That looks good, thanks. Are you using that with an M10? Do you plug the ou=
tput into the mic input or line in?=0D
=0D
It's a bit odd that this sort of thing isn't widely available on eBay. I se=
e just one for $40, obviously home made. Yet there are Chinese versions of =
far more complicated devices for just a few dollars. The market mustn't be =
big enough.=0D
=0D
Peter Shute=0D
=0D
=0D
--------------------------=0D
Sent using BlackBerry=0D
=0D
________________________________=0D
From: =0D
To: =0D
Sent: Wed Mar 14 01:13:38 2012=0D
Subject: [Nature Recordists] Re: Initial SASS test shows bands of harmonics=
=0D
=0D
=0D
=0D
Hi Peter=0D
=0D
Here is a link that shows how to wire a battery box using one 9v battery fo=
r two channels.=0D
=0D
Description:=0D
http://www.megalithia.com/elect/battbox.html=0D
=0D
Schematic:=0D
http://www.megalithia.com/elect/BATTBOX.pdf=0D
=0D
You can simplify this by eliminating the extra output that has a 300hz high=
pass filter.=0D
=0D
I am measuring 4.3v across two EM172 capsules and 4.9v across one capsule u=
sing this box and a not-very-fresh 9v battery (battery unloaded is only del=
ivering 8.9 v, so a fresh battery would be even higher). Powering all four =
capsules will be slightly lower than this, but well within the 3-10 v spec =
for these capsules.=0D
=0D
I am in the process of building the same array, with only two capsules. I j=
ust need a good shielded cable and I'll be ready to catch the spring peeper=
chorus, which normally doesn't arrive until early April but may be very ea=
rly this year, as everything else is. It's been a warm winter and very earl=
y spring, distressingly so.=0D
=0D
John=0D
=0D
John L. Crockett=0D
Wesminster, Vermont=0D
=0D
--- In <naturerecordists%40yahoogrou=
ps.com>, Peter Shute <> wrote:=0D
>=0D
> Thanks for that. Does the change of resistor value change the recommended=
capacitor value?=0D
>=0D
> And is there any way to use a single 9V battery for both channels?=0D
>=0D
> Peter Shute=0D
>=0D
> > From: <naturerecordists%40yahoog=
roups.com> <naturerecordists=
%40yahoogroups.com>] On Behalf Of Brian Dasilva=0D
> > Sent: Tuesday, 13 March 2012 8:52 AM=0D
> >=0D
> > 9V battery Thru 9K ohms....=0D
>=0D
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