I’ve had my Markbass Little Mark Tube 800 for almost 4 years now and I’ve run into this issues for the second time. Whenever the “mix” solid state/tube dial is set to 100% tube the volume gradually cuts out almost entirely after a few minutes of playing. The volume increases back to normal when the dial is turned back to solid state.
2 years ago I sent it out for warranty repair to have the issue fixed. They replaced the pot, which seemed to do the trick. The issue came back about a month ago. I brought it to a local tech who told me the soldering job was done sloppily and he cleaned it up, but that did not solve the problem. I assume the tube is ok, considering neither tech thought it was bad. What could be causing this problem?
Little Mark Tube 800 played through a Markbass New York 151.
2 years ago I sent it out for warranty repair to have the issue fixed. They replaced the pot, which seemed to do the trick. The issue came back about a month ago. I brought it to a local tech who told me the soldering job was done sloppily and he cleaned it up, but that did not solve the problem. I assume the tube is ok, considering neither tech thought it was bad. What could be causing this problem?
Little Mark Tube 800 played through a Markbass New York 151.
