I just noticed that on the 1968 schematics of the 911 there is a capacitor (C2) at the entry of the gate signal which is not on the Norlin Schematics. The value is .02.
At a rough guess I I wonder if this was included as a foil for rogue S trigger from the early keyboards ?
Sorry I don't know how to include a link but if you Google "Moog 911" the 1968 schematic should show up.
911 extra capacitor
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Rarecomponentadsr
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Stevie Ray
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Re: 911 extra capacitor
It's a de-bounce to the input of the transistor bistable pair Q13/Q14 - probably not required but if it's in the original schematic I'd prefer to include it.
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Rarecomponentadsr
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Re: 911 extra capacitor
Thanks for reply.
I did include this capacitor in one of my DIY 911 clones. I cannot tell yet if it's made any change to the 911's behaviour.
I did include this capacitor in one of my DIY 911 clones. I cannot tell yet if it's made any change to the 911's behaviour.