Good Evening All, So i really new the whole amp thing, and dont know much about the design of them. But here goes. I picked up what i though to be a clean AL-811 amp. Got it home and started to learn the ins and out of tuning it. I got as far a pushing 600 watts with about 60w in. But it resulted in a high grid current. So i all Ameritron and try to get some help. They said it sounds like it is not tuned right, but the also said the check D16 which controls the grid current. I did some research and checked it with a meter and it doesnt seem to be bad. But looking at the coil (dont know the correct name, or what it does) and it looks like the taps have been changed around a bit. Attached is the photo, the pen shows the two taps that have been moved. So what does this do to the amp, I was gonna move them back but figured i would try to get some help before i did. Thanks for any help.