Hello Uwe, My VLF RX startup was delayed but now running in SpecLab; will be monitoring 8970.022 continuously for at least the next week. 73, Jim AA5BW From: [email protected] [mailt
Uwe, Thank you for the great signals! Hoping to capture them in Virginia or Arizona sometime soon. Would 500W into a 300m antenna imply approximately 10mW < ERP < 50mW after coil losses, at 9kHz? Doe
Uwe and Markus, Was he out from about 02:15 to 03:15? I’m trying to interpret using Markus’ grabber. Hope springs eternal here that with management of natural noise, continuous monitoring
Thank you Markus, They are a stealthy lot so the extra eyes on are much appreciated (hope only Uwe reads this at his end). I don’t see any signs of perambulation 17 – 21 UT so I will add
Bob and Stefan, Any thought of using Fluorinert to prevent coil breakdown? In indoor applications, if we didn’t want a high-voltage (including 100kV and higher) coil (or transformer or connecto
Bob, Thanks for the feedback, sounds like you have corona well-managed on the coil. For future reference, in case someone in the group has an outdoor HV application in a particularly humid environmen
Stefan, If arc-induced breakdown paths between turns is an issue, have you considered adding a homebrew corona inception detector with feedback to the modulator or switch driver? I haven’t made
Stefan, Thank you for the information. I was hoping for input from you and Uwe on ERP and antenna angle, and your information is very helpful. Regarding antenna angle: I am hoping to detect T/A VLF s
Thank You Stefan, I’ve opened a window centered on 11904.76190; this will be very helpful, much appreciated. Thank you also for the confirmation of QRM. 73, Jim AA5BW From: owner-rsgb_lf_group
Is the signal in the attached most likely QRM? The amplitude has varied by only +/-5dB over a 24 hour period*, which makes me think that the signal is local (QRM). The two frequencies exhibited by th
Stefan, Is the TX antenna horizontal? (Like a standard dipole or end-fed?). I wanted to confirm, because a short horizontal antenna in the VLF is an interesting case (in theory, near-field strength s
Markus, Paul, Stefan and Uwe, Outstanding collaboration and individual work! This is quite exciting. Directionally optimized 55uHz VLF Opera rings in the new year on a very memorable note. Markus, wa
Alan, My short answer is: I don't know, but I hope that the LWPC resources that Paul has (a) made available and (b) applied, will allow valuable learning in this area. The work of Watt, Wait et al in
Alan, I took a quick look for some examples of VLF terminator bumps (not prevalent in a random sample) and the first one I found was NPM - Farnborough (from Hampton - 1964); note some qualitative and
Peter and Uwe, Congratulations, Jim AA5BW From: [email protected] [mailto:[email protected]] On Behalf Of Markus Vester Sent: Thursday, January 16, 2014 3:08 PM To:
Mal, "What is the difference between an antenna wire strung between two high rise flats and two radio masts at 100 feet...?" My best guess, in priority order ("+" in favor of two 100 foot masts; "-"
