[MilCom] Plip Pop

[RICHARD L. KRAMER]

Have you guys listened to the signal on 243.8 USB? Steve, does what you
heard sound like this signal? I receive this signal from 243.79 - 243.845
USB mode - sounds like water dripping. I don't know if this "dripper" is
associated with the SDS satcom system located just below here around
243.7075 - 243.7325 MHz. Just a thought.
Rich - Reading, PA
----- Original Message -----
From: "Steve Douglass" <webbfeat at 1s.net>
To: <milcom at mailman.qth.net>
Sent: Tuesday, April 13, 2004 10:35 PM
Subject: Re: [MilCom] Plip Pop


> Thanks to all those who replied. I heard the Plip Plop again just
> after 6:00 PM Local. Again it was very strong with some fading as if
> it was coming from an aircraft with slightly directional antennas and
> it turned away.
>
> On closer listening the signal has a flute-like musical warbling tone
> in in between the Plip Plops.  Signal lasted for twelve minute and
> then abruptly stopped.
>
> I did notice at the the time there was an AWACS in the local pattern
> at the time but don't know if it had anything to do with the Plip
> Plops.
>
> _Steve
>
>
>
>
>
>
>
> >Hi Steve,
> >
> >I saw the message re having heard a water drip sound on HF.  I have the
same
> >history of HF captures and no positive ID.  I have heard tell it may be a
> >modem of some sort...crypto probably.  You might try listening to the
> >various "digital signals" sound samples available online.  Try searching
> >keywords "digital sound samples", etc.  I believe the WUN mail list has
some
> >great support for digital captures.
> >
> >If nothing else, you may find it handy to download the sound samples and
use
> >them as "instant" reference.  I'd give you some url's but I just rebuilt
my
> >PC's and have not redone the cross references I use to link to the pages.
> >
> >good luck
> >
> >John Collins
> >____________________________________
> >----- Original Message -----
> >From: "Steve Douglass" <webbfeat at 1s.net>
> >To: <milcom at mailman.qth.net>
> >Sent: Tuesday, April 13, 2004 8:37 AM
> >Subject: [MilCom] Plip Pop
> >
> >
> >>  Intercepting a weird signal on 250.000 MHz that I can only describe
> >>  as sounding like water drops ( in rapid succession) plopping into a
> >>  pool of water. very strong signal with occasional fading.  Plip pop
> >>  plip plip plip plop sound.
> >>
> >>  Anyone ever hear anything like this before?
> >>
> >>  -Steve Douglass
> >>  --
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>
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