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  1. M

    Mark IV trouble with

    WOW! I think I solved it all!! I just cleaned all the contact, also into the valve connector, and YEAH!!! looks like is workin fine now!!! can't wait to see in the next days if it will keep workin fine! thx everybody!! :D HAPPY 2010!
  2. M

    Mark IV trouble with

    oh thx so much! I m gonna give a try! I also realized right now that on V5 there is written 12AT7 by someone else test I supose (or directly from Mesa? dunno) but they were replaced with 5 12AX7. May this be the trouble also? thx so much for your feedback!
  3. M

    Mark IV trouble with

    hi guys!! as 1st... happy new year! well I was reading all the forum and it was pretty helpful to solve a trouble with my Mark IV but I still have a little bit to solve.. I had this combo, bought used some years ago... I sold the cabinet and made it as a short head and never had trouble...
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