The Aleph30 PCB layout - Page 28 - 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 28th February 2006, 10:37 PM   #271
diyAudio Member
 
Join Date: Sep 2004
Location: A bloke from Stoke
Default hot hot HOT

I thought my amp was very hot. I've never had an amp run this hot before and was a bit nervous so........ I borrowed a few thermistors from work and fastened them onto various components inside and outside the amp, closed it up and played it for 2 hours.
The top of the IRFP240's got as high as 67C, the tab of a 9610 on the differential pair got to 82C, ambient inside the amp was 48C, temp on the hottest spot of the heatsink was 55C.

These readings surprised me as I can barely hold the palm of my hand against the heatsink for more than a few seconds yet the temp on the 240 suggests my heatsinking is OK.

Question: is the tab temp on the 9610 a little high at 82C as the spec says absolute max is 150C at the junction.


BTW fantastic sounding amp

Kev
  Reply With Quote
Old 28th February 2006, 11:35 PM   #272
diyAudio Member
 
Join Date: Sep 2001
Location: Salt Lake City
The boards arrived while I was up in Montana. They look excellent... Great job Peter!

Mark
__________________
KSA-100 WIKI
  Reply With Quote
Old 1st March 2006, 02:54 PM   #273
diyAudio Member
 
Join Date: Dec 2005
Location: Norway
Ultrafast cross atlantic delivery , nice boards indeed.
Peter is the man.
Is there any parts list available to clone ?
  Reply With Quote
Old 1st March 2006, 06:13 PM   #274
diyAudio Member
 
Join Date: Sep 2004
Location: A bloke from Stoke
Quote:
Originally posted by wilbur-x

Is there any parts list available to clone ?

Attached is a BoM I used when making mine, it should be fairly obvious.

Kev
Attached Files
File Type: zip pd's aleph 30 bom.zip (3.0 KB, 790 views)
  Reply With Quote
Old 1st March 2006, 08:09 PM   #275
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Default Re: hot hot HOT

Quote:
Originally posted by KevinTams


Question: is the tab temp on the 9610 a little high at 82C as the spec says absolute max is 150C at the junction.



Kev

just place one mutual heatsink for both 9610.....even Alu plate is good enough
__________________
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 2006, 09:25 PM   #276
Mad_K is offline Mad_K  Norway
diyAudio Member
 
Mad_K's Avatar
 
Join Date: Sep 2002
Location: Norway
Default Re: hot hot HOT

Quote:
Originally posted by KevinTams


Question: is the tab temp on the 9610 a little high at 82C as the spec says absolute max is 150C at the junction.


Kev
No problem. Keep the junction below 100'C and your're in good shape.
Q1/Q2 junction temp: 82'C + (0,3W x 6,4'C/W) = 84'C
__________________
Mads K
  Reply With Quote
Old 2nd March 2006, 11:58 PM   #277
diyAudio Member
 
Join Date: Sep 2001
Location: Salt Lake City
Stupid question from me to all of you so I don't have to go back thorugh all the posts to find out but what type of 1/4 watt resistors this board laid out for? I have yet to use these little doggies yet and am curious.....

Thanks!

Mark
__________________
KSA-100 WIKI
  Reply With Quote
Old 3rd March 2006, 12:46 AM   #278
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Those are Phoenix SFR16S type: http://dkc3.digikey.com/PDF/T061/1218.pdf
or Caddocks MK132
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 3rd March 2006, 01:05 AM   #279
diyAudio Member
 
Join Date: Sep 2001
Location: Salt Lake City
Thanks Peter.,

That should be the last of my stupid questions....

Mark
__________________
KSA-100 WIKI
  Reply With Quote
Old 3rd March 2006, 01:26 AM   #280
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
The stuffing info was posted here: http://www.diyaudio.com/forums/showt...068#post617068
Attached Images
File Type: jpg a2.jpg (74.3 KB, 1449 views)
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  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
Eagle vs. Sprint-Layout for PCB design/layout hollowman Parts 11 12th January 2014 09:01 PM


New To Site? Need Help?

All times are GMT. The time now is 02:08 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