Active current source or power resistor? - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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 18th September 2002, 08:26 PM   #1
diyAudio Member
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Default Active current source or power resistor?

I just built a small SOZ and while I am more than pleased with it
I would like to replace the source resistors with an active current
source so I don't need a ballenced input. Would a fet as a active current source be noiser than a 50 watt Dale chassis mount resistor in this aplication.


  Reply With Quote
Old 18th September 2002, 09:28 PM   #2
The one and only
Nelson Pass's Avatar
Join Date: Mar 2001
Making me trundle all the way over here from the Pass
forum, where this belongs, huh?

The current source biasing the Mosfets from the negative
rail is a superior technique, and was omitted from the
original article only due to its added complexity.

If you place a nice filter cap across whatever voltage
source is biasing the current source Mosfet (if you choose
to use a Mosfet ) then it will be plenty quiet.

  Reply With Quote
Old 19th September 2002, 03:33 AM   #3
diyAudio Member
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Thanks for the advice. I have changed to a mosfet current source
and like the results. The Radio Shack 8 ohm resistors that I had
as source resistors may have been adding a little noise!


  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
Alternative Active Current Source for Aleph-X ?? EUVL Pass Labs 17 8th February 2012 03:31 AM
Sunfire Signature power amp current source outputs rhapsodee Solid State 0 3rd December 2008 03:15 PM
Active current source Nixie Solid State 7 4th December 2006 09:31 PM
power source resistance vs. current needs Dominique Power Supplies 7 11th November 2005 12:42 AM
Active Current Source for TDA1543 stefanobilliani Digital Source 17 12th November 2003 02:18 PM

New To Site? Need Help?

All times are GMT. The time now is 03:23 PM.

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