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  1. N

    Mark V “Volume 1” and IIC++ mod

    I added Volume 1 of CH3 as well as Arossi52. I changed the SOLO on the panel to Volume 1 and ported C18 to the MUTE switch. I used the one on the panel because both SOLO and MUTE are done with footswitches. Exactly!
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    Mesa MarkV / Saturation 'mod'

    Apparently I was in the wrong place to write.
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    Mark V adjustable bias mod

    It is best if you can prepare matched quad tubes, but two sets of matched pairs should work well enough. The bias voltage cannot be adjusted for each pair. And to do that we have to prepare a number of variable resistors. The only thing we can do without changing the circuit is to add a bias...
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    Mark V adjustable bias mod

    My MV was fortunately identical to the schematics that were available. Schematics below. I just modified this bias circuit as follows. To be precise, I have also removed the LED and installed the check terminal. With this modification, the bias voltage of my MV can now be adjusted from...
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    Mark V adjustable bias mod

    I am writing for the first time. I installed a bias adjustment POT on my V. This is August 2022 and it is working without any problems.
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