... I see the same change here at Todmorden. Bearing of 20.27kHz was 145.2 (actual ICV = 143.4) and the 'new' signal on 19.8 is bearing 144.8. 'new' signal...
21590
thierry alves
f6keo
Jun 12, 2013 8:22 am
Hello Frank, you can look here at the Paul's page : http://abelian.org/vlf/spectrum.shtml And you will verify that no signal from NAA is received in UK. They...
21591
m0wye
Jun 12, 2013 9:51 am
Thankyou Paul, Is the slight difference in bearing explained by the sidebands from GBZ or is it likely to be a different transmitter site? Hugh M0WYE...
21592
Alan Melia
g3nyk
Jun 12, 2013 10:32 am
Hi Hugh That sounds a little odd but quite possible. I wonder if they have a new TX and it is operating as ISB transmitting on the lower sub-carrier. I...
21593
gingermary1
Jun 12, 2013 12:18 pm
Good day all I know this post is a little old, but I note that the Paschal document no longer seems be available in the KC0YA folder. I've made a Dropbox...
21594
gingermary1
Jun 12, 2013 12:18 pm
Good day Thanks for the post, would have started wondering about this, lost my NAA signal recently too. Regards Cornelia...
21595
adiastelle
Jun 12, 2013 3:34 pm
Dear Costas, please is possible experiment in WSPR@ 472 KHz. Greece-Italy? Tnx. Best Regards. Richard - IK7FMO...
21596
Peter, 54N 10E
df3lp
Jun 12, 2013 4:42 pm
Hi Hugh, Confirmed from Kiel; 19.8 kHz, showing the same sunrise signature as 20.27 kHz. Increased field strength around 10:15 ut. ...
21597
Peter, 54N 10E
df3lp
Jun 12, 2013 4:46 pm
Hi Frank, Confirmed from Kiel. 24 kHz is off since 2013-06-11, ~00:10 ut. http://www.df3lp.de/cgi-bin/fh/plot_channel.cgi?date=13-06-11&freq=24.0KHz . Peter,...
21598
Percy Jones
kf2at_nyc
Jun 12, 2013 5:31 pm
NAA went off at 00:09z on Tuesday. There was a brief outage earlier in the afternoon that coincided exactly with a very strong lightning sferic. I don't know...
21599
thb201
Jun 12, 2013 6:24 pm
I monitor both NAA and NML (25.2kHz. in LaMoure, ND) regularly on a daily basis. I can assure that both go down regularly, almost on a weekly basis. One or...
21600
Peter, 54N 10E
df3lp
Jun 13, 2013 10:17 am
Hi, Back to 20.27 since 2013-06-13, ~08:30 ut. http://www.df3lp.de/cgi-bin/fh/show_wf.cgi?date=13-06-13 Peter, 54N 10E...
21601
Thomas Ashcraft
heliotown27
Jun 13, 2013 3:48 pm
Sprite June 06 2013 06/06/2013 04:55:37.225 34.0575 -101.8835 69 0 +220 http://www.heliotown.com/Sprite_June_06_2013_045537UT.html I got overwhelmed with...
21602
Paul
paul@...
Jun 14, 2013 5:56 am
... There we go, http://abelian.org/vlf/tmp/icv130613a.png Wonder what that was all about. -- Paul Nicholson --...
21603
Paul
paul@...
Jun 14, 2013 6:46 am
http://abelian.org/vlf/tmp/ta130606c1.png Signals time-shifted to correct for propagation from 34.0575N,101.8835W, so only the sferics which align vertically...
21604
Thomas Ashcraft
heliotown27
Jun 14, 2013 2:41 pm
... Hi Paul, I am sending you data off-list of lightning strokes that generated sprites from June 06, 2013. This was a storm cell that started over eastern New...
21605
dl1eds
Jun 14, 2013 5:53 pm
NRK (Iceland, 37.5 kHz) is off since 8 UT yesterday. Hopefully for maintenance only. 73 Ernst...
21606
Paul
paul@...
Jun 14, 2013 7:36 pm
Thanks for the list Thomas. ... I thought that might be the case. Means we can't use it to tell if any ELF transients are associated with non-sprite ...
21607
Thomas Ashcraft
heliotown27
Jun 14, 2013 7:54 pm
... Well, actually I have a different method than most. I also shoot DSLR in continuous image mode at 2.5 seconds per shot. Then I run through the images in...
21608
Peter, 54N 10E
df3lp
Jun 14, 2013 8:19 pm
Moin Ernst, Confirmed, but 57.4 kHz still alive. 73 de df3lp, Peter, 54N 10E...
21609
Paul
paul@...
Jun 14, 2013 8:36 pm
There were 77 sprites in the list for 2013-06-06 and data was collected at Cumiana for all but two of them, http://abelian.org/vlf/ta130606/ Signals are time...
21610
renato
reromeroit
Jun 14, 2013 9:29 pm
Hi Paul, let me know if it is appropriate continue to changing the Cumiana gain between day and night, or whether it is better keep it constant. Bye, Renato...
21611
Walter Treftz
sjotrollet
Jun 15, 2013 12:05 am
Wonder what they're using for xmtrs? Back around 1960 I was engr at the Grindavik transmitters and had a AN/FRT-4 on about 80 kc into 800 ft vertical (tower)...
21612
David L. Wilson
dlwilson314a
Jun 15, 2013 12:05 am
I have routinely heard them shut one frequency down and bring up the other for periods of time. In fact, at least generally I have not seen both up at the...
21613
Peter, 54N 10E
df3lp
Jun 15, 2013 8:19 am
Hi David, ... See: 37.5kHz http://www.df3lp.de/misc/wf/TFK_2010-2012.png 57.4kHz http://www.df3lp.de/misc/wf/NRK_2010-2012.png (Don't know which callsign is...
21614
Tom Becker
b19063
Jun 16, 2013 8:38 pm
I've moved the ground of the Cape Coral receiver. It has been a brackish submerged stainless wire for years while the antenna has been an 8' stainless whip. ...
21615
maximilianwieder
maximilianwi...
Jun 18, 2013 1:19 am
Hi! Maybe you know the BBB-4 receiver... http://www.auroralchorus.com/bbb4rx3.htm Surely the transistors can be replaced by other types like BF245 and BC549...
21616
Costas Krallis
g7ahn
Jun 18, 2013 3:16 am
... BC549 for the output is OK. For the FET, you may have to change the source bias resistor from the default value of 220 Ohm, even if you use 2N3819, as...
21617
fenton_denton
1:05 am
Hello all, First off I am new here so please go easy on me. I am an ECE major and VLF radio is a bit of a new spin on some of my background knowledge. I am...
21618
vlfkorgan1
1:08 am
It appears the following website may have the details you are looking for on the RS-4 receiver: http://library.thinkquest.org/2784/inspire/toc_inspire_kit.html...
