Ht/ @kr1st when I opened the MFJ power supply I found & tweaked a pot for the voltage meter so it reflected the true output voltage. Then I adjusted the actual output voltage pot bringing it back up to the specified 13.8V. I didn’t do a “soak” test so I don’t know if would stay there stably.
I noticed yesterday testing the dummy load with RTTY is when transmitting a full duty cycle signal the MFJ voltage slowly crept up. Nearly a half volt. Just don’t trust it.