I have a EHX holy grail reverb pedal i picked up in trade. It's pretty road worn but works fine. The pedal lets you choose between 3 modes but the chip inside actually has 8 modes. I have wired up 3 toggle switches and can pull each input high or low to get all 8 modes. I want to use a 8 position rotary switch with diodes to get all 8 modes. Best i can figure is 3 or 4 diodes and some jumpers across the switch, any thoughts? Pins are PIO0 PIO1 PIO2, they are normally high.
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Holy grail reverb mod
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I am also interested in this mod...can you post a quick how to? I came here because I got a HG nano that had a bad mode switch. I'm trying to find a way to put in a better switch that won't fail again because the one that came original is cheesy. Saw this and thought I could get a better switch and more out of the pedal.
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