Aleph 4 parts - 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 October 2003, 07:23 PM   #1
diyAudio Member
 
Join Date: Sep 2003
Location: New Jersey
Question Aleph 4 parts

I am trying to compile the Aleph 4 parts list from a published Aleph 2 parts list and the Aleph 4 service manual. I am not able to make sure the number of the following parts! I appreciate anyone who have made an Aleph 4 can help me find it out. I am sure this will also benefits many other DIYer. My question are:

1. in the schematic (service manual shown left channel), the IRF244 and 2 resistors do not have R? and Q? on it. Can anyone help me to identify it?

2. On the schematic shown (left CH), the R29 is 619, but also said the value is 523 on right CH. Anyone knows why? (it is not mentioned why in the manual)

Thanks.

Thomas
  Reply With Quote
Old 12th October 2003, 04:45 AM   #2
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
The Aleph 4 is the most poorly documented amplifier because
it is really an Aleph 2. Look there, and you'll see that the
schematic was cut and pasted.

As to the difference between R and L, maybe I was sitting
closer to one speaker at the time.

In any case, there is almost no difference in performance.
  Reply With Quote
Old 12th October 2003, 09:47 PM   #3
Saibot is offline Saibot  Sweden
diyAudio Member
 
Join Date: Oct 2003
Location: Sweden
Mr. Pass,

knowing that you recommends the Aleph 2 over other alephs. Which Aleph model comes second ?

I am planning on building one but I can't figure out which one to build... The Aleph 2 is not wife accepted i think, sorry...
Well, maybe a small fan/water cooled one in a single chassis

Since you mention Aleph 4 is almost the same as an Aleph 2 would this be the one to recommend next ?

Btw, how would you describe the difference, soundwise, between an A2 and A4. I've never listened to an Aleph. Only a DIY Zen.

/Tobias
  Reply With Quote
Old 17th October 2003, 01:52 AM   #4
diyAudio Member
 
Join Date: Sep 2001
Location: Salt Lake City
Saibot,
I am having a problem with my 2's not due to a wife problem but because I recently moved into a smaller home...but in a nicer area.....The 2's are now in the room next to where I listen to music which necessitated much longer cables to and from through a common heat vent. Of course this room is small, where my computer is located, and heats up quickly!!

I am planning on building a smaller monoblock version of the 2's that will be water cooled. I am going to make my sinks from solid alumnium...or copper if I can afford it at the time, by drilling through the blocks lengthwise on a verticle mill using a long aircraft bit for the water flow paths. Then tapping the ends of the water flow paths for simple U connectors to couple them together. If I do this in copper they can be silver soldered U's instead, plus the copper would be more efficient at conducting heat. I may also make 2 sinks for each amp and mount the devices directly to the heatsink and then insulate the sinks from the chassis....huge thermal advantage here. The cooling fluid circulator will be located in the basement of my home so it is out of the way and the pump and cooling fan are not audible.

Mark
  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
Mini Aleph Board & Aleph 2 Parts List gpsmithii Pass Labs 3 16th January 2010 03:58 AM
WTB: Aleph parts monarodan Swap Meet 0 25th October 2006 11:04 AM
FS Aleph Parts bacworth Swap Meet 10 8th July 2005 10:31 PM
Aleph 2 parts JayV Pass Labs 14 22nd October 2003 08:55 PM
Aleph 5 -- Parts billy Pass Labs 2 9th January 2003 11:28 AM


New To Site? Need Help?

All times are GMT. The time now is 02:02 AM.


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