How to wiring the transformer - 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 January 2009, 03:15 AM   #1
diyAudio Member
 
Join Date: Apr 2006
Location: Taipei
Default How to wiring the transformer

Dear sir,
Please kindly help me to check the wiring of this transformer
Thanks!
Click the image to open in full size.
Click the image to open in full size.

  Reply With Quote
Old 22nd January 2009, 05:26 AM   #2
Akita is offline Akita  Malaysia
diyAudio Member
 
Join Date: Dec 2006
Location: Kuala Lumpur
The turn ratio will give you the answer.

40:4:1

x2 = 80:8:2
x3 = 120:12:3
...
x6 = 240:24:6

So, if your input Voltage is 120Vac (connected to pin 1&2) then you will get 12Vac on pin 4&5, and 3Vac at pin 6&7

If your input Vac is 240Vac(connect pin 1&2) and then you will get 24Vac on pin 4&5, and 6Vac at pin 6&7

If you use Pin1&3 turn ratio should be 185:4:2
  Reply With Quote
Old 22nd January 2009, 08:40 AM   #3
diyAudio Member
 
Join Date: Apr 2006
Location: Taipei
but, 6&7 is short,
how can I measre the level from 6&7?
  Reply With Quote
Old 22nd January 2009, 12:57 PM   #4
Akita is offline Akita  Malaysia
diyAudio Member
 
Join Date: Dec 2006
Location: Kuala Lumpur
Basically all set of winding are shorted, but when you measure it with DMM it will create a resistance. But pin 6&7 winding is too little compare with 4&5 or 123, so the created resistance is very low, your multimeter may assume that it is shorted.
  Reply With Quote
Old 22nd January 2009, 01:01 PM   #5
Akita is offline Akita  Malaysia
diyAudio Member
 
Join Date: Dec 2006
Location: Kuala Lumpur
Sorry,..A little bit correction here
If you use Pin1&3 turn ratio should be 185:4:1
  Reply With Quote
Old 22nd January 2009, 04:07 PM   #6
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
How do you get that 185 number between pin 1 and 3 ?
__________________
DIYaudio for President !
  Reply With Quote
Old 23rd January 2009, 12:28 AM   #7
Akita is offline Akita  Malaysia
diyAudio Member
 
Join Date: Dec 2006
Location: Kuala Lumpur
From the picture;

The ratio is 40:4:1
40 is for pin 1&2, 4 is for pin 4&5 and 1 is for pin6&7

At the working voltages
Pin1&2 is 78v, Pin 1,2&3 is 370v.

Because of some winding resistance the voltage will drop a bit from 80v to 78v. So, the ratio is (78:7.8:2 ) / 2 = 39:3.9:1
This is almost same as the given ratio 40:4:1

If you connect to pin 1&3, it will become 370v:7.8:2. After divided by 2 = 185:3.9:1

To make it easier to read, It will be 185:4:1
  Reply With Quote
Old 2nd February 2009, 05:07 AM   #8
simon5 is offline simon5  Canada
diyAudio Member
 
Join Date: Nov 2004
Location: Québec, Québec
Thank you very much for your good explanation, I was curious.

It seemed simple, but couldn't find how to get it.
__________________
DIYaudio for President !
  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
Transformer wiring Calamaro Power Supplies 3 3rd July 2009 02:50 PM
I need help with my transformer wiring onform Power Supplies 0 1st June 2008 07:43 PM
transformer wiring homertooties Power Supplies 3 12th June 2007 08:19 AM
Transformer Wiring? Killjoy99 Parts 4 2nd October 2004 11:00 PM
Wiring of a transformer AudioFreak Parts 20 20th January 2002 02:40 PM


New To Site? Need Help?

All times are GMT. The time now is 11:03 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