaut message on 6470Hz”

ZEVS on 82Hz or strange carriers on ELF

The Russian ZEVS station is probably transmitting on 82Hz. More information about the station here:

http://www.vlf.it/zevs/zevs.htm

https://en.wikipedia.org/wiki/ZEVS_%28transmitter%29 Continue reading “ZEVS on 82Hz or strange carriers on ELF”

List of milestones on VLF/LF/MF

Paul Nicholson has published a list of VLF (and some LF/MF) milestones:

http://abelian.org/vlf/amateur-radio/

It’s interesting to see the pace of advancements in this field. In 2010 receiving a carrier (with lots of power and a huge antenna) 900km away was a big achievement. In 2017 sending a short message using a much smaller antenna is normal.

Next tests in the 6470Hz band

In 22 and 23 april 2017 Stefan DK7FC did additional test ebnaut transmissions on 6470Hz. Similar to the previous tests, the transmission was decoded as usual by Paul Nicholson (850km) and also by Jacek SQ5BPF (900km). Continue reading “Next tests in the 6470Hz band”