This issue creeps up once in a while. I notice it more on the clean channel. Random static sound though the speakers. This may be caused by loading on the AC line or transients caused by the central heating and cooling system. This issue was more of a concern in one room I was using for general use. However, the issue was not associated with that one room as I moved the amp to a different location. Now the random static issue has lessened in occurrence but is still present even with the central heating and cooling system turned off. I have not unplugged the refrigerator yet as that may be another cause (that one uses an ECM motor on the compressor which in fact may be a brushless DC motor as I can tell the compressor is running at a variable speed). The dishwasher on the other hand is hard to avoid eliminating the line noise from that.... not the cause of the static problem.
I will order some new Mesa 12AX7 tubes to replace the ones in the amp as what I have now in my box of preamp tubes have been used at least once in the Roadster or Mark V. They are still good but would rather rule out preamp tubes with new ones. I also have a new set of Mesa power tubes 6L6 STR440 in a close color code to the one's that came with the amp. Perhaps I should try those too. If I cannot eliminate the static creep or random static issue with new preamp tubes or power tubes. I will give Mesa customer service a call on the issue.
Odd thing, I had both Roadster and JP-2C on the same ac line power up and active. I was using an isolated signal splitter to run both amps. Static is present though the JP-2C but not the Roadster.... the obvious is that both amps are not identical in design so that could be one thing. First I will see what new tubes will do if that does not resolve the problem I may be sending another amp to Mesa for service...... To note I have not even seen the innards of this amp so my warranty should still be intact. I will wait for the TC-50 to return before I send in the JP-2C.
I will order some new Mesa 12AX7 tubes to replace the ones in the amp as what I have now in my box of preamp tubes have been used at least once in the Roadster or Mark V. They are still good but would rather rule out preamp tubes with new ones. I also have a new set of Mesa power tubes 6L6 STR440 in a close color code to the one's that came with the amp. Perhaps I should try those too. If I cannot eliminate the static creep or random static issue with new preamp tubes or power tubes. I will give Mesa customer service a call on the issue.
Odd thing, I had both Roadster and JP-2C on the same ac line power up and active. I was using an isolated signal splitter to run both amps. Static is present though the JP-2C but not the Roadster.... the obvious is that both amps are not identical in design so that could be one thing. First I will see what new tubes will do if that does not resolve the problem I may be sending another amp to Mesa for service...... To note I have not even seen the innards of this amp so my warranty should still be intact. I will wait for the TC-50 to return before I send in the JP-2C.