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Thread: DIY Power Supplies- Transformers! Save $$

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    DIY Power Supplies- Transformers! Save $$

    Tip- If you have access to old UPS Battery Backup Systems (APC, TripLite) that your company or anyone is tossing to the trash- GRAB EM! Usually the larger units have 1 or 2 BIG transformers in there - 35a/70a/100a - THE SAME ONES FATBOY SELLS and he's pretty much getting them from the same source. I was fortunate to nab 4x 70a transformers from the trash pile. Use them to build an unregulated supply for your amplifier -which will float at 18-20v and hold 14.5 volts under load. All the amp builders use these in their base amps and power supplies (with exception of the Big Peter D transformers).
    Another good source for these things are larger power Inverters (usually rated for 1500 watts and above).

    Here's a diagram on what all the different wires do. 99% of the transformers that were pulled from inverters/battery backup units will have the same color codes..
    Attached Images Attached Images  
    Last edited by noisemaker; 12-06-2011 at 01:21 PM.

    noizybuilt.com

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    nice tip i will be looking around for some old ups systems next time i go to the dump

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    Now thats some awsome knowledge right there . thank you .

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    Very handy information that I never realized or even thought about before. I think it's time to take a trip to the trash heap this weekend!

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    even blown up its still too small to read .

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    i've got a question-i do have access to UPS systems from time to time.does anyone know of a source that would be willing to purchase the transformer or are they useless to a builder?i ask because i tend to sell them off for almost nothing because the batteries are junk so the people that i deal with don't pay much for them since they will have to replace the batteries.
    it would be nice to make a few more bucks at the end of the month.i am not greedy,just curious if i could get a little more for these things.i'd be willing of course,to pull them out and ship them only what they need,if anyone knows.thanks-Gravy626

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    Mistah Gravy what do you have and how much each? I have built many supplies with the pulled transformers and have had great luck with them. They are cheaper than buying NEW units. If you stack them to be a little more than you need they are awesome. I built a 5 pill base box with 2 of the 70a units and never drop below 16.5v with the amp giving all it has.

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    Quote Originally Posted by john doe View Post
    even blown up its still too small to read .
    If you go to http://www.icamanufacturing.com/store/Default.aspx and under the transformers you can find a bigger pic.

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    Quote Originally Posted by noisemaker View Post
    Tip- If you have access to old UPS Battery Backup Systems (APC, TripLite) that your company or anyone is tossing to the trash- GRAB EM! Usually the larger units have 1 or 2 BIG transformers in there - 35a/70a/100a - THE SAME ONES FATBOY SELLS and he's pretty much getting them from the same source. I was fortunate to nab 4x 70a transformers from the trash pile. Use them to build an unregulated supply for your amplifier -which will float at 18-20v and hold 14.5 volts under load. All the amp builders use these in their base amps and power supplies (with exception of the Big Peter D transformers).
    Another good source for these things are larger power Inverters (usually rated for 1500 watts and above).

    Here's a diagram on what all the different wires do. 99% of the transformers that were pulled from inverters/battery backup units will have the same color codes..
    This power supply information is a very helpful for us and i want to read more about it. I have seen that most of builders using it and it is good for them. I am exited to know that how many ways i can use it and how much watts capacity of inverter.

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    picked up a UPS system at our local transfer station this afternoon.we have one of those "leave something,or take something" tables and i often leave and also take from this table.today was a day to take from the table because there was a fully functioning UPS system on the table.it works so i am not sure what i will do with it but i am pretty sure i need to make a power supply for some equipment i have so i'll be checking out this DIY set of directions tomorrow!!!!

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