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Re: (meteorobs) amateur infrasound receiver?
Hi all,
I have done some tests with an ultrasonic system manufactured to detect
leaks in enclosures. I placed this system at the focus of my 1.8m antenna
and use it to listen to the sky. The results were so surprising that I
decided to do another test during the next meteor rain. I have to return the
instrument, and I am looking around for a schematic of a ultrasonic receiver
with audio output. Any idea ???
Best regards
John
ON4EU
Belgium
----- Original Message -----
From: "David Saum" <DSaum@infiltec.com>
To: <meteorobs@atmob.org>
Sent: Monday, March 24, 2003 5:01 PM
Subject: Re: (meteorobs) amateur infrasound receiver?
>
> Richard,
>
> I am not sure that VLF radio receivers can
> pick up meteors, but I find them interesting.
>
> I recently bought one of McGreevey's WR-3
> pocket-portable VLF radios. It is pretty slick but if
> you are anywhere near power lines then all it picks
> up is 60 Hz hum. When I get away from
> the lines, I can hear numerous pops,
> clicks and chirps. For more WR-3 info:
> http://auroralchorus.com/wr3.htm
> I wonder if it could be modified to
> reject more 60 Hz?
>
> BTW: I just got a note that Inspire VLF3
> radio kits are now available.
> http://image.gsfc.nasadot gov/poetry/inspire/
> Here is the order form I got today (3/24/03)
> http://www.infiltec.com/SID-GRB@home/VLF3order.pdf
> I have already sent my order in.
>
> Of course infrasound is audio and not radio.
> Here are some links I have collected on it.
> http://www.infiltec.com/SID-GRB@home/#infrasound
>
> I would like to see a ~$100 kit to build an
> infrasound receiver something like
> http://wwwdot belljardot net/microbar.htm
> Here is a professional system with some
> interesting ideas
> http://www.knmidot nl/~evers/infrasound/web-article/how.html
>
> Ciao,
>
> Dave
> http://www.infiltec.com/SID-GRB@home/
> http://www.infiltec.com/seismo/
>
> ----- Original Message -----
> From: "Richard" <wordsmith1776@cox-internet.com>
> To: <meteorobs@atmob.org>
> Sent: Monday, March 24, 2003 7:44 AM
> Subject: RE: (meteorobs) amateur infrasound receiver?
>
>
> > Some more links re: VLF "infrasound" receivers:
> >
> > Stephen McGreevey's portable WR-3 VLF receiver, at
> >
> > http://www.auroralchorus.com/wr3.htm
> >
> > Listening Guide for listening to VLF "Natural" radio sounds, at
> >
> > http://www.auroralchorus.com/wr3gde.htm
> >
> > Some sound files, of McGreevey's (and others) recordings of VLF signals,
> > during quiet and active geo-magnetic conditions:
> >
> > http://www-pw.physics.uiowadot edu/mcgreevy/#latest
> >
> > NASA "ISPIRE" online streaming VLF radio, with sample soundfiles:
> >
> >
> > http://spaceweather.com/glossary/inspire.html
> >
> > (note: there is a Disclaimer; the INSPIRE VLF online streaming audio may
> > not always be available, but the archived sound files, and
> > time/frequency
> > plots of "natural radio" sounds are; very educational.
> >
> > Richard in Lafayette, Louisiana
> >
> >
> > The archive and Web site for our list is at http://www.meteorobs.org
> > To stop getting all email from the 'meteorobs' lists, use our Webform:
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>
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>
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