gamblor wrote:okay....... i am currently in the process of replacing my tubes and ive got a slight concern
when replacing the el-34's.... on my old tubes, there are pins spaced evenly all around the bottom of the tube. on the new tubes, it is the same alignment of pins, but there is one pin missing where there would usually be a pin on the old one. also, there are numbers on each of the pins on the new tube.
so with this in mind, does it matter what way i insert the tube?
(From my post above) : EL34's ( the big tubes) are keyed so they cannot be inserted improperly.
There is a plastic key in the center of the circle of pins. It is the key, so the tube can only be seated one way.