Your efforts are greatly appreciated, Paul, along with the kind words and motivation from Stefan DK7FC Markus DF6NM Marco IK1HSS and Luis EA5DOM. The TX has been QRV since Sunday afternoon and is sti
Hi Joe, Maybe you can provide some informations for us, to get a clear impression of what you're doing: -A picture of the coil in its current location (when transmitting). - A picture of the antenna,
Not a trace of the signal overnight, here or at Forest. I think something is wrong. Do you have a local monitor to check that it's coming out on the right frequency? I'm looking now for the daytime s
Ah I've found a hint of a signal 00:00 to 06:00 which I can home in on. It's at +93 uHz which is good, but only 0.03 fT. Working on it... -- Paul Nicholson --
Paul, Thanks for very good AoA validation of Joe's signal. Not sure if Joe's antenna is pure vertical and remain intrigued by VLF AoA error with VLF TX antennas that have non-vertical E components du
That's a relief, Paul. Thank-you very much for your observations and feedback. The aerial (10m x 100m RL, 2mm Cu) continues to draw 0.3A and the 30+ cm pyrex/steatite insulators are doing their job.
I use the formula which is given in your png attachment, where Vy is the N/S complex amplitude and Vx is the E/W. And atan2 implements the arctan. It produces an azimuth modulo 180 degrees and the am
A nice signal from VO1NA overnight 9th/10th. Happy to see the signal on the right frequency 8270.007093 Hz and back to 0.06 fT flux density. -- Paul Nicholson --
Great news, Paul. The frequency is a bit enigmatic. It had always been a few ppb low since calibration in 2013 but is evidently bouncing above and below. Could part of this fluctuation be from propag
Joe mentioned: "Could part of this fluctuation be from propagation?" Joe and Paul, For your consideration and (with your permission) my edification have we seen natural-propagation-related frequency
Hi Joe, Am 09.05.2017 20:41, schrieb [email protected]: The big helix is rather nice, 128 mH at 59 ohm DC, 24 strands of 0.08mm copper. Better to use the normal 0.4 mm wire i would suggest. I'll try lock
LWPC claims 7.2 dB anisotropy on the VO1NA to Todmorden overnight path. That means east-to-west is only 7.2dB more loss than west-to-east. For VO1NA to DK7FC the anisotropy is only 5.6 dB. Also VO1NA
Paul, Thats so exciting I created a folder in anticipation of data next winter. For those events I can provide spectrograms from 2 fT/rt-Hz receivers near Atlanta GA and Gainsville, FL; they run cont
Thank-you all for the advice and inspiration. The discussion has been very interesting -- it was well worth the effort to make the VLF photons but that was the easy part compared with Paul's work. Im
The signal overnight 11th/12th reached about 0.085 fT, the best signal strength so far. Was that due to the increased ERP or propagation. The noise was high that night too. Overnight 12th/13th I cann
Hi Paul, Thanks for the report. The signal overnight 11th/12th reached about 0.085 fT, the best signal strength so far. Was that due to the increased ERP or propagation. The noise was high that night
I don't expect you'll get any directionality at all at VLF It will closely approximate a vertical Hertzian dipole, whatever you use. Re-tuning is a problem, because it will leave the signal at a new
Sorry for messing up the phase! I just found another dB by raising the wire and retuning it again at about 2120 utc with 0.3 amps. Hopefully all is set for EbNaut tonight. The following was used: cat