by JustinJohn » Tue Feb 14, 2012 6:01 pm
I don't believe Jerrys twin was modded specifically in this regard. I have had my twin standing upright now for several months without a single problem. I will mention this however: I keep my twin upright with the light on top, and the inputs toward the bottom --- If I stand it upright the other way (with the light on the bottom) I get humming from my reverb tank.
Go figure...