Hi VLF, Since 22:45 i'm running 200 mA on 8270.0050 Hz into my antenna again. 200 mA is the limitation of this compact yoghurt-coil. The overall system loss is about 1 kOhm, so i just need 40W to run
VLF, BTW the calculated ERP is 150 uW. Quite low :-( But i will be able to run it permanently... The transmission is now stopped and was running from 20:45...22:30 UTC. 73, Stefan Am 14.04.2016 23:01
Hi Stefan, I looked for your carrier in the 478 uHz grabber window, but nothing significant due to the high QRN background. I hope to be able to catch a daytime transmission as soon as the weather im
This time, a good signal at about 0.35 fT http://abelian.org/vlf/tmp/160414a.gif but the noise was high from the same direction so cannot be avoided by steering the loops away. I don't know if this i
Hi Markus, Yes, you're right. I had the wrong value in my mind, downscaled 0.82 Ohm radiation resistance to VLF but that was for a 100m (kite) vertical. So the signal is another 6 dB weaker, maybe 35
Hi Paul, Thanks for the peak :-) When talking about ERP, how strong is Markus' and Uwes signal? Just to get an impression. I don't know their ERPs. It was raining in the morning. I had to bring the c
DJ8WX from the 12th with the same bandwidth and time of day and other settings, just a shift of the loop to point http://abelian.org/vlf/tmp/160414b.gif Uwe is 1.7 dB stronger and the noise was lower
I made a mistake with the signal strengths. When combining E-field and H-field to maximise the S/N I have to remember to divide the strength by two. I forget to divide by two when measuring DJ8WX and
DK7FC one hour averages in 278uHz, stepping 30 minutes. Flux density and phase lead, by start time. 2016-04-16_22:00:00 0.13 fT 141.8 deg 2016-04-16_22:30:00 0.10 fT 121.1 deg 2016-04-16_23:00:00 0.0
Hi Paul, Thanks. I had to shut down in the morning due to HV breakdown of the cable. No fire or similar problems ;-) However, i've made a few changes in the afternoon. One of them was putting the fer
