Well as it turns out… the people complaining on the internet were on to something… Paul Azzi was right all along and people tried to say it was him not knowing what he was doing. We get it… you don’t need to turn all the settings to 10. But there is a flaw. Randal Smith made the first prototype and it was unstable. It’s possible Gibson fired him before he could get it stable and just rubber stamped it…
Earlier in this thread I asked if there was a way to bypass the reverb and just take it out of the circuit by leaving the pedal in and there were a few folks that said the reverb caused noise.
Dann Val made an outstanding video demonstrating what causes the oscillation. I can’t believe this wasn’t figured out sooner considering how simple it is. Maybe some people knew, but they just didn’t want to deal with posting about it…
There are a lot of threads on the mark iic++ by now, but this is the main thread, so I just wanted to update it.
TLDR: Remove 2nd power tube and unplug the reverb! The oscillation is caused by the reverb circuit sharing a tube with main circuit. No mods required, just simply plug it back in if you want to sell your amp
Here is the video:
The thread that was made for this specific issue:
https://www.rig-talk.com/forum/thre...ation-youtube-done-right.333307/#post-4481921
