VLF, A carrier is now running from JN49IK at 300 mA antenna current. Estimated ERP is 35 uW. The safety function is set very carefully to 10 mA. I intend to run it until 7 UTC, as a first test. Signa
...sorry that was unprecise: QRG: 5170.005 Hz. The carrier is on the air since 0:30 UTC. Time for some sleep now!! Am 20.10.2017 02:36, schrieb DK7FC: VLF, A carrier is now running from JN49IK at 300
...there have been some thunderstorms again last night in a range of < 2000 km. Arround 3 UTC the cancellation effects were quite expressed. Within 200 Hz or so, the SNR can change by 10 dB. It looks
Sorry, that was false: New: f = 5170.1000 Hz Start time: 20.October.2017 16:00:00 UTC (daily) Symbol period: 180 s Characters: 1 CRC bits: 6 Coding 8K19A Duration: 12h Antenna current: 300 mA Tomorr
...the carrier was unintentionally run on 5170.1 Hz since 4 UTC. It was changed to 5170.005 Hz at 8:26 UTC. The transmission at night was very stable. Next, the same transmission at night and the car
...carrier stopped 14:49 UTC. Need to check the site before continuing. Unfortunately no transmission tonite... 73, Stefan Am 21.10.2017 10:37, schrieb DK7FC: ...the carrier was unintentionally run o
...a visual inspection of the TX site showed no sign of arcing or other unwanted effects. The actual resonance frequency is at 5140 Hz, so it will be pulled further down when rain starts to fall. Thi
...the message was running on the 20th, 22th and 23th. Today i made a mistake in the SpecLab settings which unfortunetely affectet the transmission. I watched the alternating colours (due to the PSK)
Good nighttime results at DL0AO on this frequency, using only 8.9 hours of data from the 31.4 uHz western cardioid instance. Decoder output was equal from the two available nights, so surely correct.
Hi Markus, Thanks for the results. So the night/day SNR ratio looks much better than on 6.47 kHz for us. Am 18.10.2017 11:12, schrieb DK7FC: Am 17.10.2017 22:55, schrieb Markus Vester: As a crude fir
Hi Stefan, attached is the result of stacking three days at DL0AO (also appended to table below). Indeed the daytime carrier was well received, with no indication of attenuation towards the afternoon
Hi Markus, Thanks for your observations and explanations. What we need between DK7FC and DL0AO is a challenge, i mean a real one, something on the limit! What do you think about 970 Hz 10 kV on my an
Paul, What abbut your new E field RX, is is ready and calibrated now? Currently there are no transmissions lanned for the next days so we could fill that gap by doing the 100 character message here o
I was expecting to bring it back in for another rebuild this week, but, it is working quite well right now, and some parts I need wont be here until 10th November. So, I will leave it running until
I've been going over the figures, referring carrier and EbNaut signals to 1Hz BW for comparison. Night is on average slightly better than day: Combined H + (new) E: day = -27.3 dB, night = -26.7 dB
Oh I forgot, the Windows version doesn't have 16K23A yet. I must finish the testing... Eb/N0 and phase for the four recent 1 char messages: Night H-field (new) E-field Combined 20/21 7.1 dB -165.7 de
Not really. Attenuation is higher per unit distance, so the background from long distance sferics will be much lower. Attenuation of relatively close signals is not so much, so at this sort of range,
...it was a bit confusing last evening. 20 minutes before the start i thought that it may take 10 days or longer when using night transmissions. Your information below came to late, i did not check t
