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Slo Scheme and opto's

6/21/2003 9:15 PM
Joe N.
Slo Scheme and opto's
I never really noticed this before, but in the Slo scheme, there is a place where an opto connects a 2.2m resistor from the third stage of the overdrive channel, to the grid of the the fourth stage. since the opto arrangement is such that it bleeds the clean signal through, it also means that it's junk is in there too. so my question is, when the overdrive channel is on in ths amp. is the grid to ground resistor from the third stage of the od circuit to the fourth really 2.2m, or does the opto put it in parallel with the 330K from the clean's signal, turning the 2.2M into roughly 300K?  
Joe N.