I am sure some of you have read my rants on the troubles I've had rebuilding my 70's SVT. Today, the place I purchased my Sovtek KT-88's from (fliptops.com, VERY cool people!) confirmed what my tech had told me, that one of the tubes sent a ground to the #4 pin, instead of the #1 pin. In lay terms, this sent 300+ volts into the bottom metal ring on the tube, which is mounted to the chassis using a metal clip. Immediately upon firing it up, it sent all of that voltage directly into the amp chassis, immediately frying the amp. Best case scenario, I have to buy a $270 power transformer that was definitely fried. Worst case.....who knows. Anything could be toast after that shock, and we wont have any idea where things stand until a new transformer is installed to further access the situation. New sensor offered me a new set of power tubes (WOW, since these has less than a second on them before the amp went up in smoke!), and told me "sorry about your luck" on all the stuff their defective tube fried. Maybe I am looking at this the wrong way, but I feel that since their defective product directly damaged my gear, they should be responsible for the damages. That's not their opinion. I went with these tubes upon the high reccomendation of someone who definitely knows their stuff, but after this I am not sure I want to deal with them at all. Oh well, buyer beware.