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

["Bob Eldridge " <r.c.eldridge@ieee.org>]

> Hi Hugh
>
> > 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.
Bear in mind though that the average microphone is not designed to receive
much above voice/music frequencies.

Bob VE7BS