(meteorobs) Wanted: Weatherproof Microphone

[drobnock2]

I'm certain you tried the ebay search. Have you looked at:
www.torontosurplus.com/tes/tes24.htm
Or a similar surplus outlet. From what I could see even at surplus 
prices $CD the brand test mic you are seeking is not inexpensive.
George John Drobnock


--- In meteorobs at yahoogroups.com, Ed Majden <epmajden at s...> wrote:
> I'm looking for a surplus or used Weatherproof Microphone Unit, type 
4184
> sold by Bruel Kiaer or similar type. Low freq. response to 4 Hz. 
These are
> sometimes placed around airports for noise abatement studies. I 
would like
> one for an amateur astronomy project, the recording of sonic booms 
generated
> by meteor fireballs along with an all-sky video of the fireball. It 
must be
> inexpensive as I don't have funding to support this experiment.  New 
ones
> are rather expensive unfortunately!  Can anyone help?
> 
> 
> Ed Majden
> West Coast Sandia Bolide Detection Station
> Courtenay B.C. CANADA
> 
> http://members.shaw.ca/epmajden/index.htm
> 
> STOP LIGHT POLLUTION IN THE COMOX VALLEY - INSTALL SHARP CUT-OFF 
LIGHTING
> AND REPLACE THE OLD COBRA HEAD LIGHT POLLUTING FIXTURES.  SEE THE 
STARS
> AGAIN AS THEY WERE MEANT TO BE SEEN!
>  -- 
> 
> 
> ---
> Mailing list meteorobs
> meteorobs at m...
> http://lists.meteorobs.org/mailman/listinfo/meteorobs