LF: Re[2]: VLF: EbNaut message over 2877 km, DK7FC to RC4HAA

[Alex K <rn3aus@gmail.com>]

Hello VLF, Stefan, Andrew!
Fantastic achievement! Congratulations to Stefan and Andrew!
Very high Eb/No for this distance!

73!!

Понедельник, 6 ноября 2017, 18:50 +05:00 от DK7FC <selberdenken@posteo.de>:

PS: The RX at RC4HAA is a 100m long wire with a passive RC filter and an isolation transformer, i.e. no preamp is used. So it is a pure E field RX hanging in the middle of a city with a population of > 1 million people.

Am 06.11.2017 14:34, schrieb DK7FC:

Hello VLF group and RC4HAA team,

I am glad to report about the successful decode of my 1 character EbNaut message on the VLF RX site at RC4HAA.

This is a land path distance of 2877 km, http://k7fry.com/grid/?qth=JN49IK00&from=LO53CF34

So far the best DX between Germany and Russia below 9 kHz.

It is my new personal ODX on VLF (the old ODX was just 4 km shorter).

A screenshot of the decoder result as well as the log file is attached. The unexpected good SNR suggests that even longer messages are possible within a single night. Also we need to consider that it was a very noisy night again, with thunderstorms in Spain and Italy.

A new message announcement will follow soon, next time i'm trying 2 characters.

73, Stefan



Am 05.11.2017 17:59, schrieb DK7FC:

VLF, 

Tonite i'm trying to transfer a 1 charcter EbNaut message to RC4HAA:

f = 8270.1000 Hz
Start time: 05.November.2017  16:51:00 UTC
Symbol period: 180 s
Characters: 1
CRC bits: 6
Coding 8K19A
Duration: 12h
Antenna current: 600 mA

If someone else wants to try, dont hesitate...

73, Stefan