Re: VLF: DK7FC close to SAQ

[DK7FC <selberdenken@posteo.de>]

There were a number of interruptions. The carrier stopped arround 4 UTC. It was restarted arround 9 UTC but stopped again 20 minutes later. The reason is heavy snow which triggered the safety function. I disabled the function manually and observed the antenna current. It dropped down to 500 mA during the snow, -6 dB. Now it is back since 14 UTC at 1 A. I hope it will hold some time so we can see more traces on the grabbers...

In the afternoon a DFCW-90 transmission was done over to DL0AO in 226 km distance. Markus may report...

73, Stefan

Am 01.12.2017 01:08, schrieb DK7FC:

...there has been an interruption of the carrier between 23:00...23:50 UTC. It is now back with opposite phase, i.e. the same phase as during the 700 mA test.
73, Stefan

Am 30.11.2017 22:21, schrieb Markus Vester:

Hi Stefan,

good to see the carrier back, I've already been missing that cheerful green trace on DL0AO ;-)

But it looks like the phase is inverted now. Did you happen to change something about the pickup probe circuitry? A more likely explanation might be that the SpecLab PSK has unintentionally been enabled (a = 0 or 1, bypass factors 1 or -1). It would be nice to have the phase back where it was...

Best 73,
Markus 


-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Do, 30. Nov 2017 21:44
Betreff: Re: VLF: DK7FC close to SAQ

Hello VLF,

The TX was switched OFF at 19 UTC, so the carrier was on air for 116 hours :-)

Since 20:30 UTC it is now back at 1 A antenna current, 3 dB more. The QRG is still 17.470100000 kHz

73, Stefan