Dear Stefan, A big thank you for all the fascinating experiments you are leading. I have been trying to receive your sigs from the very early stage but was'nt succesful so far. However, this time, i
Hi Stefan, Check out http://www.aade.com/filter.htm for a good & free filter design tool. It does support coupled resonator band-pass filters also. Coupled Resonator band-pass filters are likely to b
Hi Graham, Here is the full log of the night. I saw your MF7 transmission and switched to MF1-7 lately. Conditions was poor with medium/high level of QRN RX1: 20:10 @ -5.9 Hz: CQ DE G0NBD G4)1VD <CAN
Hi Graham, First time copy of your CMSK8 beacon ... Too much QRN last night did not allow any copy at all. 73, Michel - F5WK Attachment: G0NBD_CMSK8.gif Description: GIF image
Andy, I found on the web a few interesting pages of the book: "Research on the DDS to Generate MSK Signal" < http://books.google.fr/books?id=ITOlbhvbAbQC&pg=PA36&lpg=PA36&dq=MSK+DDS&source=bl&ots=wcQ
Hello Stefan, I was using the "standard" 9kHz_4mHz settings from Markus. So the noise blanker only was active. Unfortunately, I saw Wolf's message about the hard limiter after your transmission. Afte
Hi Graham, LF, What about asking for a mod allowing support of a DDS ? MSK/CMSK has only two tones, whose frequencies are known. Therefore only one bit of information is required for one symbol. The
Hi Stefan, Distance between JN49IS and JN18HP is nearly 459 km. Yes sure, and I'm already thinking to further improvements to the whole setup ! Michel - F5WK locator JN18HP 30 S/E Paris
Not by much, can't tell for the moment. However, CMSK8 signal has to be very visible in the waterfall to get a good decode and tuning is not that easy to say the least. btw, Graham you need to edit
Hello Marco, LF, Excellent copy here in JN18HP, hope the capture find its way through the reflector. I was definitely not expecting such a signal with an earth electrode ! 73 Michel - F5WK Attachment
Roger, I have been monitoring the wspr segment for a while. G8IMR Andy's signal is a fairly constant 25/28 db SNR in the morning and sometimes until dawn, depending on the locally received noise. I h
Hi Wolf, Yes, I've seen similar signal on my Toshiba Satellit laptop. I can't recall the frequency though. I traced it to be generated inside the PC, and likely to be a battery charger sequence. No a
Hello Stefan LF/VLF group, Very nice copy in a quiet location in JN18IP. Distance is roughly 460 km. I have a full record, almost 1 Gb, of the input. Thank you Stefan. 73 Michel - F5WK Attachment: DK
Hello John, Thanks for monitoring. About 200 watts RF in a 10 meter high antenna. Ground loss is still very high (173 ohms including coil etc ...) 73, Michel - F5WK JN18HP Le mercredi 27 octobre 2010
Hello Stefan, great ! Sure, you will learn what a 12V-220V inverter is able to do when one forget to ground the coaxial link between preamp and an isolating transformer ! The inverter is used to char
Hello Stefan, Do you know of a FTP site where I can upload the file ? Would be nice if you could create a temporary login (for FTP) If not, don't bother with that, I'll try something else (at the exp
I just checked the distance with Ossi OE5ODL, 800 km, not too bad for a really short unefficient antenna. Ossi was barely readable with the vertical but O copy with the 2x2 meter Cu loop (2 differen
