So I just bought an early 70's V4 from a fellow TBer. He's a great guy and offered to change out the caps and screen resistors for me for a small fee before he mailed it. Here is the issue: when I put the volume knob past 10 o'clock to push the amp, I start to here some electrical noises. The first thing that I hear is a slight crackle / static noise after I hit the note, almost on the decay of it. The initial note is fine but then the noise happens. Second, when I start to play notes on the E string I start to hear defined clicks and pops on the note itself. Anywhere on the e string when I dig in I'm getting these distorted crackling. After the amps been pushed for awhile it starts to diminish a bit but is still there. I'm playing through an ampeg 810 and it doesn't matter if I kill the lows or not. I still get it. I played my markbass LMII through the ampeg to make sure that I'm just not hearing a bad speaker and the markbass sounds great. I also moved the amp off the cab to make sure vibrations weren't causing it. I swapped out 3 12AX7 and the 12AUD because I had spares of those and it didn't change.