Capacitor in the KSA 100 ltp - 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 2nd September 2003, 08:32 AM   #1
Mambo is offline Mambo  Italy
diyAudio Member
Join Date: Feb 2002
Location: Italy
Question Capacitor in the KSA 100 ltp

I'm looking at the schema of the Krell KSA 100 amp, and i'm puzzled with the 470uF caps in the emitter legs of the input stage, after the degeneration resistors...
What is their real use ? it seems, from simulation, that it can reduce the first harmonics level.

Thank You,
  Reply With Quote
Old 4th September 2003, 07:15 AM   #2
diyAudio Member
Join Date: Oct 2001
Location: Hong Kong
Send a message via ICQ to hatasa

As I undersand, for increase the open loop gain there....

  Reply With Quote
Old 6th September 2003, 02:20 AM   #3
diyAudio Member
Join Date: May 2003
Location: Colorado
Hello -

I agree with Hatasa. Increased gain from the first stage, but also increased distortion from the first stage due to lack of degeneration.

But then the increased overall loop gain translates to increased overall loop feedback, which reduces the closed loop distortion again.

Personally I prefer to keep the distortion to a minimum at each stage. Also, if the schematic is drawn correctly, there is a small AC signal across an unbiased electrolytic capacitor. This will also increase the distortion as the cap can be slightly reverse biased. Also, many people can hear the sonic signature from the electrolytic capacitor.

As always, there are lots of tradeoffs to choose from. Each person will make different choices.

Hope this helps,
Charles Hansen
  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
Best PS capacitor RFENG Parts 3 19th January 2008 02:44 PM
what capacitor is this? abiedoodles Parts 10 12th December 2007 07:11 PM
Capacitor Help MorePower7701 Solid State 8 25th July 2007 06:41 PM
Capacitor esl dhole Pass Labs 1 23rd April 2005 02:18 PM
Capacitor or not? future Parts 2 24th June 2003 11:10 PM

New To Site? Need Help?

All times are GMT. The time now is 09:06 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