Dear All I'm at it again!!- I've tweaked my crude beacon and it now sends a signal of about 2 to3 HZ per second at the same times of 09.00 to09.30 and 21.00...
8041
Komsomolsk Na Amur
rsdn20
Feb 8, 2008 12:24 pm
Hello group "Erdsprechgerät" seems to be the correct "name" of this device. Using our friend google you can even find some images. T. Costas Krallis SV1XV...
8042
vlf4me
Feb 8, 2008 2:42 pm
That is not exactly true. Barkhausen used a ground array to snoop on telephone conversations at the front during WW1. These were essentially amplifiers...
8043
jimpat999
Feb 8, 2008 4:34 pm
You are right of course. I don't know where I got telefunken, thought it was from high school German class, but it is telefon with an ~ over the "o" if I...
8044
Douglas Kahn
douglaskahn1
Feb 8, 2008 4:59 pm
Many thanks. Erdsprechgerät, literally, earth-speak-device, appears to be correct. Doug ... [Non-text portions of this message have been removed]...
8045
Edgar
edgarbhmfa
Feb 8, 2008 5:36 pm
... to be ... Using our ... now. ... Hi Guys, I ran a Google and found the Eardspechgetate to be succeptable to being monitored by a Lauschgeräte , listening...
8046
vlf4me
Feb 8, 2008 8:59 pm
I still believe the best whistler receiving antenna is a large delta loop with matching transformer feeding an instrumentation amplifier followed by 60Hz notch...
8047
Douglas Kahn
douglaskahn1
Feb 8, 2008 10:34 pm
Absolutely, there are many more preferred means to listen to whistlers than devices used in WWI intended to do others things. The interesting thing about...
8048
Alan Melia
g3nyk
Feb 9, 2008 12:06 am
Someone on this thread mentioned that ground rods would set up chemical reactions and become less efficient...... MMMmmmm could it even be that that the...
8049
Ian Baines
ve3dji
Feb 9, 2008 3:27 pm
Adding to the general discussion about using ground rods for whistlers. I have a radio quiet location on an island about 8 km from shore. There are ...
8050
paddy l
spasaire
Feb 10, 2008 6:14 pm
Hi there, i am very new to this aspect of radio, what frequencies should i be listening at for the signal? Cheers paidí ... ...
8051
David Hine
evad_hine
Feb 10, 2008 6:40 pm
Hi Paddy The beacon is very crude - it is an experiment that will probably fail. It transmits twice a day at about 1 hz per second at 09.00 to 09.30 and again...
8052
Johan H. Bodin
junkodyn
Feb 10, 2008 8:27 pm
David, what do you mean by "1 hz per second"? /Johan...
8053
David Hine
evad_hine
Feb 11, 2008 12:10 am
dear Marty No it's not intended as a joke although it might turn out to be one!! See if you can detect it? It is an experiment- you may and most probably are...
8054
malucoelbejuco
Feb 11, 2008 3:38 am
Hi All, I've been playing with the SDR-IQ from RFSPACE all weekend. It is the most incredible VLF receiver that I have ever played with. The frequency...
8055
marty.ross
Feb 11, 2008 3:45 pm
That would be 1Hz divided by 60 which would be .0167 Hz. A half wave dipole at this frequency would be 5.3 million miles long. Is this a serious pursuit? ...
8056
ny2h
Feb 11, 2008 7:25 pm
Paidí You're only chance of 'receiving' this is if you are within a few meters of David's antenna, in which case you could ask him in person! In fact you...
8057
Rich Oliver
flagstaff_rich
Feb 11, 2008 10:25 pm
... Cheers, Rich [Non-text portions of this message have been removed]...
8058
marty.ross
Feb 11, 2008 11:02 pm
What does ERD stand for?? Thanks. ... came ... lines in Canada ... electrical ... noise" tag ... made by ... have the ... the Annual ... source would be ... ...
8059
Douglas Kahn
douglaskahn1
Feb 11, 2008 11:27 pm
Rich: I¹m assuming the erd refers to the earth in German and the previous discussion about Barkhausen. The descriptions of ³the sound of a distant rocket²...
8060
Herb Balfour
herbve3ohh
Feb 12, 2008 1:22 am
Dear David, In all respect to your efforts, I'd very seriously consider starting more in the order of 9kHz. Even this will be awfully tough, but, I beleive...
8061
David Hine
evad_hine
Feb 12, 2008 1:35 am
Dear Herb thanks for your email- you talk good sense, but I love to play!!!!!!! Best wishes Dave G4DIG ... Yahoo! Answers - Get better answers from someone...
8062
Herb Balfour
herbve3ohh
Feb 12, 2008 1:49 am
Thank you, Dave! One last point re the very low frequencies you are investigating, and, I don't profess to understand it!: The caving / mining ULF...
8063
Walter
karula4711
Feb 12, 2008 1:01 pm
Hi Dave, did you ever try to receive your own beacon or do you concentrate on transmitters? Walter...
8064
Herb Balfour
herbve3ohh
Feb 12, 2008 2:31 pm
Excellent question! I never cease attempting to catch my own amateur and experimental beacons. Many findings: weather, temperature, solar influences,...
8065
Michael
kb7nla@...
Feb 12, 2008 2:50 pm
i think he is talking about 1 to 2 cycles per second plus harmonics. I don't know how one would detect such a frequency, but who knows maybe it's possible I...
8066
Bill Beaty
bjbeaty
Feb 12, 2008 2:51 pm
I have a newbie question. A vertical CG lightning strike should emit a vertically-polarized EM pulse, and the part of the broadband pulse with spectrum well...
8067
f6agr
Feb 12, 2008 3:48 pm
Hi all Is there any listener here on the list having any personal experience in observing ELF/VLF radio noise potentially radiated by meteors entering the...
8068
Rich Oliver
flagstaff_rich
Feb 12, 2008 4:04 pm
Rich: I¹m assuming the erd refers to the earth in German and the previous discussion about Barkhausen. The descriptions of ³the sound of a distant rocket²...
8069
Rich Oliver
flagstaff_rich
Feb 12, 2008 4:49 pm
Bill, Nothing crazy here - these are excellent questions. I have wondered the same things. One big problem is that The initial pulse of local lightning is far...
