Power Supply Sources

[Sanghera]

Hi,
I was just wondering if anyone has any good power supply sources other than ebay and www.mpja.com. I have to purchase something over $100 US before they will ship to Canada and the power supply that would be good is less than half of that. I don't really want to buy a whole bunch of extra stuff just to make 100 buck total. I'm looking for a 24 to 32 Volt power supply and 7 amps or up, but lower may do aswell.
Thanks.

[H500]

Did you try surplus center? Don't know if they ship to Canada. Just watch out for the brokerage fees from UPS. It could cost more than the shipping.

[Sanghera]

Is that at www.surpluscenter.com?
Thanks for the help.
I really appreciate it.

[TinkerDJ]

If its an option you can make a power supply from an old microwave transformer. Bubba has a great how to in the forums. I tried to find a decent transformer here in canada as well. Its not as easy since we don't really have any companies like surpluscenter up here. The real problem is the weight of the transformer, cuases the shipping to usually be more then you pay for the transformer. Have you tried princess auto, sometimes they get a decent transformer in or they have some that can be rewired fairly easily. I built my transformer and powersupply, in the end only cost me about 30 dollars. I had some help from some great people here on the zone and FrankG from theworkshop.ca.

[Sanghera]

What kind of voltage output and amperage comes out of these transformers, I heard that taking apart a microwave is dangerous because of the radiation. Just so happens that our last microwave just broke down, not a power supply malfunction either. Could you give me more info on this. I'll look at Bubba's forum.
Thanks.

[2muchstuff]

Microwave ovens DO NOT HAVE ANYTHING RADIOACTIVE IN THEM. The only time they produce radiation is when the magnatron tube is energized. The magnatron tube is nothing more than a fancy vacuum tube, like the ones use in the old tube t.v.'s. The voltage that comes out of these transformers on the secondary side can be in the 1000's of volts. What you will end up doing is stripping the secondary side off and replacing it with a new lower voltage one. Something that you can deal with.

[TinkerDJ]

Here's Bubba's how to, its not hard to get the wire off the transformer and even easier to put the new wire on, once thats done test the voltage and your done.

http://www.cnczone.com/modules.php?n...warticle&id=27

[Sanghera]

I will probably put my order in for mpja.com, I'm not too sure about discharging the caps with that much voltage they can kill. I would have to know the proper way to do it, and still it could be dangerous.
Thanks for the help guys.
Really appreciate it.

[joecnc2006]

Originally Posted by TinkerDJ Here's Bubba's how to, its not hard to get the wire off the transformer and even easier to put the new wire on, once thats done test the voltage and your done. http://www.cnczone.com/modules.php?n...warticle&id=27

Does Someone have pictures for the steps above? this would be very helpful.

[Bubba]

Joe2000chee,
I never got around to doing any pictures of the procedure as the whole thing takes about two hours to do. Next time I make one, will try to remember to take the pictures.

[Sanghera]

Is it very dangerous Bubba? I'm not an electrical engineer or anything, but could this be done with just the steps you said?
Thanks.

[Al_The_Man]

The only thing to watch for is the cap charge
http://www.gallawa.com/microtech/cap_test.html
and even then if the microwave has been off for some time the cap usually has bled away.
Al