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Re: Power Supply Unit
« Reply #120 on: January 20, 2011, 03:22:02 PM »
You can probably buy an unregulated power supply with toroidal transformer from Keling for less than what you can build it for.  He has a 38V, 15A for $139. 

Offline kolias

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Re: Power Supply Unit
« Reply #121 on: January 20, 2011, 06:02:42 PM »
You can probably buy an unregulated power supply with toroidal transformer from Keling for less than what you can build it for.  He has a 38V, 15A for $139. 

Very good info, however I would have liked to build one myself for the experience providing that it doesn't cost me an arm and a leg

Thanks
Nicolas

Offline Hood

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Re: Power Supply Unit
« Reply #122 on: January 20, 2011, 06:28:15 PM »
What voltage are your mains in Canada?

Offline kolias

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Re: Power Supply Unit
« Reply #123 on: January 20, 2011, 08:11:34 PM »
What voltage are your mains in Canada?

Household voltage here enters each house at 220V and then at the main panel is split to 220V for all major appliances like cooking stove, oven, electric heating, air conditioning etc. and 110V for all lights and wall outlets
Nicolas
Re: Power Supply Unit
« Reply #124 on: January 20, 2011, 10:17:17 PM »
That transformer should work fine.

Regards,
Ray L.
Regards,
Ray L.

Offline kolias

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Re: Power Supply Unit
« Reply #125 on: January 22, 2011, 10:19:56 AM »
To summarize all the discussions above, I made this small Excel file which can be useful next time a beginner like me asks the same questions.

People with no experience should not use this file before someone knowledgeable approves it just in case I have misinterpreted some data. After the approval, all cells can be locked except the input (yellow) cells.

If there are any suggestions to improve / modify this file, let me know and I will do it.
Nicolas

Offline kolias

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Re: Power Supply Unit
« Reply #126 on: January 26, 2011, 05:26:05 PM »

Got your caps sent off today, took them yesterday but they wouldnt accept as the plastic lathe tool box, I had them in, wasnt big enough for the customs label ::) Put them in a jiffy bag and posted today, they say 4 to 5 day delivery.

Hood


I received them today Hood including the holding clamps (very thoughtfull of you) , very much appreciated, let me know how I can repay you

I'm still looking for the transformer, never thought it will be so difficult. As I said previously I ordered the rectifier, fuse holder and the 5A fuse but I dont want to pay right now about $100.00 for the transformer because half of this cost is the shipping charges and I feel its a ripoff.

I have a friend in US and he is looking for me to get one locally and then he will ship it to my by US post
Nicolas

Offline Hood

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Re: Power Supply Unit
« Reply #127 on: January 26, 2011, 06:45:26 PM »
Good to hear it :)

There has to be some electronics/electrical places in Canada that you could get the transformer from, for the size you are looking for I could get one here probably around £30 delivered.
Hood

Offline Hood

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Re: Power Supply Unit
« Reply #128 on: January 26, 2011, 06:54:49 PM »
Quick google  brought up Newark and here is one, cant remember the exact specs you were needing but if this isnt right then I am sure there will be one there.
http://canada.newark.com/multicomp/mcta225-25/toroidal-transformer/dp/38K4918

Hood

Offline kolias

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Re: Power Supply Unit
« Reply #129 on: January 26, 2011, 08:12:06 PM »
Well, I dont know whats wrong with me but that place you found Hood looks great. They have the attached picture transformer for CAD$51.47 + $12.00 shipping by courier. That is a good deal but I’m not sure about the specs. If you look at the photo at the bottom it says “secondary current secondary series 4.5A” which sounds low to me.

Anyway if you say that is ok, I will order it otherwise the 30 pounds you suggested delivered also sounds good and if we choose to go this way I can send you a money order in pounds.

BTW what I need is 201VA or more, 25VAC
Nicolas