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

Pass Labs This forum is dedicated to Pass Labs discussion.

Official M2 schematic
Official M2 schematic
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 25th October 2015, 05:07 AM   #1
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Official M2 schematic
Default Official M2 schematic

For all the Greedy Boyz,

The M2 officially discontinued, here is the official schematic, assuming that
it has not otherwise been posted.

In particular note the interesting bias circuit that you can use elsewhere.

Attached Images
File Type: gif M2 SCH.gif (210.3 KB, 15853 views)
  Reply With Quote
Old 25th October 2015, 05:53 AM   #2
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
You are extremely generous. Thank you Nelson.
I will stick it on the wall so I can study it.
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 25th October 2015, 07:25 AM   #3
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
The value of R6 and R7 seems too large.
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 25th October 2015, 08:28 AM   #4
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
Lm385 is a 3 pin device.
Unless one of the legs is shorted then I'm completely lost. Hahaha
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 25th October 2015, 08:33 AM   #5
grimberg is offline grimberg  United States
diyAudio Member
 
grimberg's Avatar
 
Join Date: Oct 2002
Location: California, USA
Default Check the Dumbmeter...

The Dumbmeter you used to assess yourself must be overdue for calibration.

  Reply With Quote
Old 25th October 2015, 08:49 AM   #6
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
Yeah, I think I'm out by 2 orders of magnitude. It should 0.02 Picodumbs
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 25th October 2015, 08:54 AM   #7
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
Now that I think about it a larger number would make more sense. Less dumb means more smart.
I think I was reading the intelligence meter not the dumb meter. It must be 0.02 PicoSmarts (not very smart).
I'll have a brainwave later and redeem myself for this lack of intelligence.
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 25th October 2015, 09:35 AM   #8
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
Ok. If you short out the adjusting pin thing with the negative thing you get a 1.24V reference.
Need to think about that.
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 25th October 2015, 09:46 AM   #9
stoN_Cold is offline stoN_Cold  Serbia
diyAudio Member
 
stoN_Cold's Avatar
 
Join Date: Mar 2004
Location: Belgrade RS
Quote:
Originally Posted by Nelson Pass View Post
For all the Greedy Boyz,
Voltage PSU?
  Reply With Quote
Old 25th October 2015, 10:30 AM   #10
kacernator is offline kacernator  Czech Republic
diyAudio Member
 
Join Date: Jan 2008
Quote:
Originally Posted by zeonrider View Post
Voltage PSU?
Still the same +- 25V.
  Reply With Quote

Reply


Official M2 schematicHide 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
First Watt M2 Kovax Pass Labs 154 13th February 2014 06:20 PM
JBL m2 ! Ahmad_tbp Multi-Way 0 7th February 2013 02:14 PM
First Watt M2 chrismercurio Pass Labs 16 18th March 2012 02:53 PM
swans m2 blue934 Multi-Way 0 22nd May 2008 06:56 AM
Audio Note M2 regulator schematic drobert Tubes / Valves 1 10th November 2007 04:09 AM


New To Site? Need Help?

All times are GMT. The time now is 06:25 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki