Op amps and Pass Transistors - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 29th August 2011, 02:54 AM   #1
diyAudio Member
Join Date: Sep 2004
Location: New Zealand
Default Op amps and Pass Transistors

I have been doing some interesting discovery on the sound of op amps with and with out pass transistors.

See my blog site: opamp - opamp construction

Surface mount soldering skills are needed. I use a x12 magnifying LED lamp,and vice with pivot adjustment.Either enamel wire or just 1 strand of RG58 coax the silver colored wire is used between the bias resistor and the base.

With pass transistors BC846 NPN and BC856 PNP installed on the Brown Dog dip adapter in a emitter follower configuration the left and right stereo balance improves immensely. To a level of degree making conventional op amps a complete waste of time.

Both positive and negative rails are catered for. The bias is set at 6.5ma this seems to sound the best.

Happy listening.
Cheers / Chris
  Reply With Quote


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
Burr Brown op amps,in amps,power op amps for sale magneticnorth Vendor's Bazaar 1 23rd September 2010 10:50 PM
Sine wave - Square & Triangle wave generator using Transistors / OP-Amps lineup Solid State 20 9th October 2006 12:15 AM
Pass DIY Op-Amps prh Pass Labs 2 11th February 2003 04:10 PM

New To Site? Need Help?

All times are GMT. The time now is 11:17 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2