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Re: LF: Way off subject ... and totally batty

To: [email protected]
Subject: Re: LF: Way off subject ... and totally batty
From: "M. J. Powell" <[email protected]>
Date: Fri, 2 May 2003 14:04:09 +0100
Disposition-notification-to: "M. J. Powell" <[email protected]>
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In message <[email protected]>, Hugh M0WYE <[email protected]> writes
Hi group,
Has anyone else tried this with their LF/VLF receivers ?

I have put a microphone on my SLM and have been receiving bats. I used a
tiny electret condenser mic capsule on the input of the D2006, with the
usual 1.5V cell and blocking cap to power the capsule. I was able to pick up
bat sounds up to 55kHz. There were some clicks down at 22.5kHz, and some
twitters around 45kHz. I think they are just the common or garden
Pipistrelle bats.

The bats are attracted to our big halogen security lamp, because of the
insects that fly round it.

I haven't fed the signals into Argo yet ...
Apparently they use an increased PRF as they home in to their prey.

Mike
--
M.J.Powell




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