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A friend asked if I could mod his Neno Small Stone to produce the different exotic effects I can get on my Small Stone clone. Or rather, I said "If you like what mine can do, let me poke around inside yours and see if I can get it to do the same things".
Well, the problem is, the Nano series uses LM13700s, and surface mount components. That, in itself, is not THAT big a deal. The problem is, the only schematic I have for a dual-13700 circuit is from the early 80's, and it uses a quad LM324, while the Nano series uses two TLC2272 dual op-amps. and also changes the values of a a number of resistors, so pinpointing comparable parts of the circuit is difficult, if not impossible, o do.
I was hoping to be able to install a switch for producing vibrato, but I'll be damned if I can find the mixing node. All I've been able to find is this mod: EHX Nano Small Stone Mods - Distorque Audio although he also notes being stymied by the things I mentioned.
So, if you have a schematic, or simply know where the dry+wet mixing node is on the board, I'd be much obliged.
Well, the problem is, the Nano series uses LM13700s, and surface mount components. That, in itself, is not THAT big a deal. The problem is, the only schematic I have for a dual-13700 circuit is from the early 80's, and it uses a quad LM324, while the Nano series uses two TLC2272 dual op-amps. and also changes the values of a a number of resistors, so pinpointing comparable parts of the circuit is difficult, if not impossible, o do.
I was hoping to be able to install a switch for producing vibrato, but I'll be damned if I can find the mixing node. All I've been able to find is this mod: EHX Nano Small Stone Mods - Distorque Audio although he also notes being stymied by the things I mentioned.
So, if you have a schematic, or simply know where the dry+wet mixing node is on the board, I'd be much obliged.
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