High current power supply

[pcmeiners]

For those looking for a cheap high quality power supply capable of 1200 watts of power at 12vdc look at the links below. With small changes internally the voltage can be adjusted. The last power supply I got off this seller were described as "used" ( Fujitsu DPS 800GB-3a, 800 watts), they were never used, not sure about this particular PS. 100-240V input.

For plating, de-rusting, battery charger, car jump ect. Cheaper than junk power supplies on Ebay. Second item is an edge card for easy wire connection.

https://www.ebay.com/itm/263405357062

https://www.parallelminer.com/?s=Breakout+Board+Adapter+compatible+with+HP+1200+watt+DPS-1200FB+

 

[My Old Tools]

I picked up a nice Lambda power supply on eBay for rust removal. Works great. Killed several battery chargers before I got it.

 

[dogdog]

Higher voltage is better than high current. 24VDC is ideal in most larger rustier parts.

I have never seen it going pass 10-ish AMP even with large old radiators that are over 100LBs and multiple used brake disc as an anode.

 

[pcmeiners]

"Higher voltage is better than high current. 24VDC is ideal in most larger rustier parts"

Not true, plating /rust removal is same principle.

https://www.ishor.com/general-plating-procedure-for-nickel-gold-silver-rhodium


Lambda power supplies are nice, they get pretty expensive.

 

[dogdog]

"Higher voltage is better than high current. 24VDC is ideal in most larger rustier parts"

Not true, plating /rust removal is same principle.

https://www.ishor.com/general-plating-procedure-for-nickel-gold-silver-rhodium


Lambda power supplies are nice, they get pretty expensive.

you'll find them a bit different when it comes to plating and rust removal, principle is about the same, but it is different.. go try it.

 

[nadogail]

I have often considered making my own power supply from a repurposed microwave transformer. I would first identify and remove the secondary windings and then wind a new secondary.

I realize not all of us have a familiarity with transformers but some of us grew up with vacuum tubes.

I have not tried rust removal, but I would bet that my welder would be powerful enough to clean up a large object.

 

[dogdog]

Most MOT rewound properly would work but you do have to realized that is AC.. and you'll have to get yourself a "FullBridge" rectifier plus the proper capacitor to smooth out the ripple voltages and make it DC. AC is no good for plating or etching or electrolysis...

for most home, I have not seen any current draw more than 10 AMP even on the most rusted steam radiators from 1930s... 12V would work, just slower, and for the same setup with radiators that have rust and mutli layers of paint... 12V would hardly budge it.. I am not too sure I remember what Voltage vs AMP is these days. pretty sure they haven't change.

so if you think that computer power supply build is worth the $ then go for it. just don't think having the extra capacity would give you faster results.

Me, I'll take a meanwell 24V or 48V PSU and control the output with a CC/CV controller would give me a better controllable output and still do an effective job.

https://www.ebay.com/itm/Mean-Well-...700464?hash=item3da787cef0:g:QEwAAOSwCP5fF1H9

 

[nadogail]

I agree that a bridge rectifier and appropriate capacitors and inductors will be required to make a pi filter to make smooth DC from a repurposed Microwave Oven Transformer.

My error was assuming that we all knew that.