what tx needed - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 23rd October 2011, 10:35 AM   #1
paul.42 is offline paul.42  United Kingdom
diyAudio Member
 
Join Date: Jul 2007
Default what tx needed

hi all,how do you work out what tx is needed if it is +/- 50v after retifacation.
  Reply With Quote
Old 23rd October 2011, 10:44 AM   #2
AndrewT is online now AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
35Vac gives ~ 50Vdc, 35+35Vac gives ~ +-50Vdc.
Check through a few posts. You will find many estimating methods and a few that get much closer to reality. All involve the use of SQRT(2).

You need to know the rated input voltage as well as the rated output voltage of your proposed transformer. You also need the VA or current rating and the regulation figure of the transformer.
Finally you need the "normal" voltage available at your home. This "normal" varies from minute to minute and hour to hour, but should always be between the tolerance limits specified by your electricity supplier. Except when there is a mains failure where zero volts becomes available or "brown outs" when the available voltage falls below the lower tolerance limit.
As listeners we would not design for continued maximum sound quality during "brown outs". But we would design for "no damage" in event of mains failure and repeated attempts at restarts.
__________________
regards Andrew T.
  Reply With Quote
Old 23rd October 2011, 02:43 PM   #3
diyAudio Member
 
Join Date: Nov 2008
Attached a handy chart. E
Attached Images
File Type: jpg TransformerChart.jpg (574.7 KB, 23 views)
  Reply With Quote
Old 24th October 2011, 08:29 AM   #4
paul.42 is offline paul.42  United Kingdom
diyAudio Member
 
Join Date: Jul 2007
thanks guys.
  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
James O/P Tx M Gregg Tubes / Valves 11 27th April 2011 07:09 PM
5U4 Darling power TX advice needed waam68 Tubes / Valves 2 14th December 2008 07:15 PM
B+ TX. overkill? Richard Ellis Tubes / Valves 2 26th September 2006 09:12 AM
Onkyo TX-SV919THX Schematic Needed moe29 Parts 0 22nd April 2006 07:00 PM
TX help for GC yuval Chip Amps 11 7th April 2004 08:41 PM


New To Site? Need Help?

All times are GMT. The time now is 09:15 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