Simple DIY Amp - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 25th January 2013, 05:55 PM   #11
routhun is offline routhun  United States
diyAudio Member
 
Join Date: Mar 2005
Location: Sunnyvale
Hi JMFahey,

Sorry my mistake, its HAL OPB not HALOpB. Anyway here is the link to it.

HAL OPB amplifier

Thanks,
__________________
routhun
  Reply With Quote
Old 25th January 2013, 11:52 PM   #12
CraigP is offline CraigP  United States
diyAudio Member
 
Join Date: Apr 2012
Location: Pittsburgh, PA
Quote:
Originally Posted by Fast Eddie D View Post
Yeah Craig, that's a terrible circuit for audio. It might be appropriate for a DC servo buffer.

Try an LM1875 chip. It's simple and you can build a circuit with a bare minimum of components. You can experiment with tweaking it too without getting too deep. You can use single or dual supply. A google search will yield hundreds of circuits. You might be surprised with the results.
Thanks for the info. Can anyone assist with understanding the data sheets for some of these amps? Based on the data sheet from my sound card what input sensitivity should the amp have? I see values like 300mv @ 150k ohm, 100mv @ 20k ohm and 75mv @ 20k ohm.

Any tips would be great! Lots of circuits to choose from. I just want to pick the correct one.

Thanks all!
  Reply With Quote
Old 26th January 2013, 12:24 AM   #13
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Just build the cicuit suggested in the chip amp datasheet (or buy a kit) and use a volume control in its input, so you set it where you like it best.
Any value from 2x10K to 2x100K will do.
Audio or Logarithmic taper (curve) is best but if unavailable, a Linear curve will do.
Anyway you will adjust it once to some useful level and then control volume from your Soundcard.
  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
Simple DIY Stereo Tube Amp with around 20W GentryBa Tubes / Valves 6 4th June 2012 06:46 PM
Simple & nice DIY proposal (FX120) martinsson Full Range 13 11th July 2011 10:12 AM
Simple & Low Distortion DIY PreAmp circuitscc Solid State 10 2nd May 2011 01:45 AM
Simple AMP DIY 98nassin Car Audio 6 23rd October 2007 10:10 PM
looking for simple discrete 100W DIY amp halusha Solid State 27 8th December 2006 10:30 PM


New To Site? Need Help?

All times are GMT. The time now is 10:57 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