Today I received a Mullard GZ33/CV5745 (says British made) rectifier tube for my VTA ST-120 via usps from Upscale audio in california.
Paid a cool 100 bucks for it. When I carefully unpacked it out of the peanut foam it was in and then in another small box with bubble wrap around the tube. I gently move the tube around and its rattling like a baby's rattle. Is this cause to have any concern or is it normal for this tube.
I really dont want to install the tube if its defective right off the bat and cause any other damage to the amp.