Recent content by karmar

Please please help me figure out my problem with my precious MarkIV: It sounds perfectly fine in all channels when the volume knob on my guitar is way down (say 3) - but when I turn it up, there is a loud crackle that is made along with the guitar notes... Interestingly, as I describe below, I...

How did you know you "blew a resistor"? What are the symptoms of blowing a resistor?

I have a new Mark IV - no pops when switching - even at high volume. I sympathize with the previous post who was discouraged at having a floor model. When I went to Guitar Center, they had 3 Mark IV's for me to try out - one blew a fuse when turned on - one had no reverb - and the third...

Imagine that you are taking a break from playing. Certainly, it is better for the tubes to leave the amp in standby if you are only going to be gone for 5 minutes. But, if you are going to be gone for 2 weeks, the tubes would have less wear if you turned off the amp and turned it on when you...

I just bought a new Mark IV - I absolutely love it, but I have one problem and I wonder if it is normal for all Mark IV's. My master volume does not allow ANY signal between 0-1. Then when I get to 1, it suddenly jumps to what I would call 3 on a Fender Twin. Then it is up to 5 on a Fender...