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 December 2012, 02:16 PM   #1
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Default Aleph J for Universal Mounting Spec

This is a thread to discuss the Aleph J PCB on the Universal Mounting Scheme from the DIYaudio store.

Link to UMS - http://www.diyaudio.com/forums/image...ation-v2.1.pdf


Quote:
Originally Posted by 6l6
As for the board, I was envisioning the same basic layout as the F4, F5c, etc... The longer board with the outputs all on the lower edge.

Also, I would love to see R7 replaced with a trimmer pot, as that's where you will be able to dial out any DC offset on the outputs... Maybe put pads for a parallel resistor there as well...

J109's are basically impossible to get anymore, so most people will be using a matched pair of J74's... it would be handy if they were face to face so their cases can be zip-tied together for better thermal tracking.

Quote:
Originally Posted by GKU
May I suggest some additional design proposals:

- Lead pitch for the use of 1/4W audiophil resistors as Dale or PRP
- Space for an - input foil capacitor as f.i. 1uF ClarityCaps PWA or ESA
__________________
Illustrated Build Guides - Pass F4 - Pass B1 - Pass F5 - Pearl 2 - O2 HPA - Hagerman Bugle 2 - Pass Aleph J - Me at BA '13
  Reply With Quote
Old 4th December 2012, 01:55 AM   #2
diyAudio Member
 
Join Date: Mar 2007
Location: Bandung
Default Aleph J PCB

My first try, double layer. C1 using Electrolit Cap, Q1 2SJ74.

Didiet
Attached Images
File Type: png Aleph J Uni Mount.png (29.3 KB, 2491 views)
Attached Files
File Type: pdf Aleph J Uni Mount.pdf (42.5 KB, 240 views)
  Reply With Quote
Old 4th December 2012, 02:14 PM   #3
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Didiet - That looks very nice!

How much lead spacing is there for the 'small' resistors? It would be nice to fit a PRP or dale RN60, as those are about as big as most 'audiophile' resistors. Some people will want to use them.

Great to see the pair of J74 - could you put a pot at R7 as a variable resistor?

If possible, the 0v traces should be bigger, and another wire pad added near the input to connect signal ground, psu ground and speaker ground at one place. See the F4 or F5 pcb in the store for an example.

Thank you so very much for your efforts!
__________________
Illustrated Build Guides - Pass F4 - Pass B1 - Pass F5 - Pearl 2 - O2 HPA - Hagerman Bugle 2 - Pass Aleph J - Me at BA '13
  Reply With Quote
Old 4th December 2012, 04:03 PM   #4
diyAudio Member
 
Join Date: Feb 2009
why not make it a long board. all outputs on a line. thats what folks want. so they kan make use of the 400mm wide sinks.
  Reply With Quote
Old 4th December 2012, 05:29 PM   #5
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
I agree! But the 400mm sinks would be more than enough for an Aleph J. The 300mm would be fine.
__________________
Illustrated Build Guides - Pass F4 - Pass B1 - Pass F5 - Pearl 2 - O2 HPA - Hagerman Bugle 2 - Pass Aleph J - Me at BA '13

Last edited by 6L6; 4th December 2012 at 05:45 PM.
  Reply With Quote
Old 4th December 2012, 05:52 PM   #6
diyAudio Member
 
Join Date: Feb 2009
yes. 400mm was just a option its the same for 300mm. let's say board lenght of 240mm
and spacing between the to center fets of 120mm (center to center) and 40mm between center and outher fets (center to center) thats 200mm center to center between the outher fets.
  Reply With Quote
Old 4th December 2012, 08:43 PM   #7
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
So what you are saying is that you would like to see the basic form factor of the cviller F5x boards?

I agree that it's a great idea, as it is the 'standard' form factor for the DIY audio boards. And if someone has a F5c or F4, etc... they could just plug the Aleph J pcb in with minimum trouble.


Click the image to open in full size.
__________________
Illustrated Build Guides - Pass F4 - Pass B1 - Pass F5 - Pearl 2 - O2 HPA - Hagerman Bugle 2 - Pass Aleph J - Me at BA '13
  Reply With Quote
Old 4th December 2012, 09:58 PM   #8
diyAudio Member
 
Join Date: Feb 2009
i don't remember how the F5X boards look like. but the F5c/F4 style. only with bigger space between the 2 center outputs.
or make it posible to use some standar ouput boards with it. i have the peter daniels board's. but if i want to use them, i need to use output boards from my aleph30 boards. just to get the heat spread over my sinks.

Last edited by AudioSan; 4th December 2012 at 10:02 PM.
  Reply With Quote
Old 4th December 2012, 10:07 PM   #9
diyAudio Member
 
Join Date: Feb 2009
or just make it as the chipamps boards. with breakable output boards.
that will suit everyone.
  Reply With Quote
Old 5th December 2012, 12:15 AM   #10
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Quote:
Originally Posted by AudioSan View Post
i don't remember how the F5X boards look like. but the F5c/F4 style.
I meant F5c -- sorry.
__________________
Illustrated Build Guides - Pass F4 - Pass B1 - Pass F5 - Pearl 2 - O2 HPA - Hagerman Bugle 2 - Pass Aleph J - Me at BA '13
  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
Universal Mounting Specification rsdio Construction Tips 3 31st October 2011 11:51 AM
what is the mounting depth and mounting diameter of this? lemans23 Multi-Way 2 26th October 2005 10:52 PM
Has anybody built an Aleph-x to this spec??? D3 Pass Labs 58 16th June 2004 06:08 PM
Spec on transformer for Aleph 5? Tony D. Pass Labs 8 24th April 2002 12:49 PM


New To Site? Need Help?

All times are GMT. The time now is 04:14 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