Hello, The stream in Aix use a 4m long cable I made. It use a electret microphone as well but of lower quality. It use the same resistor/capacitance polarisation as the one taht plug directly into the box, but instead of using the 1.5v from the box input i use a 9v battery. The electronics is located about alfway from the box, otherwise I get all the static from the power line above the microphone. All shielded wire of course. The result is satisfying, a little low but OK. The battery, who wasn't new, is running since about a year now, with no problem. The microphone take virtualy no current, so it can last for years. Add solarcell to that, and you'r up for decades.
I have in mind to build a mic preamp, using 5v from the USB port, with line out level, close to the microphone. It sould work with extra long wire, like 30m i hope.
Best,
Grégoire Lauvin 06 21 19 26 57 www.gregorth.net
From: petesinc@nujus.net To: locustream@locusonus.org Date: Tue, 11 Oct 2011 09:22:28 +0200 Subject: Re: [locustream] oakland stream
hmm. okay, I'll try something like this. I just need to get rid of the pulsing static in the signal and think of a way to extend the mic out of the streambox. Is that even possible?
Before you do anything else, try grounding the box efficiently by taking a wire from one of the screw fasteners on the outside of the box (the screen connector for instance) to ground - a central heating pipe or whatever is close by or literally drive a stake into the ground
However it sounds like its coming from the mike — maybe the capacitor is faulty this would also explain why you're getting such low levals.
If you have a pc (not a mac) with a mike input you could try testing the mike on that see if still clicks on that.
The circuit diagram and values for componenets are here:
http://locusonus.org/w/index.php?page=Locustream+LocusMic
best Peter
Thanks, best -a.
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Peter Sinclair petesinc@nujus.net http://petersinclair.org http://nujus.net http://locusonus.org
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