Suggestions for a battery powered NON-balanced Mic Preamp? - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 29th October 2002, 09:43 PM   #1
diyAudio Member
 
Join Date: Feb 2001
Location: Madison, WI
Default Suggestions for a battery powered NON-balanced Mic Preamp?

Hey all, I hope you can help me...

I'm taking a 6-month backpacking tour of Europe next year. I have been making my own binaural recordings using a Marantz MD recorder and a pair of home made earplug mics using Panasonic WM-61 capsules.

While the quality I'm getting from this setup is terriffic, there is no way I'm lugging that recorder around with me! Besides, it chows batteries like mad.

So I bought a Creative Nomad Jukebox 3. I'll be putting a 60GB hard drive in it to replace he 20GB it comes with. This will hold most of my music collection, plus be able to record. It's the only high-tech device I want to have with me...

Anyways, this things does a pretty nice job of recording. It should serve me well in making good binaural field recordings all over Europe! Here's what I need from a mic preamp.

1. Unbalanced - It's only going three feet up to my ears. I'm already doing this with the Marantz with no detectable noise.

2. Portable - Perhaps two 9V batteries for a +/-9v split supply?

3. Provide at least 2V power to the panasonic capsules. This is easy, as I'm already doing this for the Marantz with a simple passive battery box.

4. Compact - I like the Altoids tin idea. I made a headphone amp with two 9V batteries in one.

What do you think? Would a premium op-amp be good enough or should I go discrete? I can do the op-amp design no problem, but my skills are not honed enough to do a discrete design myself.

There are lots of good schematics out there for mic preamps, but they are usually balanced.

Thanks for any help...
  Reply With Quote
Old 29th October 2002, 11:54 PM   #2
haldor is offline haldor  United States
diyAudio Member
 
Join Date: Aug 2001
Location: Columbus, Ohio
Here are a bunch of mic preamp circuits.

http://links.epanorama.net/links/audiocircuits.html

Also checkout Rod Elliot's web site he has 3 projects involving mic preamps.

http://sound.westhost.com/projects-8a.htm

Phil.
  Reply With Quote
Old 11th November 2002, 01:43 PM   #3
diyAudio Member
 
Join Date: Sep 2001
Location: Finland, Ostrobothnia
I am going for this one with one of my mics http://sound.westhost.com/project13.htm , an Audio Technica AT822 for live recordings with my Minidisc. I asked Rod himself and he said the amp will happily run off a pair of 9V batteries in series (18V) drawing only a few mA. And very low noise for the money. I don't see any other design that could beat this in that way.
  Reply With Quote
Old 23rd December 2002, 03:15 PM   #4
diyAudio Member
 
Gabrielshorn's Avatar
 
Join Date: Jun 2002
Could you put up a quick post on how you made your AT, binaural, "earphone" mics? I have seen them for sale and thought of aquiring them for my DAT. Of course if I could make them..... :-)

Thanks!
  Reply With Quote
Old 23rd December 2002, 05:22 PM   #5
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default there are some neat low voltage, low noise

single supply amps on virtually all the websites ( www.analog.com , www.nsc.com , www.ti.com , www.linear.com ) . I wonder what's in an I-POD ?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Powered Microphone Preamp - Unusual Application mrevie Solid State 1 21st July 2009 01:37 AM
Floating supply in battery powered discreet preamp aletheian Solid State 3 28th March 2007 04:42 PM
Suggestions for a stepup chip for battery powered headphone amp (from OPA134) anyone? Morse Headphone Systems 8 24th December 2004 03:50 PM
battery powered, balanced log attenuator pcb! Brian Guralnick Pass Labs 29 26th January 2004 11:30 PM
battery powered RIAA preamp question Mad_K Analogue Source 8 27th October 2002 10:10 AM


New To Site? Need Help?

All times are GMT. The time now is 10:43 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2