Mini Aleph Build - 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 27th February 2012, 09:47 PM   #11
diyAudio Member
 
Join Date: Feb 2009
thats more like it
  Reply With Quote
Old 27th February 2012, 11:29 PM   #12
dmsims is offline dmsims  United Kingdom
diyAudio Member
 
Join Date: Oct 2007
Bought my boards a couple of months ago:

Click the image to open in full size.
  Reply With Quote
Old 28th February 2012, 01:31 AM   #13
Eric is offline Eric  United States
diyAudio Member
 
Eric's Avatar
 
Join Date: Nov 2000
Location: Central PA, USA
Ha - that's a pretty funny story! Your speed of building an amp seems to match my own - seems that all of my projects span multiple years.

Congrats for finding the time (and parts from all those years ago) to get you build under way!
__________________
My DIY Basement Theater, Aleph-X Amplifers and Avro Open Baffle Speaker construction pages.
  Reply With Quote
Old 28th February 2012, 07:58 AM   #14
slomatt is offline slomatt  United States
diyAudio Member
 
Join Date: May 2005
Location: San Francisco, CA
Everybody has seen populated Aleph boards before, time to move onto the fun part of the project.

As with my Chipamps one of main components is an IKEA product, in this case a $5 garbage can. I needed a way to keep fingers out of the power supply, while still allowing for ventilation.
Click the image to open in full size.

Abbreviated to to exactly proper height, give or take an inch or so.
Click the image to open in full size.

Bending the edges, those are sharp and leave very nice cuts, and they are good for putting scrapes in your freshly painted parts.
Click the image to open in full size.

The cage is about 6" tall.
Click the image to open in full size.

To save space the power supply boards are stacked using aluminum tube and 4-40 allthread as spacers. Cutting the rod to the proper lengths was pretty time consuming.
Click the image to open in full size.

The bottom and top are pieces of decent plywood covered in aluminum flashing for shielding (pretty sure this is not UL approved).
Click the image to open in full size.

Here are the Signal transformers mounted to the chassis.
Click the image to open in full size.

The cage fits over the whole thing and is centered using the four aluminum posts at the corners. It is clamped down by brackets on the sides.
Click the image to open in full size.

All connections are through a thick aluminum plate from an old 12v power supply I had lying around.
Click the image to open in full size.

Click the image to open in full size.

Power will run from the power supply to the amp through a 7 wire umbilical cord that I braided together.
Click the image to open in full size.

Click the image to open in full size.

The wire is about 4' long so I have enough to locate the power supply the Pass approved minimum distance of 2' from the amp. The wire is 14g which should be fine for the relatively low currents involved.
Click the image to open in full size.

- Matt

Last edited by slomatt; 28th February 2012 at 08:02 AM.
  Reply With Quote
Old 28th February 2012, 03:49 PM   #15
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
What a fantastic thread!!!!

I have some awesome, mil-spec connectors that you would be quite welcome to, but they are only 6-pin... I suppose you could run a separate screw lug for the ground, (similar to a phono ground) which would either look very cool or very bad, depending on execution. But your found-item engineering skills are fantastic, so you would probably make it look excellent!

I remember your Chipamp from Burning Amp, I thought it was supremely well done!

PM me if you want the connector, or more info.
  Reply With Quote
Old 28th February 2012, 05:30 PM   #16
slomatt is offline slomatt  United States
diyAudio Member
 
Join Date: May 2005
Location: San Francisco, CA
Quote:
Originally Posted by 6L6 View Post
What a fantastic thread!!!!

I have some awesome, mil-spec connectors that you would be quite welcome to, but they are only 6-pin... I suppose you could run a separate screw lug for the ground, (similar to a phono ground) which would either look very cool or very bad, depending on execution. But your found-item engineering skills are fantastic, so you would probably make it look excellent!

I remember your Chipamp from Burning Amp, I thought it was supremely well done!

PM me if you want the connector, or more info.
6L6,

That is very generous of you, you've got a PM. Thanks!

- Matt
  Reply With Quote
Old 29th February 2012, 06:46 AM   #17
slomatt is offline slomatt  United States
diyAudio Member
 
Join Date: May 2005
Location: San Francisco, CA
Here's some pictures of the amp chassis.

Drilling holes in the back panel.
Click the image to open in full size.

The ends are 3 1/2" c-channel that I textured and then clear coated.
Click the image to open in full size.

Here's where a template of the amp boards comes in very handy.
Click the image to open in full size.

Unfortunately I broke two different taps while tapping holes for the amp boards. On one (3mm) I was able to knock the tap out with a punch, on the other (6-32) the tap was stuck good and I had to drill a second hole. Arg. The amps are mounted on short plastic standoffs.
Click the image to open in full size.

Test fitting with the ends in place. Thanks again to Variac for the c-channel.
Click the image to open in full size.

When assembled there is only about 3/16" clearance between the capacitors.
Click the image to open in full size.

Various parts for the amps.
Click the image to open in full size.

Test fitting the connectors on the rear panel. The power connector at the bottom is really small and most likely won't work out.
Click the image to open in full size.

Amp with the sides attached.
Click the image to open in full size.

The top and bottom are 1/2" oak.
Click the image to open in full size.

- Matt
  Reply With Quote
Old 29th February 2012, 03:53 PM   #18
diyAudio Member
 
Join Date: Mar 2005
Location: Bakersfield Ca
Nicely done Matt, having an eye for mechanical elegance you get 5 stars.

Bill
  Reply With Quote
Old 29th February 2012, 04:36 PM   #19
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
you need some holes on bottom and top plate ;

plenty of them .
__________________
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 1st March 2012, 07:58 AM   #20
slomatt is offline slomatt  United States
diyAudio Member
 
Join Date: May 2005
Location: San Francisco, CA
Quote:
Originally Posted by wirewiggler View Post
Nicely done Matt, having an eye for mechanical elegance you get 5 stars.

Bill
Thank you for the kind words.

Quote:
Originally Posted by Zen Mod View Post
you need some holes on bottom and top plate ;

plenty of them .
Definitely, I'm just trying to decide on the layout. I think I'm going to go with 4 1.5" holes on each end.

- Matt
  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
integrated amplifier with aleph p1.7 and mini aleph vivanco Pass Labs 10 20th April 2011 05:48 PM
Mini Aleph Board & Aleph 2 Parts List gpsmithii Pass Labs 3 16th January 2010 04:58 AM
mini aleph build questions mr.duck Pass Labs 33 11th May 2009 06:00 PM
WTB: Aleph-mini PCBs and transistor set for Aleph 30 needtubes Swap Meet 4 6th November 2005 07:29 PM


New To Site? Need Help?

All times are GMT. The time now is 02:47 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