A question for the power supply part of the LEDS, hope someone can help me out here. I've added two LDR's for the dual equaliser (LDR 5 and LDR 6) and two leds for channelindication on the front panel of the amp. For one side i think i've got it correct now (18R resistor for the LDR's and a 220R for the channelindication). But now for the other side, if i switch the footswich, the upper 'bar' will become earth and you will get the situation in the lower schematic. So i understand that i can regulate the current with R64. But i cant seem to find the correct way how to calculate correct value of R64. And i think the signal led will need a separate resistor because of an other forward voltage then the LDR's. can someone help me out here?