I just got my amp back from being serviced, and while the majority of the issues with it were fixed - when I plugged in my amp sounded incredibly bright and thin. Playing around with things, I noticed that when I tapped the amp there was a high pitched metallic noise, which I eventually traced by tapping to be a microphonic preamp tube in the first pre-amp slot.
Checked out the pre-amp tubes, and two of the tubes were 12ax7-A tubes, while the other, the one in the first slot, was a 12ax7-LPS. Did some reading, and in amps being cranked, often these can be caused to go microphonic, and cause this issue and overall possibly sound bad.
I switched two tubes positions and wow, my amp was back in business .. thicker, more low end, way more gain. Overall about %500 better sound.
The tip being the first preamp tube is VERY essential to the character of the gain in the preamp of your amp. Don't be negligent with preamp tubes - gets some decent ones that fit right with the tone you're going for and have fun.
Note - if you're in Canada and looking for tubes, I really can't find any other place that has better prices or service than www.thetubestore.com
pretty much any brand, any style, super decent prices and great descriptions and data with each one. Can't recommend them enough
Subscribe to:
Post Comments (Atom)
Posts
0 comments:
Post a Comment