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From: "Lee Hudson" <hudsonville@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Fri, 15 Jan 2010 22:14:08 -0000
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Subject: RE: LF: Cat Whiskers
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Hi John,

Markers were every 15 seconds.
Also the whole thing was repeated every 5kHz going up in frequency.

If if you look carefully the tips of the whiskers are connected.

My thought after reading Laurence's comment on variable freq drive for=
 a
motor that it maybe the hydraulic compactors from the refuse site clos=
e by,
but I'm sure they're not that sophisticated.

But my favoured guess for something more common, is a washing machine=
 on
spin cycle.
Don't all start washing please, HI!!

73,
Lee.
=20

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of John P-G
Sent: 15 January 2010 21:38
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Cat Whiskers


On Fri, 15 Jan 2010 13:15:57 -0800 (PST)
M0FMT <m0fmt@yahoo.co.uk> wrote:

> Too glib
> =A0
> I can visualise the whisker pointing in the direction of time but no=
t=20
> the mirror image how does that work.

Look like a carrier modulated by a harmonically rich waveform, which=
 reduces
in frequency......=20


then after a time the carrier is modulated by a harmonically rich wave=
form
that now increases in frequency......

Not too difficult to imagine?

What's the time scale on the spectrogram?

A motor that slows down, stops and then speeds up?


J

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