Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

9 volt powered pocket mic preamp circuit example grovel
9 volt powered pocket mic preamp circuit example grovel
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 5th March 2004, 11:05 PM   #1
darren01 is offline darren01  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Michigan
Default 9 volt powered pocket mic preamp circuit example grovel

I just completed a Rainbow Kit (www.rainbowkits.com) project for their EBAP-2 Audio Stereo Preamp and it does not work as well as I thought it would.

When I turn the volume knob past the mid point the amplification ends and when in the first 1/4 turn down it disorts.

Why does this inverting circuit not work? Anyone familliar with it?

What I am basically looking for is a simple opamp design that will operate to its full potential on 7-9 volts with a 9 volt battery.

It will also have to power an unballanced ECM cartridge ranging from 2 to 9 volts.

I found these below sites but I am comfused at many points.

http://colomar.com/Shavano/intro_opamp.html
http://www.rason.org/Projects/opamps/opamps.htm
http://home.new.rr.com/trumpetb/audio/micamp.html

What is good/bad about thses designs?

I see one does not have capacitors leading to the ground at the noninverting point. Is that bad?

This preamp looks like a good one but a while back I was warned against putting the pont in the gain feedback loop.
http://home.new.rr.com/trumpetb/audio/micamp.html

Would there be a better way to make the type of opamp I want to make? Basically something small like soundprofessionls.com offers.

I have rail road tracks across the street from me and want to record the engines. The SPL will probably peak at about 90db or so.

I need the preamp to be able to handle these SPLs without overloading or disorting.

Any help will be great. I really want to build this type of stuff so I can begin record this spring/summer.
  Reply With Quote

Reply


9 volt powered pocket mic preamp circuit example grovelHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Simple PCM2707 bus powered I2S source, is this circuit good or bad? JogeirEmil Digital Source 6 2nd December 2008 04:12 PM
Battery powered clock circuit. beppe61 Digital Source 26 18th March 2006 07:37 PM
12 volt preamp beamnet Tubes / Valves 11 5th January 2006 10:25 AM
battery powered pot circuit fscarpa58 Solid State 10 1st March 2004 05:08 PM
12 volt tube preamp help blackreplica Tubes / Valves 5 23rd December 2003 10:56 PM


New To Site? Need Help?

All times are GMT. The time now is 04:51 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki