I have a 1974 marshall superlead 100 watt. I noticed that the power transformer gets really hot but not always. doesn't matter the location happens at gigs, practice..... last night it got really hot, too hot to touch. two nights ago it didn't get so hot - same location & set up. nothing different. I realize that us humans are whimpy when it comes to temperature. Usually we can stand up to about 130 140 Deg f without having to let go. I know there are a lot of variables.... Does anyone have or have had any experience with this issue & can lead me in the right direction?