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Сообщения - df6nm

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1
signal at 137550
G4SDG in FW5 (FST4W-300) mode.
73, Markus

2
Oh! So if you know where the light sensor is mounted, you could temporarily illuminate it with a LED, and switch off the QRM for a while ;-)

73, Markus

3
Finally in Hell ;-)  73, Markus

4
Thanks Alex! I also tried DFCW (which worked fairly well), and Hell (which looked a bit too weak). At what time will the street lights be switched on?

73, Markus

5
For some reason, spots do not reach the site spots.microwavers.es
The connection from the Ros-Opera network to microwavers.es seems to be broken (again). Recently only spots from DL0AO have appeared. There we use the same upload method as RN3AUS and IZ7SLZ.

73, Markus

6
Getting even better at 00:25 UT, with UI4A readable, and RN3AUS also twice on opds:
2024-02-23 00:23:37 RN3AUS  1790km 137533.044Hz   2mHz -47.8dBOp  83% 17.7dB
2024-02-22 23:23:37 RN3AUS  1790km 137533.047Hz   2mHz -41.6dBOp  93% 20.7dB

73, Markus

7
Strong Hell signal from R2BAS, DFCW from RN3AUS, and another trace on 137776.5 Hz.

73, Markus

8
Not a complete QSO yet. I saw the nice DFCW transmission from Bernd and decided to answer his greeting. We have both experimented with direct LF-signal generation from a CX31993 soundcard with 384 ks/s DAC, and used less than 1 mW radiated power.

73, Markus

9
  Не выходил я в эфир. Нет у меня передатчика. Не сделал ещё.

The UB1APE opds detection was a false one, triggered by one of the "little Chayka lines". These are spaced at 6.25 Hz/16 = 0.0390625 Hz around odd-numbered 6.25 Hz multiples, and are caused by a repeating data pattern in the 9th Chayka pulse. At the time propagation from Slonim (Belarus) was relatively good, and some of the "little lines" could even be found in our TA grabber slot.

73, Markus

10
Marcus last night
Frost... + 2 dB antenna current, plus maybe 1 dB less shielding.
Thanks for running your grabber!

73, Markus

11
For me, the current in the antenna strongly depends on the outside temperature

Here I find that when the trees are deeply frozen, the antenna becomes more efficient for two reasons: First the loss resistance goes down, allowing more current with the same power. Secondly, there is less shielding of the the elecrtrical fields in the environment, increasing the effective height.

73, Markus

12
Interesting. Reports for the reception of FW30 from DL0AO are sent to wsprnet a minute and a half before the end of the program

Yes we have magic powers and can look a little bit into the future ;-)

Actually the reason is that all decoders for the 2, 5 and 30 minute modes become active at the same time before the full and half hour, causing a large spike in the processor load. So we decided to shorten the 30 minute wav recording to 1690 seconds and start the jt9.exe decoder earlier. Theoretically this compromise sacrifices around 0.2 dB SNR.

73, Markus

13
Not a bad passer this night, once in QRSS-60 TA transmitted - so you can see it well. Once in Opds-32 and several times in FST4W.
Yes conditions were good last night, pity that WSPRnet is down. Also the 6.25 Hz Chayka lines from Slonim were unusually strong. In the 0.477 mHz opds window, we can even see a grid of little 0.39 Hz lines, caused by the periodically modulated 9th Chayka pulse.
73, Markus

14
Hi Sergey,
unfortunately this was a false detection. DN5TS has not been active since 2014.
73, Markus

15
FST4W uses the same bands as WSPR: LF 137.4 - 137.6 kHz (dial frequency 136 kHz USB), MF 475.6 - 475.8 kHz (dial 474.2 kHz USB).

73, Markus

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