Oppps! I made a link error for the Dawn Chorus recording Please try this: http://dl.dropbox.com/u/15916951/VLF/May29/Dawn_chorus_May29_2011.mp3 73 Scott VE7TIL PS - TU VE7SL for pointing this out...
0215utc Whistlers evolving into Chorus. Very complex sounds now being generated. Started hearing faint whistlers on VLF as of about 0130UTC. Lots of spherics this afternoon with very strong strokes w
Hi Wolf One issue noted that may be worth exploring. For fast waterfall display speeds like listening to VLF natural noise, the waterfall speed seems forced to one rate only for any setting I give it
Thanks Wolf! I'll start testing this right away! 73 es tu Scott I have just uploaded yet another 'beta' of spectrum lab (V2.76 b24) to this site: http://dl4yhf.ssl7.com/speclab/install_speclab_beta.z
Hi All Does anyone know how to select multiple frequency ranges for the autonotch filter in SL? Specifically, I'd like to setup the autonotch filter to avoid the various Alpha QRGs if this is possibl
Hi Roger The closest electrode to the ocean is feeding into a creek that itself feeds into the ocean. This electrode is <75m from the salt water. The other electrode is about 0.5km inland at my house
Hi All I've started posting wideband grabs of the entire VLF band on the VE7TIL grabber page. I find the natural signals the most fascinating and have setup the grabber to plot from DC - 42KHz... The
Hi All The VE7TIL 2200m grabber will remain off for another week or so. This is do to a hardware failure in a wide band amplifier in the the DDS system. I'm waiting for some replacement parts as my e
Hi Halldor & group Interesting! I can see the stationary blip on the WWLLN plot over Iceland, I guess that's your volcano. I have the VLF loop aimed north and will be leaving it that way for awhile.
Hi Roger With probes with 60' base and my 1m square portable loop resonated on 8970 about 10km. 73 Scott I'm wondering how far up/down the coast a signal can be detected with a similar electrode prob
Hi All Repairs to the grabber have been made and the system is back in full operation. Sorry for the outage as what started as a limited experiment on VLF turned into a rapid departure from reality!
Hi All Started hearing faint whistlers on VLF as of about 0130UTC. Lots of spherics this afternoon with very strong strokes which may be the cause...? As I end this email they are coming faster and f
Nicely done Roger and Henry! 73 Scott VE7TIL On 5/1/2011 10:05 AM, Roger Lapthorn wrote: "Because of the extremely low antenna efficiencies, 136kHz is not a band for low power transmitters" - a quote
Victor / Eddie You've got my vote for the name change :-) Thanks for sharing the technical details of your monitoring stations. I hope to slide my RX system down there soon... 73 Scott VE7TIL
Hi Markus Little from VOR this morning, however, I was treated to about an hour of sporadic dawn chorus on VLF. On a more ominous note, I have detected an illegal grow op with the LF grabber. Those
Hi Victor / Eddie What are you guys using as your antenna for this? Thanks, Scott Your findings agree with mine, the Schumann fundamental resonance is high and does not agree with published data. My
Hi All VLF is alive with Dawn Chorus activity this morning here in VE7. You can listen live on my VLF stream. See my site for link. The CME launched from the sun on June 21 is expected to arrive at 0
Hi All I noted the M class flare at 0209UTC July 30, on my VLF grabber. See here: http://dl.dropbox.com/u/15916951/VLF/M%20Flare.JPG 73 Scott VE7TIL CN89dk http://www3.telus.net/sthed/argo/
Hi Stefan What you are seeing is natural. See this paper: http://www.vlf.it/naturalnoisefloor/naturalnoisefloor.htm 73 Scott VE7TIL Scott, i just took a look on your VLF grabber and saw the sferics a
Hi All He's a VERY interesting paper on something we can all relate to. "Mitigation of 5060 Hz power line interference,in geophysical data" http://vlf.stanford.edu/sites/default/files/publications/20