Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

SSLV1.1 builds & fairy tales
SSLV1.1 builds & fairy tales
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 12th October 2011, 12:36 PM   #521
Sergelisses is offline Sergelisses  France
diyAudio Member
 
Join Date: Nov 2003
Location: Near PARIS
Quote:
Originally Posted by AndrewT View Post
It depends on what you require.
Output voltage and transformer voltage are only two parts of a much wider brief.
Thank you so much for your answer
  Reply With Quote
Old 12th October 2011, 12:45 PM   #522
AndrewT is offline AndrewT  Scotland
R.I.P.
 
Join Date: Jul 2004
Location: Scottish Borders
Is the brief a secret?
__________________
regards Andrew T.
  Reply With Quote
Old 12th October 2011, 12:55 PM   #523
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
SSLV1.1 builds & fairy tales
AndrewT,
Are you referring to his trannies VA? I think you may have left you point too open ended.
__________________
Salas Boards 2018#1 On Order | Hot-Rod DCB1 boards and kits In Stock, PM | M2C Boards, PS and transformers Available PM | Sony VFET CSX2 AL boards In Stock
  Reply With Quote
Old 12th October 2011, 02:02 PM   #524
Sergelisses is offline Sergelisses  France
diyAudio Member
 
Join Date: Nov 2003
Location: Near PARIS
Quote:
Originally Posted by Sergelisses View Post
I plan to do two regulators : 3.3v and 5v and i have 2x12v transfo .
Is it too high ?

Serge

The question is can i use a RCore transfo 230v~ 2x12v~ ( 30VA) for the regulators 3.3v and 5v.
One 12v~ for the 3.3v and the other 12v~ for the 5v ?

Serge
  Reply With Quote
Old 12th October 2011, 02:42 PM   #525
Backbones is offline Backbones  United Kingdom
diyAudio Member
 
Join Date: Sep 2008
Quote:
Originally Posted by Sergelisses View Post
The question is can i use a RCore transfo 230v~ 2x12v~ ( 30VA) for the regulators 3.3v and 5v.
One 12v~ for the 3.3v and the other 12v~ for the 5v ?

Serge
If we multiply by AC output of your transformer by 1.4 we get the approx voltage DC your regulator will have to deal with, which is 16.8V. So we need to convert 16.8 to 3.3 and 5v so depending on the regulator type that will cause heat generation as it brings down the voltage. It is quite possible but would be more efficient if you brought the transformer voltage down. You need to include some voltage off for the diode bridge and allow some voltage headroom to operate the voltage regulator.
Chris
  Reply With Quote
Old 12th October 2011, 03:38 PM   #526
AndrewT is offline AndrewT  Scotland
R.I.P.
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally Posted by Backbones View Post
depending on the regulator type that will cause heat generation as it brings down the voltage.
Backbones is quite new to this and already he has identified an area that has not been considered in the brief.

How can anyone think that 12Vac and 5Vdc is sufficient to start a design analysis?
__________________
regards Andrew T.
  Reply With Quote
Old 12th October 2011, 04:13 PM   #527
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
SSLV1.1 builds & fairy tales
The brief says 5VDC drop is recommended across the reg, 6.3VAC min 36VAC max transformer. That should suffice.
  Reply With Quote
Old 12th October 2011, 07:11 PM   #528
AndrewT is offline AndrewT  Scotland
R.I.P.
 
Join Date: Jul 2004
Location: Scottish Borders
******* Hell !
What about current demand?
What about power dissipation?
__________________
regards Andrew T.
  Reply With Quote
Old 12th October 2011, 07:20 PM   #529
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
SSLV1.1 builds & fairy tales
Its mentioned in the guide. Appendix 6.
Attached Images
File Type: gif A6.gif (134.2 KB, 440 views)
  Reply With Quote
Old 12th October 2011, 07:25 PM   #530
AndrewT is offline AndrewT  Scotland
R.I.P.
 
Join Date: Jul 2004
Location: Scottish Borders
Is 200mA output current what he needs/wants?
Is he going to use a ventilated case or unventilated internal heatsinks or external heatsinks?
Both he and us need information from a brief to be able to start to answer the question
Quote:
Is it too high ?
__________________
regards Andrew T.
  Reply With Quote

Reply


SSLV1.1 builds & fairy talesHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Legis' Horny Tales Legis Multi-Way 176 11th September 2017 12:21 PM
Any successful/unsuccessful tales of loading a large Coax in a front horn? POOH Multi-Way 35 22nd November 2015 08:58 PM
Fs: Salas SSLV1.1 BIB janos_904 Swap Meet 13 27th May 2015 08:36 AM
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


New To Site? Need Help?

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


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki