The supply was a home brew (not me) and I think it goes to 30V, at 5V is using a small part of the pot so may have just crept up (internals warmed up or something) not sure, but as most variable bench supplies don't stop at just over 5V I'd prefer to run a crowbar next time. I've a variable 10A Watson Linear (max 15V) that will do 5V with a much more solid control, but again would be nice to know if the voltage pot got knocked the supply to the Kiwi would cut.
I look forward to your Kiwi online, I use mine mainly as a learning tool as the local man-made noise is so variable over the day (powerline networking, DSL and bad power supplies mainly). I've enjoyed using the full HF span of the Kiwi waterfall and spectrum display as a test device for various attempts at noise reduction, much more immediate feedback than other methods and can be done on a phone or tablet at the antenna. I absolutely would have given up on radio (again) at this location without the progress the Kiwi, garden spade, shielded CAT5E, earth rods and LZ1AQ active antennas have afforded me.