messing with a transformer

kanifee · 29th July 2008, 03:14 PM

After some advice, may be completely undoable but i thought id ask, if i had a transformer that had the sort of spec i required for a certain job but wasnt center tapped and i needed a center tap could i modify the transformer to have one? if so how would i go about it and if not please forgive me i apologize a thousand times

Puffin · 29th July 2008, 03:23 PM

Don't appologise for blowing yourself up, cos it aint happened............YET.

What is the transformer you have got. Single Tap, Dual Tap, Doolally Tap ?

kanifee · 29th July 2008, 03:38 PM

This is it, it mesures 12.8v AC across the yellow wires so i take it its a single secondry at 12v i need 12v 0v 12v, im grasping at straws i guess and should stop being cheap and buy one!

dnsey · 29th July 2008, 05:59 PM

Even if you did centre-tap it (which is too much work to be worthwhile), you'd have 6-0-6V.

pacificblue · 29th July 2008, 06:03 PM

Quote:

Originally posted by kanifee
This is it, it mesures 12.8v AC across the yellow wires so i take it its a single secondry at 12v i need 12v 0v 12v

So you have 0-12. Would a center tap not give you 6-0-6 then?

Quote:

Originally posted by kanifee
im grasping at straws i guess and should stop being cheap and buy one!

Especially in that power and price range.

Nordic · 29th July 2008, 06:11 PM

Yup, thats not even 50VA

Puffin · 29th July 2008, 07:47 PM

kanifee. Have a look at the Rapid electronics site.

kanifee · 29th July 2008, 07:59 PM

Ill head over there now

stevecole · 29th July 2008, 08:04 PM

Not worth the trouble attempting to rewind that transformer. You want 12-0-12v? Get one with 2 independent secondaries of 12v. They will each be marked "0-12". Connect the "12" of the first winding to the "0" of the second, and there you have it. Visit the RS Components website to get an idea of the various types available.

kanifee · 29th July 2008, 08:25 PM

So like this?

29th July 2008, 03:14 PM	#1
kanifee diyAudio Member Join Date: Apr 2008	messing with a transformer After some advice, may be completely undoable but i thought id ask, if i had a transformer that had the sort of spec i required for a certain job but wasnt center tapped and i needed a center tap could i modify the transformer to have one? if so how would i go about it and if not please forgive me i apologize a thousand times

29th July 2008, 08:04 PM	#9
stevecole diyAudio Member Join Date: Apr 2008	Centre-tapped transformer secondary Not worth the trouble attempting to rewind that transformer. You want 12-0-12v? Get one with 2 independent secondaries of 12v. They will each be marked "0-12". Connect the "12" of the first winding to the "0" of the second, and there you have it. Visit the RS Components website to get an idea of the various types available.

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29th July 2008, 03:23 PM	#2
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Don't appologise for blowing yourself up, cos it aint happened............YET. What is the transformer you have got. Single Tap, Dual Tap, Doolally Tap ?

29th July 2008, 03:38 PM	#3
kanifee diyAudio Member Join Date: Apr 2008	This is it, it mesures 12.8v AC across the yellow wires so i take it its a single secondry at 12v i need 12v 0v 12v, im grasping at straws i guess and should stop being cheap and buy one!

29th July 2008, 05:59 PM	#4
dnsey diyAudio Member Join Date: Mar 2004 Location: Shropshire, England	Even if you did centre-tap it (which is too much work to be worthwhile), you'd have 6-0-6V.

29th July 2008, 06:11 PM	#6
Nordic diyAudio Member Join Date: Sep 2005	Yup, thats not even 50VA

29th July 2008, 07:47 PM	#7
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	kanifee. Have a look at the Rapid electronics site.

29th July 2008, 07:59 PM	#8
kanifee diyAudio Member Join Date: Apr 2008	Ill head over there now

29th July 2008, 08:25 PM	#10
kanifee diyAudio Member Join Date: Apr 2008	So like this?