Aleph J Schematic - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 3rd November 2007, 02:18 AM   #11
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Default pic for lazy boyz

Quote:
Originally posted by Blues
Choky, did you think I missed it...?

Mr. Pass,

Aside from the jfet diff input with bjt ccs, looking at the output ccs...is R27 really between C and B of the voltage reference npn transistor (Q4)? Thanks for posting the circuit.

hehehe

R27.........

that really doesn't matter

C2 is pretty good decouple even across R26
Attached Images
File Type: jpg aleph_j_sch.jpg (55.2 KB, 10137 views)
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 3rd November 2007, 02:19 AM   #12
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by mpmarino
Death of B.

Thanks Mr. P!

yup

smashing B.

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 3rd November 2007, 02:34 AM   #13
diyAudio Member
 
ticktock's Avatar
 
Join Date: Dec 2006
Location: Old Anglia
very kind again, Nelson! Thanx !!!!
__________________
thank you papa !!
Blaue Leuchtdioden machen blöd. (hb)
quod licet iovi, non licet bovi
  Reply With Quote
Old 3rd November 2007, 04:05 AM   #14
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
Thank-you, Nelson.
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 3rd November 2007, 05:48 AM   #15
flg is offline flg  United States
diyAudio Member
 
flg's Avatar
 
Join Date: Jul 2005
Location: North East
Thanks NP
  Reply With Quote
Old 3rd November 2007, 08:25 AM   #16
diyAudio Member
 
Join Date: Sep 2004
Location: bandung
Thank you Mr.Pass !!
  Reply With Quote
Old 3rd November 2007, 08:38 AM   #17
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Quote:
Originally posted by mpmarino
Death of B
Zen,
that's it, pack your bags and move to Oz.

(Greedbags even more sleepy, I downloaded several times to different PC's in my network)
__________________
2015 : World Cup Cat Hacky Sack
  Reply With Quote
Old 3rd November 2007, 10:00 AM   #18
h_a is offline h_a  Europe
diyAudio Member
 
h_a's Avatar
 
Join Date: Sep 2006
Location: Graz, Austria
Thank you very much!

Cool a new toy for the weekend! Somebody already heating up Protel?

All the best, Mr. Impatient
  Reply With Quote
Old 3rd November 2007, 10:57 AM   #19
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
It seems that there aren't any major changes to the original Aleph circuit other than 2SJ109s with 1k drain resistors, and the Aleph current sensing resistors placed outside the global feedback loop.

Or I am still not fully awake ......


Patrick
  Reply With Quote
Old 3rd November 2007, 11:15 AM   #20
CfM is offline CfM  Germany
diyAudio Member
 
Join Date: Sep 2007
First to say: Thanks a lot, Nelson!

After a quick look 2 questions raised:

Which type of 2SJ109 is the right one. With a current of 4 - 4.5 mA running through each of the FETs, the GR type seems to be inappropriate. BL and V should work in principle, but I lack the experience to decide which one would be the better choice.

Maybe not so important, but the current through LED1 seems to be very low.

Greetings,
Chris
  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
aleph 30 schematic kendt Pass Labs 17 24th March 2012 01:38 AM
Aleph 60 schematic? roger-k Pass Labs 2 29th January 2006 12:49 AM
Aleph 5 schematic Q Kovax Pass Labs 2 1st July 2003 08:49 PM


New To Site? Need Help?

All times are GMT. The time now is 06:42 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