For those of you wanting a cheap power supply

[Accu157]

It's only 100W, but it might do the work for many applications. Just get a box for it and some banana ports, and you're off. There might be even better deals on this site. I might consider getting this for myself. I knew for a while in the past it was hard to find a power supply for a reasonable price. If it's reasonable quality, I dunno.

http://www.halted.com/ccp22523-power-supply--switching--12vdc-8-4a--100w-lps-100-12-21976.htm

[rmteo]

I got several 560W IBM 49P2020 server power supplies for $20 each. These are some of its outputs:
+12V @ 30A
+3.3V @ 20A
+5.0V @ 35A
They are great for all around R/C use, charging batteries, etc. Found one here for the same price:
http://cgi.ebay.com/IBM-xSeries-235-Power-Supply-49P2020-49P2038-Hot-Swap_W0QQitemZ250355191611QQcmdZViewItemQQimsxZ200 90111?IMSfp=TL090111115003r15411
http://i15.ebayimg.com/06/i/001/29/dc/b7d2_35.JPG

[sellonoid]

I bought 2 of these about 3 months ago, and they work great. My son and I are using them to run our BC6-10 chargers. The price seems too good to be true, but it's not.

http://cgi.ebay.com/DuraComm-Lp-14n-DC-Power-Supply-13-8-VDC-11-Amp-NEW_W0QQitemZ300287119148QQcmdZViewItemQQptZLH_Def aultDomain_0?hash=item300287119148&_trksid=p3286.c0.m14&_trkparms=72%3A1234|66%3A2|65%3A12|39%3A1|240%3A13 18|301%3A1|293%3A1|294%3A50
(http://cgi.ebay.com/DuraComm-Lp-14n-DC-Power-Supply-13-8-VDC-11-Amp-NEW_W0QQitemZ300287119148QQcmdZViewItemQQptZLH_Def aultDomain_0?hash=item300287119148&_trksid=p3286.c0.m14&_trkparms=72%3A1234%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50%20)
The only thing slightly unusual about the ones I bought, are that the power leads are hardwired to the supply and come out the back through a strain relief, but there's nothing wrong with that.

[Brandano]

Just take care of providing a load on the 5V supply (a large power resistor or a couple of car lamps in series will usually do) as switching power supplies don't like to work without load and can fail

[Oldrunk]

a 10W10Ohm load resistor between +12 and GND works perfect mount the resistor near the fan to keep it cooled, there are many guides on the net for turning old AT and ATX power supplies into bench supplies.
Example http://www.magicratproductions.com/magicforum/viewtopic.php?f=5&t=131

[Andrew0820]

a 10W10Ohm load resistor between +12 and GND works perfect mount the resistor near the fan to keep it cooled

Generally, these supplies are loaded on the 5v rail. A 10 ohm load applied to the 12v rail will draw 14.4 watts (V^2 / R) and may cause premature failure on a 10 watt power resistor -- in any event, it will run very hot.

andrew