Instruct: Classify an Amazon review as either positive or negative.
Query: Replace the 2N3055

I've got 3 of these supplies, with the digital meter option, and two of the three have blown their 2N3055 output regulator transistors when operated at a modest 10V at 1A for several weeks of continuous use. It's easy to fix but an irritation, otherwise this unit works well as a power supply for a constant temperature bath.