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Old 25th June 2006, 07:40 PM   #1
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Default Gainclone power supply transformer - Help!

I went to a recycling center - (my dad knows these guys who work there - the place is probably loaded with well-working transformers and capacitors ) - and was digging through some stuff when I stumbled upon the most beautiful (maybe not visually but it was in GOOD condition) transformer. It's rated at 24v DC (huh? I'll Bridge Rectify it just in case ), 6a (YEEHAW!), and "47-420HZ" for hertz. Thats just it. Does that mean it can take 60HZ or does this mean something else? I really hope so! Thanks!
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Old 25th June 2006, 07:42 PM   #2
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Picture of scanned sticker on top of the transformer:

EDIT: Sorry about the fuzzy pics. I'm using a cameraphone.
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Old 25th June 2006, 07:46 PM   #3
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Picture of the transformer:
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Old 25th June 2006, 07:49 PM   #4
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Another picture of a DIFFERENT transformer that I found at the recycling center:
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Old 25th June 2006, 07:51 PM   #5
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The other transformer has no markings other than some code on the side. I figured out the primaries and secondaries but the VAC, A, and/(even)or VA are still unknown. I can run some multimeter tests so there shouldn't be any problem !
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Old 28th June 2006, 06:08 AM   #6
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Anyone have an Idea?
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Old 28th June 2006, 06:22 AM   #7
lgreen is offline lgreen  United States
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What's the problem? DC? put your multimeter on it, it probably outputs AC and you can measure the secondaries to see how much you got.
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Old 28th June 2006, 07:25 AM   #8
AndrewT is offline AndrewT  Scotland
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Hi,
if I am reading your pics correctly, you have a
290VA (6A *24*2) AC transformer.
That works from 47Hz to 400Hz. OK for 60Hz.
Has 2 120Vac primary windings that can be wired for 120Vac or 240Vac
Has two 24 Vac secondary windings that can be wired as centre tapped 24-0-24Vac, or separate 0-24, 0-24Vac, or paralleled 0-24Vac @ 12A.

Check for electrical isolation between all the separate windings and continuity through each winding.

When you first get ready to switch on, use a series light bulb to minimise (eliminate) the damage from a mis-wired connection.

If that VDC is not a typo then it's possible that the secondary voltage is only 17Vac and has been scaled to allow for rectification.

You are a brave (foolish?) man to consider plugging that mains connector into "live" supply on the IEC socket.
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Old 30th June 2006, 10:24 PM   #9
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Yes, the sticker says 24VDC, not VAC. I have a question though... are the 2 primary windings supposed to read as 0 ohms for connection ?
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Old 1st July 2006, 07:40 AM   #10
AndrewT is offline AndrewT  Scotland
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Hi,
what scale are you using on your multimeter to record a zero ohms resistance?
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