Форум радиолюбителей ДВ

I congratulate myself on the anniversary)

Best wishes also from Nuernberg!

R7LP at DL0AO.

Hi Sergey,

looking at your screenshots, you seem to be struggling with a lot of local interference. I have wondered about the absence of 6.25 Hz Chayka lines, specifically 137775.0 Hz and 137781.25 Hz. Your closest station (Petrozavodsk) is only 270 km from Petersburg and ~ 240 km from Gruzino, so the lines should be visible strongly during day and night. Perhaps the noise blanker is over-active and cutting out the Loran pulses? You could also try to tune to 100 kHz and listen to the 1 kHz "dit dit dit" with AM demodulation.

73, Markus

RA4B was received also at DL0AO in daylight.

HGA22 is off air today.

73, Markus

but you can see DL7NN?

Hi Sergey, I think that DL7NN is indeed visible on the RN3AUS grabber, at the bottom of the "qrss-3" window, and only when the timing is right.
73, Markus (DF6NM)

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

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

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