SSLV1.1 builds & fairy tales - Page 105 - 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 15th April 2012, 12:31 PM   #1041
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I much prefer higher value resistors soldered in parallel. The original DCB1 could accommodate six //Rs for each CCS.
Then it is cheap and easy to increase CCS current by adding extra resistors and no de-soldering required. If the heat proves to be too much, then that last addition can be snipped off.

How does voltage regulator sense work into some other manufacturer's product?
__________________
regards Andrew T.
  Reply With Quote
Old 15th April 2012, 12:33 PM   #1042
diyAudio Member
 
Join Date: Jan 2007
I agree.
It'd be a good idea to have provisions on the PCB for installing resistors in parallel.
__________________
"You have a hierarchy: a mathematician, a physicist (which is a failed mathematician), and an engineer (which is a failed physicist)." - Andrew Jones
  Reply With Quote
Old 17th April 2012, 11:41 AM   #1043
Siberia is offline Siberia  Lithuania
diyAudio Member
 
Siberia's Avatar
 
Join Date: Feb 2011
Location: Vilnius
I want to use SSLV 1.1 for feeding 28VDC to my future Pearl II RIAA. Getting a 2x24 R-Core, I would get around 26VAC on my Tx secondaries because of local mains, and 26 X 1.33 = 34,5VDC after rectification. Is it enough for an extra voltage? Or are two 2x15 R-Cores recommended for bigger DCin?
  Reply With Quote
Old 17th April 2012, 11:46 AM   #1044
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
No.

How many times does it need to be repeated that the Salas Style Regulator needs >=7V across the CCS?
__________________
regards Andrew T.
  Reply With Quote
Old 17th April 2012, 12:05 PM   #1045
Siberia is offline Siberia  Lithuania
diyAudio Member
 
Siberia's Avatar
 
Join Date: Feb 2011
Location: Vilnius
I'm aware what's written in the guide. It says, at least extra 5V, but 7-10V recommended. The reason I'm asking this because i get <7V across, but with two 2x15 I would get into 45VDCin, which may be too much for cooling it down. All I wat to know which way is prefered.
  Reply With Quote
Old 17th April 2012, 01:36 PM   #1046
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Burn as much as you want on a CRC pre filter so you have control and extra filtering? Longer pants have always the better chance to get cut to measure.
  Reply With Quote
Old 17th April 2012, 01:42 PM   #1047
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally Posted by Siberia View Post
7-10V recommended. The reason I'm asking this because i get <7V across,.........
Have you checked what DC voltage with ripple voltage superimposed that will appear at the regulator power input when the mains voltage swings over the range from maximum supply to minimum supply?

It is the voltage amplitude at the minima due to the ripple that determines the worst case Vin at the regulator.
__________________
regards Andrew T.
  Reply With Quote
Old 17th April 2012, 02:41 PM   #1048
Siberia is offline Siberia  Lithuania
diyAudio Member
 
Siberia's Avatar
 
Join Date: Feb 2011
Location: Vilnius
Quote:
Originally Posted by AndrewT View Post
Have you checked what DC voltage with ripple voltage .
No.

I admit that I don't know the maths behind it, but would love to know how you do it.

Explaining that it's

Quote:
Originally Posted by AndrewT View Post
voltage amplitude at the minima due to the ripple that determines the worst case Vin at the regulator
is not enough for my knowledge level. Sorry.

Then I just realised that I would better use Pear II, omitting onboard regulator and feeding it with 24VDC of SSLV 1.1 Tx 2x24VAC is about right then for the purpose.
  Reply With Quote
Old 17th April 2012, 02:47 PM   #1049
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
Blog Entries: 7
Siberia, I am using 2 x 24v transformer with Pearl2 onboard reg removed.
__________________
Salas Boards 2014 #2 SHIPPED |F5TC board and power supplies available PM | Hot-Rod DCB1 boards and kits available PM |Mesmerize kits available (no boards)
  Reply With Quote
Old 17th April 2012, 03:08 PM   #1050
Siberia is offline Siberia  Lithuania
diyAudio Member
 
Siberia's Avatar
 
Join Date: Feb 2011
Location: Vilnius
OT. Quick question. I'm planning to remove U1, U2, and to replace them with 10R resistances making an additional CRC filter. I would connect shunt. reg. after this filter. Is that the way yours is made?
  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
GB Thread for Salas SSLV1.1 BiB shunt reg Tea-Bag Group Buys 1469 16th August 2014 01:34 PM
WTB : Salas SSLV1.1 BiB shunt CaNNA3IS Swap Meet 1 24th November 2013 09:43 AM
FS : 2 x Salas SSLV1.1 BiB PCB + 6 x IRF MiniKits korben69 Swap Meet 6 2nd July 2013 09:32 AM
Some VX.2 Builds CSS/XBL CSS 0 11th April 2013 05:34 PM
so who here builds amps amp builder jb Tubes / Valves 29 15th July 2005 08:23 PM


New To Site? Need Help?

All times are GMT. The time now is 01:54 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