Mine arrived with a burnt cable smell. I tested it carefully but it only put out 97.4 volts. It also worked very dirty on my ham radio gear. I feel unlucky having trusted Samlex in my ham hobby for over 20 years. It seems that this is the case now because so far the return process with the seller is going well. No hassles, quick service, the kind of company I love. I replaced it with a PST-1500-12 today, just in time to return to my state forest volunteer fire station. I see the usual solid performance of the new device. Nothing surprising.