L'Amp: A simple SIT Amp - 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 3rd December 2011, 01:21 PM   #11
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
Here's one of the prototyping setups, good for testing all sorts of simple circuits:
Attached Images
File Type: jpg IMG_1156.jpg (201.0 KB, 3383 views)
  Reply With Quote
Old 3rd December 2011, 01:25 PM   #12
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
Here's how I did my point-to-point wiring. No excuses now first-timers!:
Attached Images
File Type: jpg IMG_1297.jpg (154.4 KB, 3257 views)
File Type: jpg IMG_1332.jpg (143.1 KB, 2689 views)
  Reply With Quote
Old 3rd December 2011, 01:28 PM   #13
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
Here's a pic of my negative voltage reference on perfboard:
Attached Images
File Type: jpg biassupply.jpg (143.0 KB, 2670 views)
  Reply With Quote
Old 3rd December 2011, 01:30 PM   #14
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
Here's what the chassis looks like without the side panels. There's no metal work in this project other than the heatsinks:
Attached Images
File Type: jpg IMG_1197.JPG (792.2 KB, 2572 views)
  Reply With Quote
Old 3rd December 2011, 01:36 PM   #15
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
On the subject of heat sinks, I used some big old Thermalloys drilled for TO-3, but I know they're hard to come by, so I tried this arrangement for you, dear reader. This is a small bracket made from aluminum angle purchased at Home Depot bolted to my favorite T-Slot heat sink from Newark. It works just fine:
Attached Images
File Type: jpg IMG_1404.JPG (835.0 KB, 1070 views)
File Type: jpg IMG_1400.jpg (150.2 KB, 1661 views)
  Reply With Quote
Old 3rd December 2011, 01:41 PM   #16
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
And, some random pics:
Attached Images
File Type: jpg IMG_1232.JPG (756.8 KB, 1204 views)
File Type: jpg IMG_1323.jpg (124.6 KB, 665 views)
File Type: jpg IMG_1314.JPG (837.7 KB, 868 views)
File Type: jpg IMG_1220.jpg (121.1 KB, 1425 views)
  Reply With Quote
Old 3rd December 2011, 01:55 PM   #17
crt is offline crt  Indonesia
diyAudio Member
 
crt's Avatar
 
Join Date: Apr 2007
Wuih, i only can say ==> WONDERFULL !
  Reply With Quote
Old 3rd December 2011, 01:59 PM   #18
BTW is offline BTW
diyAudio Member
 
Join Date: Nov 2002
Location: Singapore
Great Stuff.. Michael.. Just ordered some SK82 to try out.. My spks are 16 Ohm.. do I need to change any values ? Thanks
  Reply With Quote
Old 3rd December 2011, 02:09 PM   #19
diyAudio Member
 
Zero Cool's Avatar
 
Join Date: Sep 2004
Location: MN
Quote:
Originally Posted by Michael Rothacher View Post
And here are some of the bonus materials.

Here's a pic of the makeshift curve tracer I used:


FAHNSTOCK CLIPS! Love it!
__________________
It's not about what you can BUY...It's about what you can BUILD!
  Reply With Quote
Old 3rd December 2011, 02:34 PM   #20
diyAudio Member
 
Join Date: May 2001
Blog Entries: 5
Quote:
Originally Posted by BTW View Post
Great Stuff.. Michael.. Just ordered some SK82 to try out.. My spks are 16 Ohm.. do I need to change any values ? Thanks
It's a great question. You can certainly try it as-is and it will work, but if you build Figure 10 with an adjustable supply, you'll be able to fine tune things more readily.

For those without distortion analyzers, I'll soon post a table of operating point values for different loads assuming a 50-55V supply. Give me a week or so. We'll also play with the number of bulbs for good measure.

Last edited by Michael Rothacher; 3rd December 2011 at 02:38 PM.
  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
L’Amp: A Simple SIT Amp: Part 1 Michael Rothacher diyAudio.com Articles 23 1st September 2014 02:02 AM
SIT Amp Article Out Now Variac Site Announcements 0 2nd December 2011 08:55 AM
Srajan has the 1st SIT amp for Une dégustation vizion Pass Labs 131 15th November 2011 12:41 AM
SIT-Preamp VladimirK Solid State 36 27th August 2011 09:36 PM
New SIT - old problem StevenOH Parts 2 13th June 2008 11:46 AM


New To Site? Need Help?

All times are GMT. The time now is 11:43 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