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

Solid State Talk all about solid state amplification.

Any High Power Darlington PA Amp Please?
Any High Power Darlington PA Amp Please?
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 10th September 2012, 08:59 PM   #11
Jay is offline Jay  Indonesia
Join Date: Feb 2003
Location: Jakarta
Originally Posted by Lazy Cat View Post
Considering Vce 120Vmax for your Darlingtons, bridged amp is the only way to get some serious power output at max. +/-60 V rails potential.
Yes, bridged amp. I will remember that.

Originally Posted by Lazy Cat View Post
Paralleling of Darlingtons can be performed if the drive current is evenly divided among all three parallel outputs and if they have app. the same hFE.
Just because the darlingtons were taken out of expensive device, I wish they have matched characteristics.

Originally Posted by Lazy Cat View Post
But if you're determined to use Darlingtons than you'll find the proper solution too, I'm sure.
Just trying to make use what I have on hands.

I just tried simulating the Darlington in dual LTP topology. It seems with low rail the distortion cannot be made low.

Tried again with Linn topology, got 0.004% THD at 500W/2R. But it is highly biased AB class (Easily oscillate in class B).
Attached Images
File Type: png Darlington_Linn.PNG (51.3 KB, 103 views)
  Reply With Quote
Old 11th September 2012, 07:22 AM   #12
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
Lin is not Linn
regards Andrew T.
  Reply With Quote
Old 11th September 2012, 12:28 PM   #13
east electronics is offline east electronics  Greece
diyAudio Member
east electronics's Avatar
Join Date: Jan 2006
Location: Athens GREECE
with 0.22 ballast resistors you have very few chances ....0.22 will not be enough to ballast between the darlingtons

when it comes to darlingtons hfe will be almost the last to bother with ...Do not forget that a darlington include the driver in the package so beta is the issue there that obviously will vary with catastrophic results depending on the supply / pcb/ drive/ load/and thermals

eventhough 11015-16 if as said the quality is good is a quite rugged device the supply is kinda low for such an application and bridged mode will also suffer from a number of issues

thermal tracking is also a bad solution ( to my understanding ) since will solve hardly one of the problem

I could see a solution with may be a multislope or dedicated VI limiters but then again will not be cost worthy from any aspect .

Finally common practice says that is never done before ...that should be a starting point ..

Kind regards
  Reply With Quote


Any High Power Darlington PA Amp Please?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Darlington TIP142 & 147 power amplifier. Matthewong Solid State 21 26th September 2015 08:49 PM
High power PA amplifier. halvardf Solid State 3 4th February 2004 04:43 PM
High Power High Quality Digital Amp aspycaudio Digital Source 0 6th December 2003 09:49 AM
Internal speaker cable for high power disco/pa cabs Bull Multi-Way 18 22nd June 2003 05:29 AM

New To Site? Need Help?

All times are GMT. The time now is 11:58 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio