TekpowerTP5003D-3 Digital Variable Triple Outputs Linear-Type DC Power Supply, 0-50 Volts @ 0-3 Amps

This power supply has about a 20V glitch whenever an internal relay changes ranges during adjustment. While it's brief, it'll certainly kill op-amps and logic. This means you have to set the supply and then apply the load. If you try to bring the load up slowly, these spikes will kill it. I smoked 3 NE5532s before putting a 'scope on the output.Certainly not recommended.