I had some Amazon.com gift cash available, and I became frustrated with my second switching bench power supply in a year giving up the ghost on me, so I tried buying a linear power supply, this one:
I've only really owned switching bench supplies as bench space is at a premium for me at the moment and I liked how much voltage and current one could cram into a small package.
With this one, when I adjust the voltage up and down through certain points, I can hear mechanical relays clacking, I'm assuming they're switching in and out the taps on the big-ass main transformer. Clack, click, clunk.
I'm a little concerned about these relays failing over time if Im often changing the supply voltage up and down - any experience with this?