Schematic To Classee DR3-VHC - 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 28th November 2006, 07:38 PM   #11
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Well exercise testic are considered good food by some


hehe... you're funny Head spaz.

regards

Carlos
Attached Images
File Type: gif untitled.gifa.gif (69.5 KB, 407 views)
__________________
Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
  Reply With Quote
Old 29th November 2006, 04:29 AM   #12
diyAudio Member
 
Greg Erskine's Avatar
 
Join Date: Jan 2002
Location: Sydney/Australia
Is that pepper or salt?
__________________
Greg Erskine
  Reply With Quote
Old 14th December 2006, 06:04 AM   #13
rehad is offline rehad  Turkey
diyAudio Member
 
Join Date: Mar 2006
Location: Istanbul
Default Classe Audio Seventy Output Schematic

Hi,

I have explored the Classe Audio Seventy and I have found the darlington transistor 2n6426 was malfunctioning. I couldn't find the 2n6426 in the local electronic shops so i have replaced it with the similar transistor BC517. It is now working well . I have adjusted the bias resistor for an idle current of 150 mA . I am not sure about this setup but i think it's not bad.

Has anyone have an idea about the idle current of Classe Seventy ?

Below is the output stage schematic of Classe Audio Seventy that i did explored with a multimeter.

Thanks
Reha
Attached Images
File Type: jpg classe.jpg (51.9 KB, 432 views)
  Reply With Quote
Old 14th December 2006, 11:05 AM   #14
diyAudio Member
 
Zero Cool's Avatar
 
Join Date: Sep 2004
Location: MN
I have no idea if this helps or not, but my DR-15 schematic list's the BIAS at 74ma per device!


Zc
  Reply With Quote
Old 14th December 2006, 11:27 AM   #15
rehad is offline rehad  Turkey
diyAudio Member
 
Join Date: Mar 2006
Location: Istanbul
Actually i did the 150 mA bias setup by measuring the current on the +47 Volt power rail . I have tested the amp 4 hours continuous . The output heatsink was near 40 degree . The MJE340 and MJE350 was about 70 degree . May be the 150 mA a little bit high
  Reply With Quote
Old 1st March 2008, 08:03 AM   #16
posxia is offline posxia  China
diyAudio Member
 
Join Date: Oct 2006
Can someone kindly tell me why most CLASSE AMP,such as DR3 \ Dr9 adj the bias current by NPN Darlington transistor ? not use general npn bjt such as MJE340 , MPS8099 usually?
thx!
  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
DBX 500 schematic d3imlay Solid State 0 2nd August 2008 05:12 PM
F3 schematic kenev Pass Labs 2 24th January 2008 03:24 PM
Help with this schematic? imix500 Parts 4 11th August 2004 10:08 AM


New To Site? Need Help?

All times are GMT. The time now is 05:39 PM.


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