Originally Posted by Davethebluessinger
Thanks Rodneh, I never knew about the 5V rail needing the resistor.
I've also got these power supplies to work without that loading resistor on the 5 VDC output. There is a wide variety of power supplies out there from decades old to fairly new, so they must also have a wide variety of requirements for powering up.
If anyone wants to buy one of these things, take a look.
(This one has a 22 Amp output on its 12VDC line)
as well as www.jameco.com
sell a wide variety of power supplies, including dedicated units that have a 120 VAC input, and a 12 VDC output. They are also available in 5 VDC, 24 VDC, and a number of other fixed voltages. They tend to be expensive though.