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Old 21st May 2008, 02:24 PM   #1
wilco is offline wilco  Australia
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Question Wiring assistance please

Hello All,

I put together boards from chipamp.com some time ago, I've finally gotten around to getting this ready to play music. I have a transformer here and need a little help on wiring it up to the power supply board...

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without sounding totally dim...can anyone tell me which wire goes where?

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I also need a source in Aus for the non-conductive thermal pads if anyone has any ideas...

Thanks for your help
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Old 21st May 2008, 03:32 PM   #2
wboyd is offline wboyd  United States
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Wilco,

Just from looking at your transformer...it looks like your white-pink and your yellow-red are your AC1/AC2 wires (on the power supply board) and the Orange are the hot and neutral wires (coming from your wall outlet).

Hookup a wall plug (with fuse) on the orange wires and test the secondary connections (white-pink/yellow-red) with a meter (set to AC) and you should get what is stated on the transformer or very close to what is stated....depending on the AC in your house. Once you establish that you are getting the proper voltage…hook these wires up to the power supply board of your amp.

If you are not comfortable doing this....then ask someone close to you who might be more experienced in the field – hate to see someone get shocked (or hear about it)

All that being said....I have to admit that I am not familiar with your power grid down there is Perth!

Wayne
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Old 21st May 2008, 10:16 PM   #3
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It might be useful to meter the resistance from each wire to see which ones are "paired".

The pair that has the higher resistance should go to the wall outlet. The transformer sticker says what wboyd has written, but you can always measure if you feel in doubt.
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Old 22nd May 2008, 08:53 AM   #4
AndrewT is offline AndrewT  Scotland
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Hi,
using the info from the last pair of posts.
1.) connect all six wires into six terminals of a terminal strip. Screw the terminal strip to a piece of insulating board.
2.) set your meter to low ohms.
measure the various windings to confirm the pairs at near zero resistance.
They should be org-org, wht-pik, yel-red.
3.) set you meter to 600Vac.
4.) wire up a mains light bulb tester with plug top, bulb holder and socket outlet. Start with a 40W mains bulb.
5.) plug your transformer org-org into the tester outlet.
switch on at the wall. Check the voltage across org-org.
check the voltage across wht-pik.
check the voltage across yel-red.
6.) switch off.
7.) connect a jumper wire between pik & yel.
8.) switch on through the tester again.
measure the voltage across wht - red.

report all your results.
then part2.
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Old 22nd May 2008, 12:50 PM   #5
glennb is offline glennb  Australia
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Quote:
Originally posted by wboyd
Wilco,

Just from looking at your transformer...it looks like your white-pink and your yellow-red are your AC1/AC2 wires (on the power supply board) and the Orange are the hot and neutral wires (coming from your wall outlet).

Wayne
Yep, that's right, here's the schematic -> http://www.chipamp.com/images/ps.gif.

Connect white and pink wires to each of the AC1 terminals (doesn't matter which way around), and yellow and red wires to each of AC2 terminals (doesn't matter which way around). Orange and orange wires (doesn't matter which way around :-/) go to the 240V AC mains active (brown) and neutral (blue), via say a 5A slow blow fuse on the active side.

I looks like Wilco got this Chinese 300VA toroid from JAYCAR. I've bought a few from them in Melbourne.
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Old 22nd May 2008, 01:11 PM   #6
wilco is offline wilco  Australia
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spot on Gleenb, thanks for the info...

any idea on the thermal pads?
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Old 25th May 2008, 09:47 AM   #7
glennb is offline glennb  Australia
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Quote:
Originally posted by wilco
spot on Gleenb, thanks for the info...
any idea on the thermal pads?
What thermal pads are you referring to?
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