I just tried a GE 12AX7WA in V1 of my Elmwood Modena. I got no signal and saw that only half of the tube was lit up. I figured the tube just shorted out but for kicks I tried another one - same thing. I then tried a Chinese 12AX7 in V1 and it worked fine. Then I tried the GE's in a Marshall and they work fine in that amp. Why would these tubes not work in the Elmwood? I've never had a problem with any other tubes - could the pin arrangement be different?