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Old 29th July 2008, 03:14 PM   #1
kanifee is offline kanifee  United Kingdom
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Default 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
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Old 29th July 2008, 03:23 PM   #2
Puffin is offline Puffin  United Kingdom
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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 ?
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Old 29th July 2008, 03:38 PM   #3
kanifee is offline kanifee  United Kingdom
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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!
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Old 29th July 2008, 05:59 PM   #4
dnsey is offline dnsey  United Kingdom
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Even if you did centre-tap it (which is too much work to be worthwhile), you'd have 6-0-6V.
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Old 29th July 2008, 06:03 PM   #5
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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.
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Old 29th July 2008, 06:11 PM   #6
Nordic is offline Nordic  South Africa
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Yup, thats not even 50VA
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Old 29th July 2008, 07:47 PM   #7
Puffin is offline Puffin  United Kingdom
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kanifee. Have a look at the Rapid electronics site.
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Old 29th July 2008, 07:59 PM   #8
kanifee is offline kanifee  United Kingdom
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Ill head over there now

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Old 29th July 2008, 08:04 PM   #9
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Default 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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Old 29th July 2008, 08:25 PM   #10
kanifee is offline kanifee  United Kingdom
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So like this?

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