How to calculate OPT transformer windings - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 22nd September 2011, 08:17 AM   #1
cgraf is offline cgraf  Switzerland
diyAudio Member
 
cgraf's Avatar
 
Join Date: Jan 2011
Location: Geneva
Default How to calculate OPT transformer windings

Hi all

I am actually sourcing the parts for the Pete Millett Engineering amp. As I am working in a company which also has a small production for High End Audio, I would have the possibility to get two output transformers custom made by our audio department (Nagra Audio). But they need the details to produce the transformer (windings, size etc...)

The problem is that I have nooooo clue on how to calculate a torodidal output transformer... What I know is this (the original design uses EDCOR iron)
- Input impedance: 8k
- Output impedance: 8Ohm
- Power: 25 Watts

Is there anybody who knows how to calculate the specs for this transfomer ? Or is there a software which lets me calculate it ?

Best regards

Christoph
  Reply With Quote
Old 22nd September 2011, 09:18 AM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally Posted by cgraf View Post
... to get two output transformers custom made by our audio department (Nagra Audio)...
Now that isn't hard to take

Personally i'd be leaning on the expertise of the guys in the winding dept. I'm sure they have their own bag of tricks that make a Nagra OPT a Nagra OPT.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 22nd September 2011, 09:44 AM   #3
cgraf is offline cgraf  Switzerland
diyAudio Member
 
cgraf's Avatar
 
Join Date: Jan 2011
Location: Geneva
hi dave,

tricks probably yes, but they want from me the number of windings :-( and the core dimension).....

bad luck....

take care,
Chris
  Reply With Quote
Old 22nd September 2011, 10:47 AM   #4
diyAudio Member
 
Alastair E's Avatar
 
Join Date: Feb 2004
Location: South Wales
Have a chat to Yvesm on this Forum.

He has a little tool I'm sure he will licence to you to design up Transformers....

I say, 'Licence' as you're a Commercial entity.....
__________________
Das Beste Oder Nichts
  Reply With Quote
Old 22nd September 2011, 11:01 AM   #5
cgraf is offline cgraf  Switzerland
diyAudio Member
 
cgraf's Avatar
 
Join Date: Jan 2011
Location: Geneva
Hi

Thanks for the hint. Unfortunately I am not a commercial entity, I just work for the same group, but in another company. And I am a network Engineer, doing audio "stuff" just as a hobby... Otherwise I would not have this kind of question ;-)

Best regards

Christoph
  Reply With Quote
Old 22nd September 2011, 11:09 AM   #6
diyAudio Member
 
Alastair E's Avatar
 
Join Date: Feb 2004
Location: South Wales
In which case, He'll prob be happy for you to use it with no licence...

Give him a shout anyay, explain the situation....
__________________
Das Beste Oder Nichts
  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
Shorted secondary windings of transformer Edvard Tubes / Valves 5 29th December 2010 10:22 PM
Transformer Windings impsick Chip Amps 6 2nd February 2007 11:00 AM
transformer primary windings Q AndrewT Power Supplies 6 28th October 2006 11:51 AM
Transformer windings identifications - how to get it? Alfetta87 Solid State 7 21st February 2005 04:01 PM
opt windings, need some help jazz Tubes / Valves 13 7th November 2003 02:50 PM


New To Site? Need Help?

All times are GMT. The time now is 10:31 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