The simplistic Salas low voltage shunt regulator - Page 95 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 4th August 2009, 06:16 PM   #941
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Only if it has a fan. You are about to burn 2.5A at 12V, I.e. 30W. For the T Amp there is no high constant bias that it burns it so to take the burden off the shunt, like a class A amp with big idle bias and chunky shinks does. It only burns dynamically from it when it plays. The shunt will be getting less heat the stronger the amp plays. When the T Amp idles, the shunt gets it all. You will need a 0.5C per W heatsink.
  Reply With Quote
Old 5th August 2009, 02:11 AM   #942
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Tham, please let us know how your t-amp works with the new regulator, when you get a chance. Hope to finish my high current version soon too.
  Reply With Quote
Old 5th August 2009, 02:25 AM   #943
Tham is offline Tham  Malaysia
diyAudio Member
 
Join Date: Jun 2006
Iko, will try Salas v1 for a start...trying to find the right heatsink now.
  Reply With Quote
Old 5th August 2009, 03:43 AM   #944
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
I think it's a good idea, since we know for sure it works. Good luck.
  Reply With Quote
Old 5th August 2009, 04:32 AM   #945
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi stormsonic,
Quote:
can you please post shematic for me to understand. One pic is worth more than a 1000 words, hand drawn will be OK.
Sure, no problem. I'm hitting the sack right ow, but I'll scratch out a diagram for you tomorrow.

We may be talking about the same thing, we'll see tomorrow.

-Chris
__________________
"Just because you can, doesn't mean you should" my Wife
  Reply With Quote
Old 6th August 2009, 12:26 PM   #946
Marinos is offline Marinos  Greece
diyAudio Member
 
Marinos's Avatar
 
Join Date: Mar 2003
Location: Athens
Hi all and I wish not to get any answer because you are all at vacations
For some months now, a pair of salas shunts have replaced batteries in my line amp with spectacular results. In order to clean up the mesh and close the chassis I would like your opinion on this.

The line stage consists of a opa627 buffer, a volume control and an opa627 output stage.

Now the shunts go where the batteries before them. That means per chanell per rail

- a small inductor
- 1000 uF
- and then to each chip with 1R/47uF on chip's rail pin

Should I leave it like this or remove inductor + 1000uF ?
__________________
Marinos
  Reply With Quote
Old 6th August 2009, 12:40 PM   #947
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally posted by Marinos
a pair of salas shunts have replaced batteries in my line amp with spectacular results.........................
- a small inductor
- 1000 uF
- and then to each chip with 1R/47uF on chip's rail pin

Should I leave it like this or remove inductor + 1000uF ?
Hi,
if the inductor version sounds spectacular, then why change it?

Only you can experiment and find out whether removing the inductor can make it more or less spectacular.
__________________
regards Andrew T.
  Reply With Quote
Old 6th August 2009, 04:15 PM   #948
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally posted by Marinos
Should I leave it like this or remove inductor + 1000uF ?
Its OK as it is, although a coil smooths it up high just a bit, does not alter it, we had experiments, it is still perceptibly positive, if before the shunt. After the shunt it messes with its low output impedance. I don't know if it helps the chips more than what an impedance alteration can do as harm. Bypass and listen, compare.
  Reply With Quote
Old 6th August 2009, 06:40 PM   #949
Marinos is offline Marinos  Greece
diyAudio Member
 
Marinos's Avatar
 
Join Date: Mar 2003
Location: Athens
Thank you Andrew and salas.
__________________
Marinos
  Reply With Quote
Old 7th August 2009, 11:18 AM   #950
Tham is offline Tham  Malaysia
diyAudio Member
 
Join Date: Jun 2006
Salas, canabalised a heatsink from my unused AV amp and tested my new v1 shiunt for T amp...the output without load measured only about 8V. Is something that I have done wrong?
  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



New To Site? Need Help?

All times are GMT. The time now is 03:39 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