Decoded here in Todmorden, easily with Eb/N0 = +9.2 dB That means, 10 second symbols would have been fine, but I never seem to succeed in decoding your 10 second messages, such as This I could not de
No problem, decoded with Eb/N0 = +6.7, a bit weaker thanks to the nighttime noise but would still do 10 second symbols. These are false decodes, just random noise which happens to have a correct CRC.
The message decoded anyway, enough was received before you switched off. Eb/N0 = -2.5 dB from BER 42.6 % The carrier strength corresponds to Eb/N0 = +6.4 dB The BER and Eb/N0 are somewhat bogus becau
I tracked this down to a problem in my receive timing system, the one that mixes the signal and PPS into a BT878. With that fixed, I can no longer reproduce the anomaly here. EbSynth checks out ok -
All decoded with no problem. So far we have 16:00 Eb/N0 = +10.4 dB -24.2 deg abs phase 19:30 Eb/N0 = +8.8 dB -7.2 deg abs phase 23:00 Eb/N0 = +11.0 dB -1.8 deg abs phase 02:30 Eb/N0 = +10.8 dB -10.2
Hoping to do some testing this evening at 477.695 kHz after a rebuild of the TX. A bigger PSU gives me around 150W DC input so that should be good for a few extra dB. Hoping to see if the anomaly bet
Some interruptions to the signal, a problem with the tx and I've had to drop down to a lower power. Next complete message starts 20:00. -- Paul Nicholson --
Thanks Markus, much appreciated. A good decode of a weak signal. Maybe tomorrow I'll try again with higher power so that anomaly will show up more clearly if still present. PA was misbehaving tonight
That was me at 477695.00000 Hz, 5Hz below VO1NA. 22:28 to 22:30 carrier 22:30 to ~ 22:40 EbNaut with same signaling rate as Joe. Distance about 450 km. ERP something below 100mW. -- Paul Nicholson --
Not me. Active on the evening of the 13th and overnight 477.695 kHz 14th 22:24:00 to 15th 16:00:00. Maybe it was Riccardo IW4DXW JN64 who also has been using 477.695 kHz with EbNaut, same signaling r
That's some good reception Roelof. I'm going to find myself a hawthorne tree. No EbNaut from here for a couple of days, waiting for parts to arrive. My junk box has let me down and I have to go shopp
Interesting indeed, thanks. The idea of an inductor to restrict the shoot-through current is new to me and looks great. And the recovery winding over the tuning coil to restrict the load current by t
Very nice, a good result at about 70% of capacity for that carrier S/N. The 54% bit error rate is false, indicating part of the signal was missing, I guess there was some padding. This misleads the e
I'm thinking of playing a bit more with the tx on MF, after a rebuild of the PA. Now has a bit more power. Maybe enough to reach Italy? Wondering what frequency is best to use, I don't want to clobbe
ok on now. Freq: 477690.00000 Hz Chars: 15 Symbols: 0.5 seconds Code: 8K19A Duration: 496 seconds, 00:08:16 Repeat: XX:00 XX:20 XX40 Not sure how well it will hold up. The ant Z is a bit different to
Ah I had to switch off, the output transformer is getting too hot, the wire is too thin. I'll do a quick rewind with some thicker wire and come back on later. Looks promising though. -- Paul Nicholso
