Hi All, Recently I've been monitoring sudden ionospheric disturbances at VLF, using a H-field receiver built for the purpose. ...
4774
w1eof
Mar 3, 2005 9:34 am
Very interesting Paul. I have a couple of questions: 1. What is "EHT overwinding rescued from an old TV set" ??? 2. What was T1's function in the TV set? 3....
4775
pan@...
Mar 3, 2005 11:54 am
... That's the 'extra high tension' winding on the line output transformer. Some older TVs have that as a separate winding which can be slid off the core....
4776
Rochte, Robert
rochte
Mar 3, 2005 9:02 pm
I thought that I should clarify my earlier post in response to some recent off-list communication... Excerpts below are from an email that I recently sent to...
4777
Danny Riordan
requiem_rock
Mar 3, 2005 11:14 pm
Hi, I was wondering if anyone could give me a few tips how to protect my VLF reciever from lightning strikes? Dan...
4778
INSPIRE Team I-1
vlfkorgan1
Mar 3, 2005 11:35 pm
Hi all, I captured several good audio samples of data being transmitted via power lines today in Colorado. At first the signals sounded similar to the old...
4779
Michael Hebert
qrpbear
Mar 4, 2005 12:31 am
Shawn, Utility companies use their lines for data transmissions but these are usually very short and low in frequency. There is another possibility. You may be...
4780
karula4711
Mar 4, 2005 7:18 am
... Thats what happens when they use spread spectrum technology Walter...
4781
Christopher Gross
brunnis07649
Mar 4, 2005 3:43 pm
... power lines today in Colorado. At first the signals sounded similar to the old Ground Wave Emergency Network (GWEN) system. ... I just made an audio file...
4782
INSPIRE Team I-1
vlfkorgan1
Mar 4, 2005 6:48 pm
Hi all, I had a chance to record Thursday morning and captured some amazing S3-S4 whistlers and other activity! I have uploaded a 220 kB file (March...
4783
Christopher Gross
brunnis07649
Mar 4, 2005 7:22 pm
I just posted an mp3 file of that signal (an isolated burst; they often come in overlapping clusters) at http://users.erols.com/cgross/VLF/linedata.mp3 If I...
4785
INSPIRE Team I-1
vlfkorgan1
Mar 4, 2005 7:47 pm
Hi all, I heard the data on the power lines while monitoring my VLF receiver while driving to my quiet whistler location. The data is generally bursts lasting...
4786
Christopher Gross
brunnis07649
Mar 4, 2005 8:31 pm
... space at times of six or seven seconds between the bursts. The bursts are centered at about 12.5 kHz (rather high pitch). The bursts come and go with no...
4787
palantiri@...
biolratty
Mar 4, 2005 8:36 pm
A sense of humour... outrageous, should`nt be allowed! ... From: Rochte, Robert To: VLF_Group (E-mail) Sent: Thursday, March 03, 2005 8:53 PM Subject:...
4788
Christopher Gross
brunnis07649
Mar 4, 2005 8:46 pm
(That was quick!) Here's the Web site I mentioned that features recordings of interference: http://ve3hls.tripod.com/noise/rfihome.html Hmmm, some of these...
4789
INSPIRE Team I-1
vlfkorgan1
Mar 4, 2005 9:01 pm
Just for the record that is the same chattering sound I hear in Colorado Chris. It is not very frequent at my location although I do hear it on occasions...
4790
Christopher Gross
brunnis07649
Mar 4, 2005 9:41 pm
... protect my VLF ... Hi Dan, What type of receiver do you have? Chris...
4791
JimNLori
na_pigzi
Mar 4, 2005 10:12 pm
Hi Shawn, I sure wish you could put in a live feed to the web :-) jd...
4792
INSPIRE Team I-1
vlfkorgan1
Mar 4, 2005 11:10 pm
Hi JD, I take it you liked the whistlers... Maybe someday everything will be in place to put up a live stream from Colorado. Currently, DSL is not even...
4793
pan@...
Mar 6, 2005 12:16 pm
Some activity in the UK today. Whistlers only S1 but multiple (6-10) echoes. S1 Risers. S1 hiss 2.5kHz to 4.5 kHz. Lots going on, just very weak - but seems to...
4794
mdennisond@...
marky26_uk
Mar 6, 2005 1:10 pm
Hi Paul & all, Nice to hear from you again. Time is 13:05 here in Sheffield & i'm getting no activity, if you're still listening at this time are you still...
4795
pan@...
Mar 6, 2005 7:27 pm
Hi Mark, Yes, after a long period of downtime, my E-field reciever is running again. The activity increased a little to about 1230 UT, then faded by 1300. But...
4796
spogfrawne
Mar 6, 2005 10:44 pm
Saturday march 5th,Kananaskis (foothills) near Calgary, Alberta, Canada. Afternoon hiss and whistlers at approx. 3:00 UT. The Kp index was only at 2 when this...
4797
Mark
marky26_uk
Mar 6, 2005 11:09 pm
Hi all, Activity has started here in UK, Sheffield at 23:00 GMT. Whistlers at S1-S2 are occuring. Still getting magnetic disturbance also. Mark....
4798
henksp
Mar 6, 2005 11:14 pm
Hi all, As a newbie in this field (see meassage 4665) I have perhaps a stupid question. I finished building my first VLF receiver. It is still in the testing...
4799
pan@...
Mar 6, 2005 11:16 pm
... Yes, getting those here, S1-S2. These are quite a bit stronger than those earlier in the day. Several have a few echoes. -- Paul Nicholson, Manchester,...
4800
Percy Jones
percy.jones2@...
Mar 6, 2005 11:39 pm
Hi Paul & All, I just read Paul's very interesting site on SID monitoring. I have had a dedicated rx running on 24 KHz for a couple of years monitoring NAA on...
4801
Christopher Gross
brunnis07649
Mar 7, 2005 12:26 am
... described ... Hello Henk, I was getting a lot of hum on my handheld receivers until I tried replacing the whip antennas with a short length of wire (about...
4802
mdennisond@...
marky26_uk
Mar 7, 2005 1:00 am
HI Henk, If using pc then use an audio transformer (or similar) between the receiver & pc, this greatly reduced my hum. Also to listen to hum free at home use...
4803
INSPIRE Team I-1
vlfkorgan1
Mar 7, 2005 3:33 am
I can confirm the whistlers with echoes. Saturday night I began to hear S3 whistlers with up to ten echoes in the house. There were also occasional S3...
