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RE: [VLF_Group] Whistler activity, Croatia, Zagreb, 2013-01-31/30

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  • thierry alves
    Hello, I made a video of my VLF station in Portugal, but it s in french. My receiver + UHF wide band FM transmitter is on the roof of Saint Amaro church :)
    Message 1 of 32 , Feb 1, 2013
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      Hello,
      I made a video of my VLF station in Portugal, but it's in french. My receiver + UHF wide band FM transmitter is on the roof of Saint Amaro church :)

      http://www.youtube.com/watch?v=5qZ3Kl48uKE

      Regards from Thierry.




      ________________________________
      > To: VLF_Group@yahoogroups.com
      > From: skulenov@...
      > Date: Fri, 1 Feb 2013 00:54:33 +0100
      > Subject: Re: [VLF_Group] Whistler activity, Croatia, Zagreb, 2013-01-31/30
      >
      >
      >
      > Well great then, you have experience and that's good!
      > Try to use SpectrumLab with it's options of hum removal, I really doubt I
      > would hear anything without it at my location!
      >
      > It's really late here now (UTC+2) and I'm working tomorrow so I'm going
      > off...
      >
      > Regards,
      > Sead
      >
      > On Thu, Jan 31, 2013 at 11:41 PM, Frank
      > skybug@...<mailto:skybug%40verizon.net>> wrote:
      >
      > > **
      > >
      > >
      > > Hi Sead, ok, I just got done reading this and trying to locate your folder
      > > in the groups. I listen to vlf stuff now and have a SID setup running, but
      > > never really had luck hearing whistlers. I have a unit that I bought and
      > > built, but need to get up into the woods to get away from all the AC wiring
      > > around here. I have seen all these post that people have listed saying they
      > > heard them and I study lightning here as well. I have heard them before
      > > with some small kits I bought/built, but never on the PC.
      > > I have 3 loops in operation listening and see all the VLF signals out
      > > there below 48khz, so I know I can get them, but last time I hooked up my
      > > long wire, all I got was a ton of static and buzz...
      > > On yahoo know searchnig the ulfelf forum, but cannot get acess to the
      > > files area..
      > >
      > > Thanks
      > >
      > > Frank
      > >
      > > ----- Original Message -----
      > > From: Sead Kulenović
      > > To: VLF_Group@yahoogroups.com<mailto:VLF_Group%40yahoogroups.com>
      > > Sent: Thursday, January 31, 2013 5:35 PM
      > > Subject: Re: [VLF_Group] Whistler activity, Croatia, Zagreb, 2013-01-31/30
      > >
      > > Just forgot to mention, you don't need a 3m antenna, you can use a shorter
      > > one, something like a meter long metal 'L' profile or metal pipe would do
      > > you just fine, even with much smaller input impedance (in the range of
      > > 10M-100M Ohm), just make sure you keep it as far away from higher objects
      > > as possible, to avoid signal attenuation from capacitive coupling and
      > > formation of capacitive divider between your antenna and surrounding
      > > objects. It can even be at a ground level as long as it is in a clear area.
      > > If having any question, just feel free to ask! This is great hobby and I'm
      > > glad to help!
      > >
      > > Regards,
      > > Sead
      > >
      > > On Thu, Jan 31, 2013 at 11:26 PM, Sead Kulenović
      > skulenov@...<mailto:skulenov%40gmail.com>>
      > > wrote:
      > >
      > > > Hi Frank,
      > > >
      > > > well, first you need an antenna, stiff and rigid to resist wind but
      > > > flexible enough not to brake, i have two but use only one ( 3m long, tin
      > > > tube fixed to a 0.5m long PVC pipe that is in turn fixed to a tree) at a
      > > > height of about 2-2.5m above ground standing vertically (from the top of
      > > a
      > > > tree, not touching any leaves or branches!). Next, I brought a 3-wire
      > > cable
      > > > from a ground rod ( 2-3cm iron rod driven in the ground just below the
      > > > tree, not hitting any roots for the sake of the tree ;) up to a point
      > > where
      > > > the frontend box is and connected it to a 'ground plane' of the frontend
      > > > circuit.
      > > > The front end( it's a J310 in a common source, 1G Ohm input impedance
      > > > configuration with no source bypass cap and a minimum of gain) has no
      > > drain
      > > > resistor, instead, I connected drain to a wire going to my room and
      > > > connected a ground to another wire going to my room. There, a drain
      > > > resistor is connected to a +V supply, and a ground wire to a GND of DC
      > > > supply. The rest of the circuitry is just some simple preamps with a bit
      > > of
      > > > lowpass filtering and an audio (500:8 ohm) output transformer to protect
      > > my
      > > > soundcard input. After the soundcard come millions of transistors running
      > > > the SpectrumLab software... ;)
      > > > The frontend circuit concept is very similar to a popular phantom powered
      > > > preamps, so that you only need two wires to send power and get the signal
      > > > back! I love it so much! :)
      > > > There should be some schematics I drew some time ago in my folder among
      > > > the group files... I think it's called 'skulenov's files' or something
      > > like
      > > > that...
      > > > Take a look and have a good time!
      > > >
      > > > Best regards,
      > > > Sead
      > > >
      > > >
      > > > On Thu, Jan 31, 2013 at 10:06 PM, Frank
      > skybug@...<mailto:skybug%40verizon.net>> wrote:
      > > >
      > > >> **
      > >
      > > >>
      > > >>
      > > >> This all sounds so good and of interest to me, how is everyone receiving
      > > >> these signals?
      > > >> Frank
      > > >>
      > > >>
      > > >> ----- Original Message -----
      > > >> From: Sead Kulenovic
      > > >> To: VLF_Group@yahoogroups.com<mailto:VLF_Group%40yahoogroups.com>
      > > >> Sent: Thursday, January 31, 2013 7:20 AM
      > > >> Subject: [VLF_Group] Whistler activity, Croatia, Zagreb, 2013-01-31/30
      > > >>
      > > >> Hello all,
      > > >>
      > > >> great activity here in Zagreb last night! Couldn't stop listening, now
      > > I'm
      > > >> suffering from the lack of sleep... ;)
      > > >>
      > > >> Best regards!
      > > >>
      > > >> Sead
      > > >>
      > > >> [Non-text portions of this message have been removed]
      > > >>
      > > >> [Non-text portions of this message have been removed]
      > > >>
      > > >>
      > > >>
      > > >
      > > >
      > >
      > > [Non-text portions of this message have been removed]
      > >
      > > [Non-text portions of this message have been removed]
      > >
      > >
      > >
      >
      > [Non-text portions of this message have been removed]
      >
      >
      >
    • Sead Kulenović
      Thanks for the note! Getting them, but I m a bit late. ______ Sead ... [Non-text portions of this message have been removed]
      Message 32 of 32 , Feb 19, 2013
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        Thanks for the note!

        Getting them, but I'm a bit late.

        ______
        Sead

        On Tue, Feb 19, 2013 at 9:46 PM, Paul <paul@...> wrote:

        > **
        >
        >
        >
        > Another storm in the right place tonight.
        >
        > Lots of weak whistlers on west Europe streams,
        > should be louder further east.
        > --
        > Paul Nicholson
        > --
        >
        >


        [Non-text portions of this message have been removed]
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