Trippy. It just fell out and the sound verrrry slowly died. Never had this happen before. At first I didnt know what going on, and I kept upping the volume. Pretty soon there was no more sound , so I go round back to check the tubes and damn if theres not one missing! Opened the back of the 112 combo and sure enough, there lay the hapless 6L6. No damage. So I tightened up the buttfly retainers and put it back in. Have not turned it on yet, I was wondering if you fellas think its OK?