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Vintage threads from the first ten years
Small Stone color switch
 10/4/1999 2:41 AM |
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| Mark Hammer | Small Stone color switch What exactly does the "color" switch on the Small Stone do, both sonically and electronically? It's been almost 20 years since I've heard one, so my memory is dim. Looking at the schematic, one half of the DPDT switch routes the signal, and the other half seems to change the LFO in some way. Looking at the output, and considering the technology of the times, I'm guessing that straight and shifted signals are mixed together by the pair of 27k resistors, and exit via the .1uf cap. Based on this, I'm also guessing that what is being routed via the color switch is some regenerated signal via the other 27k resistor and 6800pf cap preceding it. The 100k resistor that gets engaged when the color is "on" serves as the other half of a resistive mixer prior to the input buffer (which isn't needed when the color switch is off, so it gets shunted). If the color switch alters the resonance, does this mean that the 27k resistor on the signal side of the switch can be replaced with some sort of variable resistance to produce variable resonance, and can the 6800pf cap from the output of the last stage be altered to produce different bandwidths of regenerated signal? I'm also kind of curious as to what the LFO side of the color switch does. Is there something that can be altered to produce variable depth (sweep range)? If so then we may well have a 2 or 3-knob Small Stone here instead of the one-knob job. Not to gild the lily here, but sometimes you need just a smidgen of what the "magic" button on an EH effect does, rather than a whole lot of it. I'm wondering how to do that. |
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| R.G. I'll take another look at the schem... -- 10/4/1999 1:45 PM R.G. Ok, first look. nic Mark, |