Hi guys,
A long time reader on this forum, just registered now.
I am in need of a portable microphone preamp powered by batteries only, for location dialogue recording, ambience, wildlife, outdoor recording for sound design etc.
I'm on a budget, so anything like a recorder from Sound Devices or similar is way out of my league. Out in the open a laptop with a USB-powered audio interface is way too awkward to handle. Instead, I have a Zoom H2n recorder which features a 2 channels external microphone input. I'm planning on using the Zoom as an AD-converter/recorder.
What I need is a low cost microphone preamp with a phantom power option as well. Everything should be powered by batteries only, so low power consumption is essential. I think the Green Pre would be suitable for this but for simplicity and lower cost, I'm going for the Project 66 preamp by Rod Elliott. I don't know the sound quality of this preamp but I think it is worth a try. Besides, as far as I can tell, all components is pretty standard and easily accessible.
1) Off the top of my head, a bipolar power supply from batteries could be done like in the attached schematic. Is this the right way?
2) Am I over-complicating the phantom part?
3) The "Project 66"-preamp runs on +/- 15V. I assume there will be no problem running this on +/- 9V (maybe compromising sound quality or maximum gain), but would it be fine with +/- 18V?
Hope you can help me out.
Thanks!
A long time reader on this forum, just registered now.
I am in need of a portable microphone preamp powered by batteries only, for location dialogue recording, ambience, wildlife, outdoor recording for sound design etc.
I'm on a budget, so anything like a recorder from Sound Devices or similar is way out of my league. Out in the open a laptop with a USB-powered audio interface is way too awkward to handle. Instead, I have a Zoom H2n recorder which features a 2 channels external microphone input. I'm planning on using the Zoom as an AD-converter/recorder.
What I need is a low cost microphone preamp with a phantom power option as well. Everything should be powered by batteries only, so low power consumption is essential. I think the Green Pre would be suitable for this but for simplicity and lower cost, I'm going for the Project 66 preamp by Rod Elliott. I don't know the sound quality of this preamp but I think it is worth a try. Besides, as far as I can tell, all components is pretty standard and easily accessible.
1) Off the top of my head, a bipolar power supply from batteries could be done like in the attached schematic. Is this the right way?
2) Am I over-complicating the phantom part?
3) The "Project 66"-preamp runs on +/- 15V. I assume there will be no problem running this on +/- 9V (maybe compromising sound quality or maximum gain), but would it be fine with +/- 18V?
Hope you can help me out.
Thanks!