Hello Lubos! Your report is noted (also saw it on dxsummit). A QSL-card is on it's way. Many thanks for this valuable report. Christer, SM0FAG has taken pictures and some video footage of the event t
Hello all, LF MF Here is a link to a Finnish MF-minded forum where I have posted some pictures of our MF station on the Uto (Utö) island expedition last month. The forum is in finnish but the picture
Hello Stefan, Thanks for the nice comments. The setup could certainly be improved by using more than the 4 radials we had. At resonance the feedpoint was 35 ohm. The antenna wire itself was about max
Hello Markus & LF 8.3 - 9 kHz became "regulated" in Finland after WRC 2012. When WRC 2012 was still in preparation I asked about the need for special permits regarding sub 9 kHz activities and the an
My wild bet is on RMP / Kaliningrad Naval Base. Before we moved down to 472...479 kHz I kept an ear on the proposed band over a year or so. Back then RMP made quite regular "RTTY" transmissions with
Well, well Stefan, I was playing with the thought of "leaky" power line or cable transmissions back in the days when 600 m opened up to a few select countries (but not here in "Kekkoslovakia" despite
Christian, LF "Ice is an insulator" If this is true it also means that all lossy trees in the surrounding may have turned into nearly insulators. Unless there is ice or frost on my antenna and insula
Hello Graham, Finland has 1000 Hz max. BW between 472 and 479 kHz. Germany has 800 Hz if if my memory serves me right, someone please correct otherwise. As a sidenote: On 2200 m we can use the full b
Hi! Isn't the mode most NDB's use called A3A (tone modulation with continuous carrier). A3J again is "voice AM", continuous carrier modulated by speech or similar non-digital information such as musi
Hi! OK, that was highly enlightening :-) So then, is threre a way to express the not so irrelevant difference between A2A unkeyed carrier and A2A keyed carrier using the current abbreviation rules? :
RMP / Kaliningrad Naval Base ? Listen for morse ID sent by FSK at beginning and end of transmissions. BR Paul-Henrik, OH1LSQ I presume this has been discussed before and I missed it. What is the orig
Hello Stefan, LF Your CQ's are 539 here on a Mini-Whip directly into the "demodulator" -chip on a slightly hardware-hacked RTL-SDR TV USB-dongle :-). The "hack" is just bypassing the VHF/UHF tuner-ch
Hello Stefan, LF Sorry, I missed your reply last night. Well, as for 599 +20 -signals I can only say that the whole LW and MW BC-bands were in the passband and same waterfall with you. I run the dong
Hello Graham, LF To be honest I have not tried other feeding methods for the AD than a trifilar 1:4 transformer. I used a beefier toroid (FT50-43) and more turns to get a XL of 200 ohms at 400 kHz fo
Hello Graham, LF I'm using the +I and -I inputs that were connected to the R820 tuner chip before. The 1:4 matching transformer is not my own idea, I just made my transformer a bit beefier than the d
